ent

- support md5 sum check
- support body length check
- support data post transmit

.gitignore

@@ -1,3 +1,6 @@
 /config.yml
 /config.json
 examples/
+/cachet-monitor
+/cli
+build

CODE_OF_CONDUCT.md

@@ -0,0 +1,74 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at management@castawaylabs.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Castaway Labs LLC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

api.go

@@ -9,7 +9,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/Sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 )
 
 type CachetAPI struct {
@@ -33,6 +33,8 @@ func (api CachetAPI) Ping() error {
 		return errors.New("API Responded with non-200 status code")
 	}
 
+	defer resp.Body.Close()
+
 	return nil
 }
 
@@ -49,6 +51,8 @@ func (api CachetAPI) SendMetric(id int, lag int64) {
 	if err != nil || resp.StatusCode != 200 {
 		logrus.Warnf("Could not log metric! ID: %d, err: %v", id, err)
 	}
+
+	defer resp.Body.Close()
 }
 
 // TODO: test
@@ -75,5 +79,7 @@ func (api CachetAPI) NewRequest(requestType, url string, reqBody []byte) (*http.
 	}
 	err = json.NewDecoder(res.Body).Decode(&body)
 
+	defer req.Body.Close()
+
 	return res, body, err
 }

cli/Dockerfile

@@ -0,0 +1,12 @@
+# build stage
+FROM golang:alpine AS build-env
+RUN set -eux; \
+    apk add --no-cache --virtual .build-deps \
+    git gcc libc-dev;
+ENV GO111MODULE on
+WORKDIR /go/main
+ADD go.mod go.sum ./
+RUN go mod download
+# WORKDIR /go/src/status-monitor
+ADD main.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -a -installsuffix cgo -o main main.go

cli/Makefile

@@ -0,0 +1,3 @@
+build:
+	docker build .
+

cli/go.mod

@@ -0,0 +1,12 @@
+module main
+
+go 1.13
+
+require (
+	github.com/castawaylabs/cachet-monitor v1.1.0 // indirect
+	github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
+	github.com/milkinteractive/cachet-monitor v1.1.0
+	github.com/mitchellh/mapstructure v1.1.2
+	github.com/sirupsen/logrus v1.4.2
+	gopkg.in/yaml.v2 v2.2.7
+)

cli/go.sum

@@ -0,0 +1,20 @@
+github.com/castawaylabs/cachet-monitor v1.1.0 h1:T8NshhwHjEIbdlWkeRBuYdnU2ktpBnZpwgh6nxrp62w=
+github.com/castawaylabs/cachet-monitor v1.1.0/go.mod h1:FBK1+4+fLd80wd/+U4Zy8YshPlpgWEvup79AoapOZ2E=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815 h1:bWDMxwH3px2JBh6AyO7hdCn/PkvCZXii8TGj7sbtEbQ=
+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/milkinteractive/cachet-monitor v1.1.0 h1:IyX/gYVDfSEwO4kbNMs9W4hLt5FXIV/ig/4c1nFVlfU=
+github.com/milkinteractive/cachet-monitor v1.1.0/go.mod h1:Y+g0f0C8fAj2ub5RhfQgh/oU85pYx6QbL/56WMFkmVo=
+github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
+github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
+github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

cli/main.go

@@ -11,19 +11,18 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/Sirupsen/logrus"
-	cachet "github.com/castawaylabs/cachet-monitor"
 	docopt "github.com/docopt/docopt-go"
+	cachet "github.com/milkinteractive/cachet-monitor"
 	"github.com/mitchellh/mapstructure"
+	"github.com/sirupsen/logrus"
 	"gopkg.in/yaml.v2"
 )
 
 const usage = `cachet-monitor
 
 Usage:
-  cachet-monitor (-c PATH | --config PATH) [--log=LOGPATH] [--name=NAME] [--immediate]
+  cachet-monitor (-c PATH | --config PATH) [--log=LOGPATH] [--name=NAME] [--immediate] [--restarted]
   cachet-monitor -h | --help | --version
-  cachet-monitor print-config
 
 Arguments:
   PATH     path to config.json
@@ -39,15 +38,17 @@ Options:
   -h --help                      Show this screen.
   --version                      Show version
   --immediate                    Tick immediately (by default waits for first defined interval)
-  print-config                   Print example configuration
+  --restarted                    Get open incidents before start monitoring (if monitor died or restarted)
   
 Environment varaibles:
   CACHET_API      override API url from configuration
   CACHET_TOKEN    override API token from configuration
   CACHET_DEV      set to enable dev logging`
 
+var version string
+
 func main() {
-	arguments, _ := docopt.Parse(usage, nil, true, "cachet-monitor", false)
+	arguments, _ := docopt.Parse(usage, nil, true, version, false)
 
 	cfg, err := getConfiguration(arguments["--config"].(string))
 	if err != nil {
@@ -58,6 +59,10 @@ func main() {
 		cfg.Immediate = immediate.(bool)
 	}
 
+	if restarted, ok := arguments["--restarted"]; ok {
+		cfg.Restarted = restarted.(bool)
+	}
+
 	if name := arguments["--name"]; name != nil {
 		cfg.SystemName = name.(string)
 	}
@@ -171,25 +176,26 @@ func getConfiguration(path string) (*cachet.CachetMonitor, error) {
 		}
 
 		switch monType {
-		case "http":
+			case "http":
-			var s cachet.HTTPMonitor
+				var s cachet.HTTPMonitor
-			err = mapstructure.Decode(rawMonitor, &s)
+				err = mapstructure.Decode(rawMonitor, &s)
-			t = &s
+				t = &s
-		case "dns":
+			case "dns":
-			var s cachet.DNSMonitor
+				var s cachet.DNSMonitor
-			err = mapstructure.Decode(rawMonitor, &s)
+				err = mapstructure.Decode(rawMonitor, &s)
-			t = &s
+				t = &s
-		case "icmp":
+			case "tcp":
-			var s cachet.ICMPMonitor
+				var s cachet.TCPMonitor
-			err = mapstructure.Decode(rawMonitor, &s)
+				err = mapstructure.Decode(rawMonitor, &s)
-			t = &s
+				t = &s
-		case "tcp":
+			
-			var s cachet.TCPMonitor
+			case "icmp":
-			err = mapstructure.Decode(rawMonitor, &s)
+				var s cachet.ICMPMonitor
-			t = &s
+				err = mapstructure.Decode(rawMonitor, &s)
-		default:
+				t = &s
-			logrus.Errorf("Invalid monitor type (index: %d) %v", index, monType)
+			default:
-			continue
+				logrus.Errorf("Invalid monitor type (index: %d) %v", index, monType)
+				continue
 		}
 
 		t.GetMonitor().Type = monType
@@ -200,7 +206,7 @@ func getConfiguration(path string) (*cachet.CachetMonitor, error) {
 		}
 
 		cfg.Monitors[index] = t
-	}
+		}
 
 	return &cfg, err
 }

config.go

@@ -6,17 +6,19 @@ import (
 	"strings"
 	"time"
 
-	"github.com/Sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 )
 
 type CachetMonitor struct {
 	SystemName  string                   `json:"system_name" yaml:"system_name"`
 	DateFormat  string                   `json:"date_format" yaml:"date_format"`
+	SlackWebhook string                  `json:"slack_webhook" yaml:"slack_webhook"`
 	API         CachetAPI                `json:"api"`
 	RawMonitors []map[string]interface{} `json:"monitors" yaml:"monitors"`
 
 	Monitors  []MonitorInterface `json:"-" yaml:"-"`
 	Immediate bool               `json:"-" yaml:"-"`
+	Restarted bool               `json:"-" yaml:"-"`
 }
 
 // Validate configuration
@@ -87,3 +89,9 @@ func getTemplateData(monitor *AbstractMonitor) map[string]interface{} {
 		"now":        time.Now().Format(monitor.config.DateFormat),
 	}
 }
+
+func MainUrl(cfg *CachetMonitor) string {
+	var url = cfg.API.URL
+	var index = strings.Index(url,"/api/")
+	return url[0:index]
+}

dns.go

@@ -1,5 +1,121 @@
 package cachet
 
+import (
+	"net"
+	"regexp"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/miekg/dns"
+)
+
+type DNSAnswer struct {
+	Regex  string
+	regexp *regexp.Regexp
+	Exact  string
+}
+
 type DNSMonitor struct {
 	AbstractMonitor `mapstructure:",squash"`
+
+	// IP:port format or blank to use system defined DNS
+	DNS string
+
+	// A(default), AAAA, MX, ...
+	Question string
+	question uint16
+
+	Answers []DNSAnswer
+}
+
+func (monitor *DNSMonitor) Validate() []string {
+	errs := monitor.AbstractMonitor.Validate()
+
+	if len(monitor.DNS) == 0 {
+		config, _ := dns.ClientConfigFromFile("/etc/resolv.conf")
+		if len(config.Servers) > 0 {
+			monitor.DNS = net.JoinHostPort(config.Servers[0], config.Port)
+		}
+	}
+
+	if len(monitor.DNS) == 0 {
+		monitor.DNS = "8.8.8.8:53"
+	}
+
+	if len(monitor.Question) == 0 {
+		monitor.Question = "A"
+	}
+	monitor.Question = strings.ToUpper(monitor.Question)
+
+	monitor.question = findDNSType(monitor.Question)
+	if monitor.question == 0 {
+		errs = append(errs, "Could not look up DNS question type")
+	}
+
+	for i, a := range monitor.Answers {
+		if len(a.Regex) > 0 {
+			monitor.Answers[i].regexp, _ = regexp.Compile(a.Regex)
+		}
+	}
+
+	return errs
+}
+
+func (monitor *DNSMonitor) test() bool {
+	m := new(dns.Msg)
+	m.SetQuestion(dns.Fqdn(monitor.Target), monitor.question)
+	m.RecursionDesired = true
+
+	c := new(dns.Client)
+	r, _, err := c.Exchange(m, monitor.DNS)
+	if err != nil {
+		logrus.Warnf("DNS error: %v", err)
+		return false
+	}
+
+	if r.Rcode != dns.RcodeSuccess {
+		return false
+	}
+
+	for _, check := range monitor.Answers {
+		found := false
+		for _, answer := range r.Answer {
+			found = matchAnswer(answer, check)
+			if found {
+				break
+			}
+		}
+
+		if !found {
+			logrus.Warnf("DNS check failed: %v. Not found in any of %v", check, r.Answer)
+			return false
+		}
+	}
+
+	return true
+}
+
+func findDNSType(t string) uint16 {
+	for rr, strType := range dns.TypeToString {
+		if t == strType {
+			return rr
+		}
+	}
+
+	return 0
+}
+
+func matchAnswer(answer dns.RR, check DNSAnswer) bool {
+	fields := []string{}
+	for i := 0; i < dns.NumField(answer); i++ {
+		fields = append(fields, dns.Field(answer, i+1))
+	}
+
+	str := strings.Join(fields, " ")
+
+	if check.regexp != nil {
+		return check.regexp.Match([]byte(str))
+	}
+
+	return str == check.Exact
 }

example.cachet-monitor.service

@@ -0,0 +1,20 @@
+[Unit]
+Description=Cachet Monitor
+After=syslog.target
+After=network.target
+#After=mysqld.service
+#After=postgresql.service
+#After=memcached.service
+#After=redis.service
+
+[Service]
+Type=simple
+User=root
+Group=root
+WorkingDirectory=/root
+ExecStart=/root/cachet-monitor -c /etc/cachet-monitor.yaml
+Restart=always
+Environment=USER=root HOME=/root
+
+[Install]
+WantedBy=multi-user.target

example.config.json

@@ -2,21 +2,70 @@
   "api": {
     "url": "https://demo.cachethq.io/api/v1",
     "token": "9yMHsdioQosnyVK4iCVR",
-    "insecure": true
+    "insecure": false
   },
+  "date_format": "02/01/2006 15:04:05 MST",
   "monitors": [
     {
+      "active": false,
       "name": "google",
-      "url": "https://google.com",
+      "target": "https://google.com",
-      "threshold": 80,
+      "strict": true,
+      "method": "POST",
       "component_id": 1,
-      "interval": 10,
+      "metric_id": 4,
-      "timeout": 5,
+      "template": {
+        "investigating": {
+          "subject": "{{ .Monitor.Name }} - {{ .SystemName }}",
+          "message": "{{ .Monitor.Name }} check **failed** (server time: {{ .now }})\n\n{{ .FailReason }}"
+        },
+        "fixed": {
+          "subject": "I HAVE BEEN FIXED"
+        }
+      },
+      "interval": 1,
+      "timeout": 1,
+      "threshold": 80,
       "headers": {
         "Authorization": "Basic <hash>"
       },
       "expected_status_code": 200,
-      "strict_tls": true
+      "expected_body": "P.*NG"
+    },
+    {
+      "type": "dns",
+      "active": true,
+      "name": "dns",
+      "target": "opnsense.bennetg.dev.",
+      "question": "a",
+      "component_id": 2,
+      "interval": 1,
+      "timeout": 1,
+      "dns": "10.0.0.60:53",
+      "answers": [
+        {
+          "exact": "10.0.0.1"
+        }
+      ]
+    },
+    {
+      "type": "tcp",
+      "name": "TCP",
+      "active": false,
+      "target": "10.0.0.1",
+      "interval": 10,
+      "timeout": 1,
+      "port": "443",
+      "component_id": 4
+    },
+    {
+      "active": true,
+      "type": "icmp",
+      "name": "icmp",
+      "target": "10.0.0.1",
+      "component_id": 4,
+      "interval": 10,
+      "timeout": 3
     }
   ]
 }

example.config.yml

@@ -1,14 +1,70 @@
 api:
+  # cachet url
   url: https://demo.cachethq.io/api/v1
+  # cachet api token
   token: 9yMHsdioQosnyVK4iCVR
+  insecure: false
+# https://golang.org/src/time/format.go#L57
+date_format: 02/01/2006 15:04:05 MST
+slack_webhook: https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX
 monitors:
+  # http monitor example
   - name: google
+    # test url
     target: https://google.com
-    threshold: 80
+    # strict certificate checking for https
+    strict: true
+    # HTTP method
+    method: POST
+
+    # set to update component (either component_id or metric_id are required)
     component_id: 1
-    interval: 10
+    # set to post lag to cachet metric (graph)
-    timeout: 5
+    metric_id: 4
+
+    # custom templates (see readme for details)
+    template:
+      investigating:
+        subject: "{{ .Monitor.Name }} - {{ .SystemName }}"
+        message: "{{ .Monitor.Name }} check **failed** (server time: {{ .now }})\n\n{{ .FailReason }}"
+      fixed:
+        subject: "I HAVE BEEN FIXED"
+
+    # seconds between checks
+    interval: 1
+    # seconds for timeout
+    timeout: 1
+    # If % of downtime is over this threshold, open an incident
+    threshold: 80
+
+    # custom HTTP headers
     headers:
       Authorization: Basic <hash>
+    # expected status code (either status code or body must be supplied)
     expected_status_code: 200
-    strict: true
+    # regex to match body
+    expected_body: "P.*NG"
+  # dns monitor example
+  - name: dns
+    # fqdn
+    target: matej.me.
+    # question type (A/AAAA/CNAME/...)
+    question: mx
+    type: dns
+    # set component_id/metric_id
+    component_id: 2
+    # poll every 1s
+    interval: 1
+    timeout: 1
+    # custom DNS server (defaults to system)
+    dns: 8.8.4.4:53
+    answers:
+      - regex: [1-9] alt[1-9].aspmx.l.google.com.
+      - exact: 10 aspmx2.googlemail.com.
+      - exact: 1 aspmx.l.google.com.
+      - exact: 10 aspmx3.googlemail.com.
+  - name: smtpnine
+    target: smtp.nine.ch
+    type: tcp
+    port: 25
+    component_id: 4

example.upstart.conf

@@ -0,0 +1,14 @@
+description "Cachet Monitor"
+
+start on startup
+
+env USER=root
+env HOME=/root
+
+setuid root
+setgid root
+chdir /root
+
+script
+	exec cachet-monitor -c /cachet-monitor.json --immediate
+end script

go-executable-build.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+package=$1
+if [[ -z "$package" ]]; then
+    echo "usage: $0 <package-name>"
+    exit 1
+fi
+package_name=$package
+
+#the full list of the platforms: https://golang.org/doc/install/source#environment
+platforms=(
+    # "darwin/386"
+    # "darwin/amd64"
+    # "darwin/arm"
+    # "darwin/arm64"
+    # "dragonfly/amd64"
+    # "freebsd/386"
+    # "freebsd/amd64"
+    # "freebsd/arm"
+    # "linux/386"
+    "linux/amd64"
+    # "linux/arm"
+    # "linux/arm64"
+    # "netbsd/386"
+    # "netbsd/amd64"
+    # "netbsd/arm"
+    # "openbsd/386"
+    # "openbsd/amd64"
+    # "openbsd/arm"
+    # "plan9/386"
+    # "plan9/amd64"
+    # "solaris/amd64"
+    # "windows/amd64"
+    # "windows/386"
+)
+
+for platform in "${platforms[@]}"; do
+    platform_split=(${platform//\// })
+    GOOS=${platform_split[0]}
+    GOARCH=${platform_split[1]}
+    output_name=build/$package_name'-'$GOOS'-'$GOARCH
+    if [ $GOOS = "windows" ]; then
+        output_name+='.exe'
+    fi
+
+    env CGO_ENABLED=1 GOOS=$GOOS GOARCH=$GOARCH go build -o $output_name $package
+done

go.mod

@@ -0,0 +1,18 @@
+module github.com/milkinteractive/cachet-monitor
+
+go 1.13
+
+require (
+	github.com/chenjiandongx/yap v0.2.0 // indirect
+	github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect
+	github.com/miekg/dns v1.1.53
+	github.com/mitchellh/mapstructure v1.1.2
+	github.com/prometheus-community/pro-bing v0.1.0 // indirect
+	github.com/sirupsen/logrus v1.9.0
+	github.com/stretchr/objx v0.1.1 // indirect
+	golang.org/x/crypto v0.8.0 // indirect
+	golang.org/x/tools v0.8.0 // indirect
+	golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 // indirect
+	gopkg.in/yaml.v2 v2.2.7
+)

go.sum

@@ -0,0 +1,146 @@
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+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815 h1:bWDMxwH3px2JBh6AyO7hdCn/PkvCZXii8TGj7sbtEbQ=
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+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
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+github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
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+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
+golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.7.0/go.mod h1:P32HKFT3hSsZrRxla30E9HqToFYAQPCMs/zFMBUFqPY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.3.0/go.mod h1:/rWhSS2+zyEVwoJf8YAX6L2f0ntZ7Kn/mGgAWcipA5k=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.8.0 h1:vSDcovVPld282ceKgDimkRSC8kpaH1dgyc9UMzlt84Y=
+golang.org/x/tools v0.8.0/go.mod h1:JxBZ99ISMI5ViVkT1tr6tdNmXeTrcpVSD3vZ1RsRdN4=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

http.go

@@ -1,7 +1,9 @@
 package cachet
 
 import (
+	"crypto/md5"
 	"crypto/tls"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 	"regexp"
@@ -38,11 +40,27 @@ type HTTPMonitor struct {
 	// compiled to Regexp
 	ExpectedBody string `mapstructure:"expected_body"`
 	bodyRegexp   *regexp.Regexp
+
+	// content check
+	ExpectedMd5Sum string `mapstructure:"expected_md5sum"`
+	ExpectedLength int    `mapstructure:"expected_length"`
+
+	// data
+	Data string `mapstructure:"data"`
 }
 
 // TODO: test
 func (monitor *HTTPMonitor) test() bool {
-	req, err := http.NewRequest(monitor.Method, monitor.Target, nil)
+	var req *http.Request
+	var err error
+
+	if monitor.Data != "" {
+		dataBuffer := strings.NewReader(monitor.Data)
+		req, err = http.NewRequest(monitor.Method, monitor.Target, dataBuffer)
+	} else {
+		req, err = http.NewRequest(monitor.Method, monitor.Target, nil)
+	}
+
 	for k, v := range monitor.Headers {
 		req.Header.Add(k, v)
 	}
@@ -67,14 +85,27 @@ func (monitor *HTTPMonitor) test() bool {
 		return false
 	}
 
-	if monitor.bodyRegexp != nil {
+	responseBody, err := ioutil.ReadAll(resp.Body)
-		// check response body
+	responseLength := len(string(responseBody))
-		responseBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
-		if err != nil {
+		monitor.lastFailReason = err.Error()
-			monitor.lastFailReason = err.Error()
+		return false
+	}
+
+	if monitor.ExpectedLength > 0 && responseLength != monitor.ExpectedLength {
+		monitor.lastFailReason = "Expected response body length: " + strconv.Itoa(monitor.ExpectedLength) + ", got: " + strconv.Itoa(responseLength)
+		return false
+	}
+
+	if monitor.ExpectedMd5Sum != "" {
+		sum := fmt.Sprintf("%x", (md5.Sum(responseBody)))
+		if strings.Compare(sum, monitor.ExpectedMd5Sum) != 0 {
+			monitor.lastFailReason = "Expected respsone body MD5 checksum: " + monitor.ExpectedMd5Sum + ", got: " + sum
 			return false
 		}
+	}
 
+	if monitor.bodyRegexp != nil {
 		if !monitor.bodyRegexp.Match(responseBody) {
 			monitor.lastFailReason = "Unexpected body: " + string(responseBody) + ".\nExpected to match: " + monitor.ExpectedBody
 			return false

icmp.go

@@ -1,5 +1,77 @@
+// Thanks go to https://github.com/Soontao/cachet-monitor/blob/master/tcp.go
 package cachet
 
+import (
+	"fmt"
+
+	"github.com/chenjiandongx/yap"
+)
+
+// Investigating template
+var defaultICMPInvestigatingTpl = MessageTemplate{
+	Subject: `{{ .Monitor.Name }} - {{ .SystemName }}`,
+	Message: `{{ .Monitor.Name }} check **failed** (server time: {{ .now }})
+
+{{ .FailReason }}`,
+}
+
+// Fixed template
+var defaultICMPFixedTpl = MessageTemplate{
+	Subject: `{{ .Monitor.Name }} - {{ .SystemName }}`,
+	Message: `**Resolved** - {{ .now }}
+
+Down seconds: {{ .downSeconds }}s`,
+}
+
+// ICMPMonitor struct
 type ICMPMonitor struct {
 	AbstractMonitor `mapstructure:",squash"`
 }
+
+// CheckICMPAlive func
+func CheckICMPAlive(ip string, timeout int) (bool, error) {
+
+	pg, err := yap.NewPinger()
+	if err != nil {
+		defer pg.Close()
+	}
+
+	response := pg.Call(yap.Request{
+		Target:  ip,
+		Count:   1,
+		Timeout: timeout * 1000})
+
+	if response.Error != nil {
+		return false, response.Error
+	} else {
+		return true, nil
+	}
+
+}
+
+// test if it available
+func (m *ICMPMonitor) test() bool {
+	if alive, e := CheckICMPAlive(m.Target, int(m.Timeout)); alive {
+		return true
+	} else {
+		m.lastFailReason = fmt.Sprintf("ICMP check failed: %v", e)
+		return false
+	}
+}
+
+// Validate configuration
+func (m *ICMPMonitor) Validate() []string {
+
+	// set incident temp
+	m.Template.Investigating.SetDefault(defaultICMPInvestigatingTpl)
+	m.Template.Fixed.SetDefault(defaultICMPFixedTpl)
+
+	// super.Validate()
+	errs := m.AbstractMonitor.Validate()
+
+	if m.Target == "" {
+		errs = append(errs, "Target is required")
+	}
+
+	return errs
+}

incident.go

@@ -4,8 +4,9 @@ import (
 	"encoding/json"
 	"fmt"
 	"strconv"
+	"time"
 
-	"github.com/Sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 )
 
 // Incident Cachet data model
@@ -14,13 +15,39 @@ type Incident struct {
 	Name    string `json:"name"`
 	Message string `json:"message"`
 	Status  int    `json:"status"`
-	Visible int    `json"visible"`
+	Visible int    `json:"visible"`
 	Notify  bool   `json:"notify"`
 
 	ComponentID     int `json:"component_id"`
 	ComponentStatus int `json:"component_status"`
 }
 
+//Get the last still open incident
+func (mon *AbstractMonitor) Get(cfg *CachetMonitor) (*Incident, error) {
+	requestType := "GET"
+	requestURL := fmt.Sprintf("/incidents?component_id=%d", mon.ComponentID)
+	_, body, err := cfg.API.NewRequest(requestType, requestURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	data := make([]Incident, 0)
+	if err := json.Unmarshal(body.Data, &data); err != nil {
+		return nil, fmt.Errorf("Cannot parse incident body: %v, %v", err, string(body.Data))
+	}
+	//filter out resolved incidents
+	openIncidents := make([]Incident, 0)
+	for _, i := range data {
+		if i.Status < 4 {
+			openIncidents = append(openIncidents, i)
+		}
+	}
+	if len(openIncidents) == 0 {
+		return nil, nil
+	}
+	return &openIncidents[0], nil
+
+}
+
 // Send - Create or Update incident
 func (incident *Incident) Send(cfg *CachetMonitor) error {
 	switch incident.Status {
@@ -65,9 +92,12 @@ func (incident *Incident) Send(cfg *CachetMonitor) error {
 
 	incident.ID = data.ID
 	if resp.StatusCode != 200 {
-		return fmt.Errorf("Could not create/update incident!")
+		return fmt.Errorf("Could not create/update incident")
+	}
+	// send slack message
+	if cfg.SlackWebhook != "" {
+		incident.sendSlack(cfg)
 	}
-
 	return nil
 }
 
@@ -110,3 +140,30 @@ func (incident *Incident) SetWatching() {
 func (incident *Incident) SetFixed() {
 	incident.Status = 4
 }
+
+// Send slack message
+func (incident *Incident) sendSlack(cfg *CachetMonitor) {
+	color := "#bf1932" //red
+	if incident.ComponentStatus == 1 {
+		color = "#36a64f" //green
+	}
+	titleLink := MainUrl(cfg) + "/dashboard/incidents/" + strconv.Itoa(incident.ID)
+	slack := Slack{
+		WebhookURL: cfg.SlackWebhook,
+		Attachments: []Attachments{
+			Attachments{
+				Fallback:   incident.Name,
+				Color:      color,
+				Title:      incident.Name,
+				TitleLink:  titleLink,
+				Text:       incident.Message,
+				Footer:     "Cachet Monitor",
+				FooterIcon: "https://i.imgur.com/spck1w6.png",
+				Ts:         time.Now().Unix(),
+			},
+		}}
+	err := slack.SendSlackNotification()
+	if err != nil {
+		fmt.Errorf("Cannot send slack message. Err = %v", err)
+	}
+}

monitor.go

@@ -4,7 +4,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/Sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 )
 
 const DefaultInterval = time.Second * 60
@@ -27,8 +27,9 @@ type MonitorInterface interface {
 type AbstractMonitor struct {
 	Name   string
 	Target string
+	Active bool
 
-	// (default)http, tcp, dns, icmp
+	// (default)http / dns
 	Type   string
 	Strict bool
 
@@ -50,10 +51,10 @@ type AbstractMonitor struct {
 
 	// lag / average(lagHistory) * 100 = percentage above average lag
 	// PerformanceThreshold sets the % limit above which this monitor will trigger degraded-performance
-	PerformanceThreshold float32
+	// PerformanceThreshold float32
 
-	history        []bool
+	history []bool
-	lagHistory     []float32
+	// lagHistory     []float32
 	lastFailReason string
 	incident       *Incident
 	config         *CachetMonitor
@@ -107,10 +108,17 @@ func (mon *AbstractMonitor) Describe() []string {
 		features = append(features, "Name: "+mon.Name)
 	}
 
+	if !mon.Active {
+		features = append(features, "Active: No")
+	}
+
 	return features
 }
 
 func (mon *AbstractMonitor) ClockStart(cfg *CachetMonitor, iface MonitorInterface, wg *sync.WaitGroup) {
+	if !mon.Active {
+		return
+	};
 	wg.Add(1)
 	mon.config = cfg
 	mon.stopC = make(chan bool)
@@ -118,6 +126,16 @@ func (mon *AbstractMonitor) ClockStart(cfg *CachetMonitor, iface MonitorInterfac
 		mon.tick(iface)
 	}
 
+	if cfg.Restarted {
+		initialIncident, err := mon.Get(cfg)
+		if err != nil {
+			logrus.Warn("could not fetch initial incident: %v", err)
+		}
+		if initialIncident != nil {
+			mon.incident = initialIncident
+		}
+	}
+
 	ticker := time.NewTicker(mon.Interval * time.Second)
 	for {
 		select {
@@ -141,7 +159,6 @@ func (mon *AbstractMonitor) ClockStop() {
 
 func (mon *AbstractMonitor) test() bool { return false }
 
-// TODO: test
 func (mon *AbstractMonitor) tick(iface MonitorInterface) {
 	reqStart := getMs()
 	up := iface.test()
@@ -153,7 +170,7 @@ func (mon *AbstractMonitor) tick(iface MonitorInterface) {
 	}
 
 	if len(mon.history) == histSize-1 {
-		logrus.Warnf("%v is now saturated\n", mon.Name)
+		logrus.Warnf("%v is now saturated", mon.Name)
 	}
 	if len(mon.history) >= histSize {
 		mon.history = mon.history[len(mon.history)-(histSize-1):]

monitor_test.go

@@ -0,0 +1,7 @@
+package cachet
+
+import (
+	"testing"
+)
+
+func TestAnalyseData(t *testing.T) {}

readme.md

@@ -1,123 +1,212 @@
-![screenshot](https://castawaylabs.github.io/cachet-monitor/screenshot.png)
+# cachet-monitor
 
-Features
+a fork of the cachet-monitor project originally developed by CastawayLabs but abandoned. Extended with new features needed by the people.
---------
 
-- [x] Creates & Resolves Incidents
+## Features
-- [x] Check URLs by response code and/or body contents
-- [x] Posts monitor lag to cachet graphs
-- [x] Updates Component to Partial Outage
-- [x] Updates Component to Major Outage if already in Partial Outage (works well with distributed monitoring)
-- [x] Can be run on multiple servers and geo regions
 
-Configuration
+:heavy_check_mark: Interval based checking of predefined Resources  
--------------
+:heavy_check_mark: Posts monitor lag to cachet graphs  
+:heavy_check_mark: Creates & Resolves Incidents  
+:heavy_check_mark: Updates Component to Partial Outage  
+:heavy_check_mark: Updates Component to Major Outage if already in Partial Outage (works with distributed monitors)  
+:heavy_check_mark: Can be run on multiple servers and geo regions  
+:heavy_check_mark: HTTP Checks (body/status code)  
+:heavy_check_mark: DNS Checks  
+:heavy_check_mark: TCP Checks  
+:heavy_check_mark: ICMP Checks
 
-```
+## Quick Start
+
+Configuration can be done in either yaml or json format. An example JSON-File would look something like this:
+
+```json
 {
-  // URL for the API. Note: Must end with /api/v1
+  "api": {
-  "api_url": "https://<cachet domain>/api/v1",
+    "url": "https://demo.cachethq.io/api/v1",
-  // Your API token for Cachet
+    "token": "9yMHsdioQosnyVK4iCVR",
-  "api_token": "<cachet api token>",
+    "insecure": false
-  // optional, false default, set if your certificate is self-signed/untrusted
+  },
-  "insecure_api": false,
+  "date_format": "02/01/2006 15:04:05 MST",
-  "monitors": [{
+  "monitors": [
-    // required, friendly name for your monitor
+    {
-    "name": "Name of your monitor",
+      "active": false,
-    // required, url to probe
+      "name": "google",
-    "url": "Ping URL",
+      "target": "https://google.com",
-    // optional, http method (defaults GET)
+      "strict": true,
-    "method": "get",
+      "method": "POST",
-    // optional, http Headers to add (default none)
+      "component_id": 1,
-    "headers": [
+      "metric_id": 4,
-        // specify Name and Value of Http-Header, eg. Authorization
+      "template": {
-        { "name": "Authorization", "value": "Basic <hash>" }
+        "investigating": {
-    ],
+          "subject": "{{ .Monitor.Name }} - {{ .SystemName }}",
-    // self-signed ssl certificate
+          "message": "{{ .Monitor.Name }} check **failed** (server time: {{ .now }})\n\n{{ .FailReason }}"
-    "strict_tls": true,
+        },
-    // seconds between checks
+        "fixed": {
-    "interval": 10,
+          "subject": "I HAVE BEEN FIXED"
-    // seconds for http timeout
+        }
-    "timeout": 5,
+      },
-    // post lag to cachet metric (graph)
+      "interval": 1,
-    // note either metric ID or component ID are required
+      "timeout": 1,
-    "metric_id": <metric id>,
+      "threshold": 80,
-    // post incidents to this component
+      "headers": {
-    "component_id": <component id>,
+        "Authorization": "Basic <hash>"
-    // If % of downtime is over this threshold, open an incident
+      },
-    "threshold": 80,
+      "expected_status_code": 200,
-    // optional, expected status code (either status code or body must be supplied)
+      "expected_body": "P.*NG"
-    "expected_status_code": 200,
+    }
-    // optional, regular expression to match body content
+  ]
-    "expected_body": "P.*NG"
-  }],
-  // optional, system name to identify bot (uses hostname by default)
-  "system_name": "",
-  // optional, defaults to stdout
-  "log_path": ""
 }
 ```
 
-Installation
+## Installation
-------------
 
-1. Download binary from [release page](https://github.com/CastawayLabs/cachet-monitor/releases)
+1. Download binary from [release page](https://github.com/bennetgallein/cachet-monitor/releases)
-2. Create your configuration ([example](https://raw.githubusercontent.com/CastawayLabs/cachet-monitor/master/example.config.json))
+2. Add the binary to an executable path (/usr/bin, etc.)
-3. `cachet-monitor -c /etc/cachet-monitor.config.json`
+3. Create a configuration following provided examples
+4. `cachet-monitor -c /etc/cachet-monitor.json`
 
-pro tip: run in background using `nohup cachet-monitor 2>&1 > /var/log/cachet-monitor.log &`
+pro tip: run in background using `nohup cachet-monitor 2>&1 > /var/log/cachet-monitor.log &`, or use a tmux/screen session
 
 ```
-Usage of cachet-monitor:
+Usage:
-  -c="/etc/cachet-monitor.config.json": Config path
+  cachet-monitor (-c PATH | --config PATH) [--log=LOGPATH] [--name=NAME] [--immediate]
-  -log="": Log path
+  cachet-monitor -h | --help | --version
-  -name="": System Name
+
+Arguments:
+  PATH     path to config.json
+  LOGPATH  path to log output (defaults to STDOUT)
+  NAME     name of this logger
+
+Examples:
+  cachet-monitor -c /root/cachet-monitor.json
+  cachet-monitor -c /root/cachet-monitor.json --log=/var/log/cachet-monitor.log --name="development machine"
+
+Options:
+  -c PATH.json --config PATH     Path to configuration file
+  -h --help                      Show this screen.
+  --version                      Show version
+  --immediate                    Tick immediately (by default waits for first defined interval)
+  --restarted                    Get open incidents before start monitoring (if monitor died or restarted)
+
+Environment varaibles:
+  CACHET_API      override API url from configuration
+  CACHET_TOKEN    override API token from configuration
+  CACHET_DEV      set to enable dev logging
 ```
 
-Environment variables
+## Init script
----------------------
 
-| Name         | Example Value                  | Description                 |
+If your system is running systemd (like Debian, Ubuntu 16.04, Fedora, RHEL7, or Archlinux) you can use the provided example file: [example.cachet-monitor.service](https://github.com/bennetgallein/cachet-monitor/blob/master/example.cachet-monitor.service).
-| ------------ | ------------------------------ | --------------------------- |
-| CACHET_API   | http://demo.cachethq.io/api/v1 | URL endpoint for cachet api |
-| CACHET_TOKEN | APIToken123                    | API Authentication token    |
-| CACHET_DEV   | 1                              | Strips logging              |
 
-Vision and goals
+1. Simply put it in the right place with `cp example.cachet-monitor.service /etc/systemd/system/cachet-monitor.service`
-----------------
+2. Then do a `systemctl daemon-reload` in your terminal to update Systemd configuration
+3. Finally you can start cachet-monitor on every startup with `systemctl enable cachet-monitor.service`! 👍
+
+## Templates
+
+This package makes use of [`text/template`](https://godoc.org/text/template). [Default HTTP template](https://github.com/CastawayLabs/cachet-monitor/blob/master/http.go#L14)
+
+The following variables are available:
+
+| Root objects  | Description                         |
+| ------------- | ----------------------------------- |
+| `.SystemName` | system name                         |
+| `.API`        | `api` object from configuration     |
+| `.Monitor`    | `monitor` object from configuration |
+| `.now`        | formatted date string               |
+
+| Monitor variables |
+| ----------------- |
+| `.Name`           |
+| `.Target`         |
+| `.Type`           |
+| `.Strict`         |
+| `.MetricID`       |
+| ...               |
+
+All monitor variables are available from `monitor.go`
+
+## Monitor Types
+
+We support a variety of monitor-types. Here are the configuration parameters for each of them
+
+Also, the following parameters are shared for all monitors.
+
+| Key                     | Description                                                                    |
+| ----------------------- | ------------------------------------------------------------------------------ |
+| name                    | a friendly name for the monitor                                                |
+| target                  | target for the check (e.g. a domain or IP)                                     |
+| active                  | a boolean wether or not this test is currently active                          |
+| type                    | type type of the check, see supported types above or below                     |
+| interval                | the interval in seconds in which to check the monitor                          |
+| timeout                 | the timeout for each check. Needs to be smaller than the interval              |
+| metric_id               | the ID of the metric. Metrics are used for graphing values                     |
+| component_id            | the ID of the component inside of Cachet. Used for creating incidents          |
+| templates.investigating | template to use as a message for when the check enters the investigating stage |
+| templates.fixed         | template to use as a message for when the check enters the fixed stage         |
+| threshold               | If % of downtime is over this threshold, open an incident                      |
+| threshold_count         | the number of checks that count into the threshold (defaults to 10)            |
+
+### HTTP
+
+Either expected_body or expected_status_code needs to be set.
+
+| Key                  | Description                                                                                 |
+| -------------------- | ------------------------------------------------------------------------------------------- |
+| method               | the HTTP Request method to use (Defaults to GET)                                            |
+| headers              | a key-value array of additional headers to use for the request                              |
+| expected_status_code | the expected status-code returned from the request                                          |
+| expected_body        | a regex or normal string that will be used to test against the returned body of the request |
+| expected_md5sum      | a md5 checksum of the body, which will be checked against                                   |
+| expected_length      | the length of the string of the response body                                               |
+| data                 | body-data for a post request                                                                |
+
+### DNS
+
+| Key      | Description                                                                                          |
+| -------- | ---------------------------------------------------------------------------------------------------- |
+| dns      | set a custom DNS-Resolver (IP:Port format)                                                           |
+| question | the type of DNS-Request to execute (e.g. A, MX, CNAME...). Can also be a List (['A', 'MX', 'CNAME']) |
+| answers  | an array of response objects. see below                                                              |
+
+#### Answer Object
+
+| Key   | Description                                                           |
+| ----- | --------------------------------------------------------------------- |
+| regex | if you want to use a regexp, use this key and the regexp as the value |
+| exact | exact match for the response value                                    |
+
+### TCP
+
+| Key  | Description                        |
+| ---- | ---------------------------------- |
+| port | the port to do a tcp connection to |
+
+### ICMP
+
+_No special variables needed_
+
+## Vision and goals
 
 We made this tool because we felt the need to have our own monitoring software (leveraging on Cachet).
 The idea is a stateless program which collects data and pushes it to a central cachet instance.
 
 This gives us power to have an army of geographically distributed loggers and reveal issues in both latency & downtime on client websites.
 
-Package usage
+## Package usage
--------------
 
-When using `cachet-monitor` as a package in another program, you should follow what `cli/main.go` does. It is important to call `ValidateConfiguration` on `CachetMonitor` and all the monitors inside.
+When using `cachet-monitor` as a package in another program, you should follow what `cli/main.go` does. It is important to call `Validate` on `CachetMonitor` and all the monitors inside.
 
 [API Documentation](https://godoc.org/github.com/CastawayLabs/cachet-monitor)
 
-## License
+# Contributions welcome
 
-MIT License
+We'll happily accept contributions for anything usefull.
 
-Copyright (c) 2016 Castaway Labs LLC
+# Build on Linux/MacOS
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
+1. Read and install with https://ahmadawais.com/install-go-lang-on-macos-with-homebrew/
-of this software and associated documentation files (the "Software"), to deal
+2. Test in console with `go get -u` and `go build cli/main.go`
-in the Software without restriction, including without limitation the rights
+3. Run `./go-executable-build.sh cli/main.go`
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+4. This will create a `build/cli/main.go-linux-amd64`-file, which is the executable binary
-copies of the Software, and to permit persons to whom the Software is
+5. `mv build/cli/main.go-linux-amd64 /usr/bin/cachet-monitor`
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

slack.go

@@ -0,0 +1,80 @@
+package cachet
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"log"
+	"net/http"
+	"time"
+)
+
+type Slack struct {
+	WebhookURL  string
+	Attachments []Attachments `json:"attachments"`
+}
+type Fields struct {
+	Title string `json:"title"`
+	Value string `json:"value"`
+	Short bool   `json:"short"`
+}
+type Attachments struct {
+	Fallback   string   `json:"fallback"`
+	Color      string   `json:"color"`
+	Pretext    string   `json:"pretext"`
+	Title      string   `json:"title"`
+	TitleLink  string   `json:"title_link"`
+	Text       string   `json:"text"`
+	Fields     []Fields `json:"fields"`
+	ThumbURL   string   `json:"thumb_url"`
+	Footer     string   `json:"footer"`
+	FooterIcon string   `json:"footer_icon"`
+	Ts         int64    `json:"ts"`
+}
+
+func test() {
+	slack := Slack{
+		Attachments: []Attachments{
+			Attachments{
+				Fallback:   "Required plain-text summary of the attachment.",
+				Color:      "#36a64f",
+				Title:      "Slack API Documentation",
+				TitleLink:  "https://status.easyship.com",
+				Text:       "Optional text that appears within the attachment",
+				Footer:     "Cachet Monitor",
+				FooterIcon: "https://i.imgur.com/spck1w6.png",
+				Ts:         time.Now().Unix(),
+			},
+		}}
+	slack.WebhookURL = "https://hooks.slack.com/services/0000000/00000000/xxxxxxxxxxxxxxxxxxx"
+	err := slack.SendSlackNotification()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+// SendSlackNotification will post to an 'Incoming Webook' url setup in Slack Apps. It accepts
+// some text and the slack channel is saved within Slack.
+func (slack *Slack) SendSlackNotification() error {
+
+	slackBody, _ := json.Marshal(slack)
+	req, err := http.NewRequest(http.MethodPost, slack.WebhookURL, bytes.NewBuffer(slackBody))
+	if err != nil {
+		return err
+	}
+
+	req.Header.Add("Content-Type", "application/json")
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(resp.Body)
+	if buf.String() != "ok" {
+		return errors.New("Non-ok response returned from Slack")
+	}
+	return nil
+}

tcp.go

@@ -1,15 +1,76 @@
+// Thanks go to https://github.com/Soontao/cachet-monitor/blob/master/tcp.go
 package cachet
 
+import (
+	"fmt"
+	"net"
+	"time"
+)
+
+// Investigating template
+var defaultTCPInvestigatingTpl = MessageTemplate{
+	Subject: `{{ .Monitor.Name }} - {{ .SystemName }}`,
+	Message: `{{ .Monitor.Name }} check **failed** (server time: {{ .now }})
+
+{{ .FailReason }}`,
+}
+
+// Fixed template
+var defaultTCPFixedTpl = MessageTemplate{
+	Subject: `{{ .Monitor.Name }} - {{ .SystemName }}`,
+	Message: `**Resolved** - {{ .now }}
+
+Down seconds: {{ .downSeconds }}s`,
+}
+
+// TCPMonitor struct
 type TCPMonitor struct {
 	AbstractMonitor `mapstructure:",squash"`
-
+	Port            string
-	// same as output from net.JoinHostPort
+}
-	// defaults to parsed config from /etc/resolv.conf when empty
+
-	DNSServer string
+// CheckTCPPortAlive func
-
+func CheckTCPPortAlive(ip, port string, timeout int64) (bool, error) {
-	// Will be converted to FQDN
+
-	Domain string
+	conn, err := net.DialTimeout("tcp", net.JoinHostPort(ip, port), time.Duration(timeout)*time.Second)
-	Type   string
+	if conn != nil {
-	// expected answers (regex)
+		defer conn.Close()
-	Expect []string
+	}
+	if err != nil {
+		return false, err
+	} else {
+		return true, nil
+	}
+
+}
+
+// test if it available
+func (m *TCPMonitor) test() bool {
+	if alive, e := CheckTCPPortAlive(m.Target, m.Port, int64(m.Timeout)); alive {
+		return true
+	} else {
+		m.lastFailReason = fmt.Sprintf("TCP check failed: %v", e)
+		return false
+	}
+}
+
+// Validate configuration
+func (m *TCPMonitor) Validate() []string {
+
+	// set incident temp
+	m.Template.Investigating.SetDefault(defaultTCPInvestigatingTpl)
+	m.Template.Fixed.SetDefault(defaultTCPFixedTpl)
+
+	// super.Validate()
+	errs := m.AbstractMonitor.Validate()
+
+	if m.Target == "" {
+		errs = append(errs, "Target is required")
+	}
+
+	if m.Port == "" {
+		errs = append(errs, "Port is required")
+	}
+
+	return errs
 }