From b22ff9f6ae63fe1d67dbbd2a36d88d78650b67c2 Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@tobru.ch>
Date: Sun, 28 Jul 2019 13:44:50 +0200
Subject: [PATCH] simple healthchecks.io monitoring

cleanup unused checkup monitoring
---
 README.md                         | 16 +++++++++++
 checkup.json.example              | 44 -------------------------------
 contrib/healthchecks-cronjob.yaml | 29 ++++++++++++++++++++
 docker-compose.yml                |  8 ------
 monitoring/Dockerfile             |  7 -----
 5 files changed, 45 insertions(+), 59 deletions(-)
 delete mode 100644 checkup.json.example
 create mode 100644 contrib/healthchecks-cronjob.yaml
 delete mode 100644 monitoring/Dockerfile

diff --git a/README.md b/README.md
index cf4756d..cb3bac3 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,22 @@ Continue with "Odoo PoS configuration"
 
 More hardware description and a network diagram: tbd.
 
+## Monitoring
+
+There are two kinds of monitoring prepared: The cluster itself and the PoS
+application.
+
+### Simple Cluster Healthcheck
+
+Under `contrib/healthchecks-cronjob.yaml` a simple Kubernetes cronjob is
+provided which regularly pings [Healthchecks.io](https://healthchecks.io/).
+
+A secret with the ping URL needs to be added before the CronJobs does it's work:
+
+```
+kubectl -n hc create secret generic healthchecks-io --from-literal=HCURL=https://hc-ping.com/MYUUID
+```
+
 ## Backup configuration
 
 Example contents of `backup.env`:
diff --git a/checkup.json.example b/checkup.json.example
deleted file mode 100644
index 486f984..0000000
--- a/checkup.json.example
+++ /dev/null
@@ -1,44 +0,0 @@
-{
-	"checkers": [
-		{
-			"type": "http",
-			"endpoint_name": "Mikrotik Access Point",
-			"endpoint_url": "http://192.168.233.1"
-		},
-		{
-			"type": "http",
-			"endpoint_name": "Odoo",
-			"endpoint_url": "http://10.5.0.2:8069"
-		},
-		{
-			"type": "http",
-			"endpoint_name": "PosBox",
-			"endpoint_url": "http://10.5.0.3:8069"
-		},
-		{
-			"type": "tcp",
-			"endpoint_name": "Printer 1",
-			"endpoint_url": "192.168.233.3:80"
-		},
-		{
-			"type": "tcp",
-			"endpoint_name": "Printer 2",
-			"endpoint_url": "192.168.233.5:80"
-		},
-		{
-			"type": "tcp",
-			"endpoint_name": "PoS Tablet",
-			"endpoint_url": "192.168.233.49:80"
-		}
-	],
-	"storage": {
-		"provider": "github",
-                "access_token": "HIDDEN",
-                "repository_owner": "tobru",
-                "repository_name": "fwu-pos-statuspage",
-                "committer_name": "Checkup on PoS",
-                "committer_email": "pos@feuerwehrurdorf.ch",
-                "branch": "gh-pages",
-                "dir": "updates"
-	}
-}
diff --git a/contrib/healthchecks-cronjob.yaml b/contrib/healthchecks-cronjob.yaml
new file mode 100644
index 0000000..f8763e6
--- /dev/null
+++ b/contrib/healthchecks-cronjob.yaml
@@ -0,0 +1,29 @@
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: healthchecks-io
+  namespace: hc
+spec:
+  schedule: "*/1 * * * *"
+  concurrencyPolicy: Forbid
+  successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: pinghc
+            env:
+            - name: HCURL
+              valueFrom:
+                secretKeyRef:
+                  name: healthchecks-io
+                  key: HCURL
+            image: busybox
+            args:
+            - /bin/sh
+            - -c
+            - "date && echo $HCURL && /bin/wget -q -O - --no-check-certificate $HCURL"
+          restartPolicy: OnFailure
+
diff --git a/docker-compose.yml b/docker-compose.yml
index e0faa71..5414f85 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -62,14 +62,6 @@ services:
 #    networks:
 #      localnet:
 #        ipv4_address: 10.5.0.5
-#  monitoring:
-#    build: ./monitoring
-#    command: checkup every 10m
-#    volumes:
-#      - ./checkup.json:/opt/checkup/checkup.json:ro
-#    networks:
-#      localnet:
-#        ipv4_address: 10.5.0.6
 volumes:
   odoo-web-data:
   odoo-db-data:
diff --git a/monitoring/Dockerfile b/monitoring/Dockerfile
deleted file mode 100644
index 6ddf4c1..0000000
--- a/monitoring/Dockerfile
+++ /dev/null
@@ -1,7 +0,0 @@
-FROM golang:1.10-alpine
-
-RUN set -x; apk add --no-cache git build-base && \
-    go get -v -u github.com/sourcegraph/checkup/cmd/checkup && \
-    mkdir -p /opt/checkup
-
-WORKDIR /opt/checkup