add docker-compose for monitor

monitor/.env.example

@@ -0,0 +1,21 @@
+# DOCKER IMAGE
+MONITOR_DOCKER_IMAGE_VERSION="v0.0.1"
+
+#
+# DO S3 ACCESS
+#
+S3_ACCESS_KEY_ID="<KEY_ID>"
+S3_SECRET_ACCESS_KEY="<SECRET KEY>"
+S3_BUCKET="jemo"
+S3_ENDPOINT="https://sgp1.digitaloceanspaces.com"
+# S3_PREFIX="wiki/testing"
+S3_PREFIX="wiki/production"
+
+
+# NOTIFICATION CHANNEL 
+DISCORD_NOTIFICATION_URL="<DISCORD NOTIFICATION URL>"
+
+# 
+# CRON FREQ
+# CHECK EVERY 45 MINUTES
+CRON_MONITOR_TIME="*/45 * * * *"

monitor/README.md

@@ -0,0 +1,23 @@
+= Tamil Wiki Backup Monitoring
+
+Tamil wiki database and images are backed up every hour through a cron job. Daily, weekly, monthly backups are also maintained. There has been instances where the backup failed to run. This monitor is to check s3 for the latest backups uploaded and alert if the houly backup is delayed for more than 1.5 hours.
+
+== Build
+
+```
+docker build -t tamilwiki/monitor:v0.0.1 .
+```
+
+This will build the docker image, with tag `v0.0.1`. This version should be used within the `.env` file, as the value for `MONITOR_DOCKER_IMAGE_VERSION`. 
+
+== Run
+
+1. Update the `.env.example` with the right values
+2. Rename `.env.example` to `.env` within the `monitor` folder
+3. Do not mutate the `.env` file in any other folder, especially if you have `compose-deployment`
+4. Start the container from `monitor` folder 
+
+```
+docker-compose up -d
+```
+

monitor/cron_monitor.sh

@@ -51,7 +51,7 @@ sql_backup_delayed=$(echo "$hours_since_sql_dump > $minimum_backup_time_requirem
 
 # if not, notify 
 if [[ $((mediawiki_backup_delayed + sql_backup_delayed)) > 0 ]] ; then 
-    curl -X POST $DISCORD_NOTIFICATION_URL -H 'Content-Type: application/json' -d '{"embeds":[{"color":"14365807","title":"MediaWiki Backup","type":"rich","description":"Backup Cron Testing","fields":[{"name":"Mediawiki Backup Time","value":"'"$hours_since_mediawiki_dump hours ago"'"},{"name":"DB Bakup Time","value":"'"$hours_since_sql_dump hours ago"'"},{"name":"frequency","value":"hourly"},{"name":"S3 Bucket","value":"'"$S3_PREFIX"'"}]}]}'
+    curl -X POST $DISCORD_NOTIFICATION_URL -H 'Content-Type: application/json' -d '{"embeds":[{"color":"14365807","title":"MediaWiki Backup","type":"rich","description":"Hourly Backup Failed","fields":[{"name":"Mediawiki Backup Time","value":"'"$hours_since_mediawiki_dump hours ago"'"},{"name":"DB Bakup Time","value":"'"$hours_since_sql_dump hours ago"'"},{"name":"frequency","value":"hourly"},{"name":"S3 Bucket","value":"'"$S3_PREFIX"'"}]}]}'
     echo "Notified the delay in backup cron"
 else 
     echo "No delay in hourly backup. Hence, no notification sent."

monitor/docker-compose.yml

@@ -0,0 +1,34 @@
+version: '2.4'
+
+networks:
+  # This networks defined in main yaml docker-compose.yml file
+  # Since both are refering common project the network defined here will refer the same.
+  default:
+    ipam:
+      driver: default
+
+# YAML aliases
+x-default: &default
+  dns:
+    - 1.1.1.1
+    - 1.0.0.1
+
+services:
+
+  monitor:
+    <<: *default
+    image: tamilwiki/monitor:${MONITOR_DOCKER_IMAGE_VERSION}
+    restart: on-failure
+    mem_limit: 128M
+    mem_reservation: 64M    
+    environment:
+      DISCORD_NOTIFICATION_URL: ${DISCORD_NOTIFICATION_URL}
+      CRON_MONITOR_TIME: ${CRON_MONITOR_TIME}      
+      S3_ACCESS_KEY_ID: ${S3_ACCESS_KEY_ID}
+      S3_BUCKET: ${S3_BUCKET}
+      S3_ENDPOINT: ${S3_ENDPOINT}
+      S3_LIFECYCLE_EXPIRATION_DAYS: ${S3_LIFECYCLE_EXPIRATION_DAYS}
+      S3_PREFIX: ${S3_PREFIX}
+      S3_SECRET_ACCESS_KEY: ${S3_SECRET_ACCESS_KEY}
+    networks:
+      - default