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Introduction

Get Slack Notifications, When Containers Run Into Issues

Read more: https://www.dennyzhang.com/docker_monitor

General Idea

1. Start a container in the target docker host.
2. This container will query status for all containers.

curl -XGET --unix-socket /var/run/docker.sock http://localhost/containers/json

3. Send slack notifications, we get matched of "unhealthy"

How To Use: Plain Container

• Specify slack credentials via env

export SLACK_CHANNEL="#XXX"
export SLACK_USERNAME="XXX"
export SLACK_TOKEN="xoxp-XXX-XXX-XXX-XXXXXXXX"
export MSG_PREFIX="Monitoring On XX.XX.XX.XX"

• Start container to check

container_name="monitor-docker-slack"
# Stop and delete existing container
docker stop $container_name; docker rm "$container_name"

# Start container to monitor docker healthcheck status
docker run -v /var/run/docker.sock:/var/run/docker.sock \
   -t -d -h $container_name --name $container_name \
   -e SLACK_CHANNEL="$SLACK_CHANNEL" -e SLACK_USERNAME="$SLACK_USERNAME" \
   -e SLACK_TOKEN="$SLACK_TOKEN" -e MSG_PREFIX="$MSG_PREFIX" \
   -e WHITE_LIST="$WHITE_LIST" --restart=always \
   denny/monitor-docker-slack:latest

# Check status
docker logs "$container_name"

How To Use: Docker-compose

version: '2'
services:
  monitor-docker-slack:
    container_name: monitor-docker-slack
    image: denny/monitor-docker-slack:latest
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock
    environment:
      SLACK_CHANNEL: "#XXX"
      SLACK_USERNAME: "XXX"
      SLACK_TOKEN: "xoxp-XXX-XXX-XXX-XXXXXXXX"
      MSG_PREFIX: "Monitoring On XX.XX.XX.XX"
    restart: always

More customization

• Add message prefix for the slack notification

export MSG_PREFIX="Docker Env in Denny's env"

<a href="https://www.dennyzhang.com"><img src="https://raw.githubusercontent.com/DennyZhang/monitor-docker-slack/master/images/slack_prefix.png"/> </a>

• Skip checking certain containers by customizing WHITE_LIST env.

export MSG_PREFIX="Docker Env in Denny's env"
export WHITE_LIST="nodeexporter,ngin.*"

<a href="https://www.dennyzhang.com"><img src="https://raw.githubusercontent.com/DennyZhang/monitor-docker-slack/master/images/slack_whitelist.png"/> </a>

Code is licensed under MIT License.