Way to run commands and deploy services in docker swarm stack.

deploy-and-wait.sh

#!/bin/bash
#
# Update whole docker swarm stack from CI job and wait untill success. 
# Inits rollback process in case of unsuccessfull deployment.
#
# Requires another script from here: https://github.com/sudo-bmitch/docker-stack-wait 
#
# By: Alexey Chudin <kazqvaizer@gmail.com>
# License: MIT
#
# Example:
# 
# ssh SERVER "/srv/deploy-and-wait.sh STACK_NAME"
#

set -e  # die on error

STACK_NAME=$1

if [ "$STACK_NAME" == "" ]; then
    echo "Please, specify first argument as your stack name."
    exit
fi

if [ "$CIRCLE_SHA1" == "" ]; then
    echo "Environment variable CI_SHA1 is required."
    exit
fi

cd /srv/$STACK_NAME

cp docker-compose.prod.yml docker-compose.prod.yml.previous

envsubst < docker-compose.skel.yml > docker-compose.prod.yml

docker stack deploy -c docker-compose.prod.yml $STACK_NAME --with-registry-auth

/srv/docker-stack-wait.sh -t 600 $STACK_NAME

example.skel.yml

# WARNING! Never edit docker-compose.prod.yml directly, because it could be rewritten.
# Edit docker-compose.skel.yml instead.
# 
# That is an example skeleton of stack that works with deploy-and-wait.sh
# 
# CI_SHA1 environment variable will be substituted with actual docker image tag and
# stored in example.prod.yml to allow docker-stack-wait.sh to work with rollbacks
#

version: '3.8'

services:
  app:
    image: DOCKER_IMAGE:${CI_SHA1}

    env_file: &env_file
      - ./env

    # The total time of all checks must be lower then update_config.monitor param
    healthcheck: &healthcheck
      interval: 15s
      timeout: 15s
      start_period: 5s
      retries: 3

    deploy:
      replicas: 2

      update_config: &update_config
        parallelism: 2
        delay: 10s
        monitor: 60s
        failure_action: rollback
        order: start-first
        max_failure_ratio: 0

      resources: &resources_low
        reservations:
          cpus: '0.1'
          memory: 128M
        limits:
          cpus: '0.25'
          memory: 256M

      placement: &placement_worker
        constraints:
          - node.role == worker

run-command.sh

#!/bin/bash
#
# Helps to run commands from CI piplene jobs.
#
# By: Alexey Chudin <kazqvaizer@gmail.com>
# License: MIT
#
# Example:
# 
# ssh SERVER "/srv/run-command.sh STACK_NAME DOCKER_IMAGE:${CI_SHA1} './manage.py migrate --noinput'"
#

STACK_NAME=$1

if [ "$STACK_NAME" == "" ]; then
    echo "Please, specify first argument as your stack directory name."
    exit
fi

DOCKER_IMAGE=$2

if [ "$DOCKER_IMAGE" == "" ]; then
    echo "Please, specify second argument as docker image with tag."
    exit
fi

COMMAND=$3

if [ "$COMMAND" == "" ]; then
    echo "Please, specify third argument as command to run inside docker image for stack env file."
    exit
fi

NETWORK=${STACK_NAME}_stacknet

cd /srv/$STACK_NAME

docker run --rm -t --network=$NETWORK --env-file env $DOCKER_IMAGE $COMMAND