What?

Deploy application stacks to docker swarm in a controlled manner.

Why?

• Updating swarm config's used to be a pain, but not anymore.
• docker-compose.yml wasn't designed for docker swarm, swarm-app.yml is.
• swarm-app.yml is very explicit, no more optionals, no more short syntax.
• Going from replicated to global mode is possible without manually removing services.

CLI improvements

• swarm-app validate will exit on basic configuration file mistakes.
• swarm-app diff gives a proper diff like overview of what you are about to deploy.
• swarm-app wait waits for deployment to reconcile, and outputs status.

Config file improvements

Extends from external sources.

services:
  mywebserver:
    extends: 
      - { file: https://swarm-app.firecow.dk/1.0.0/general.yml, service: nginx }

Inline swarm configs with envsubst

export NGINX_FOLDER=html

services:
  nginx:
    configs:
      /etc/nginx/conf.d/default.conf:
        content: |
          server {
            location / {
              root ${NGINX_FOLDER};
            }
          }