local gitea runner service can not find gitea server

Question

when i run the command actions/checkout@v4 i get an error

I a gitea docker container running on ubuntu.

this is the docker compose file:

services:
  gitea:
    image: gitea/gitea:latest
    container_name: gitea
    environment:
      - USER_UID=1000
      - USER_GID=1000
    restart: always
    volumes:
      - gitea-data:/data
    ports:
      - "3000:3000"   # Gitea web interface
      - "222:22"       # SSH for Git access
    networks:
      - gitea_network

volumes:
  gitea-data:
    external: true

networks:
  gitea_network:
    driver: bridge
    external: true

And a gitea action runner on a different docker (on the same server).

This is the runner docker compose:

services:
  runner:
    image: gitea/act_runner
    environment:
      GITEA_INSTANCE_URL: "http://gitea:3000"
      GITEA_RUNNER_REGISTRATION_TOKEN: "xxxxxxx"
      GITEA_RUNNER_NAME: "Gitea Runner"
    volumes:
      - ./gitea_runner:/data
      - /var/run/docker.sock:/var/run/docker.sock
    networks:
      - gitea_network

networks:
  gitea_network:
    driver: bridge
    external: true

Now, when i run the command: uses: actions/checkout@v4 under the file '.gitea/workflows/ci.yaml' in the repository.

i get the error :

fatal: unable to access 'http://gitea:3000/testuser/first_gitea_test/': Could not resolve host: gitea

What am i doing wrong? Why is the runner not recognizing Gitea? should it not have recognized it already? the runner already recognize the gitea server in the docker compose (otherwise the runner will not execute)

Answer 1

The runner needs to be configured to run workflows in the same Docker network as Gitea (container.network in act_runner's configuration)

To specify the config file in command line: ./act_runner --config config.yaml

When running runner from docker compose, it accepts a CONFIG_FILE environment variable (see below for my docker compose) The compose file needs to be used with

docker compose -p gitea up -d

-p gitea is needed because docker adds the name of the project in the network name, which needs to be specified in the config.yaml file

networks:
  gitea-network:
    external: false
volumes:
  postgres:
    driver: local
  gitea:
    driver: local
  runner:
    driver: local
services:
  runner:
    image: gitea/act_runner
    restart: unless-stopped
    depends_on:
      - server
    networks:
      - gitea-network
    volumes:
      - 'runner:/data'
      - './config:/var/gitea-config'
      - '/var/run/docker.sock:/var/run/docker.sock'
    environment:
      - 'CONFIG_FILE=/var/gitea-config/config.yaml'
      - 'GITEA_INSTANCE_URL=http://giteaserver:3000'
      - 'GITEA_RUNNER_REGISTRATION_TOKEN=<registration_token>'
  server:
    image: 'docker.io/gitea/gitea:latest'
    container_name: gitea
    hostname: giteaserver
    environment:
      - 'GITEA_RUNNER_REGISTRATION_TOKEN=<registration_token>'
      - 'USER_UID=1000'
      - 'USER_GID=1000'
      - 'GITEA__database__DB_TYPE=postgres'
      - 'GITEA__database__HOST=db:5432'
      - 'GITEA__database__NAME=gitea'
      - 'GITEA__database__USER=gitea'
      - 'GITEA__database__PASSWD=<database_password>'
    restart: unless-stopped
    networks:
      - gitea-network
    volumes:
      - 'gitea:/data'
      - '/etc/timezone:/etc/timezone:ro'
      - '/etc/localtime:/etc/localtime:ro'
    ports:
      - '3000:3000'
      - '2222:22'
    depends_on:
      - db
  db:
    image: 'docker.io/library/postgres:14'
    restart: unless-stopped
    networks:
      - gitea-network
    environment:
      - POSTGRES_USER=gitea
      - POSTGRES_PASSWORD=<database_password>
      - POSTGRES_DB=gitea
    volumes:
      - 'postgres:/var/lib/postgresql/data'

Here is my config.yaml file that needs to be in ./config folder (to create a new config file with default values you can run ./act_runner generate-config > config.yaml)

runner:
  file: .runner
  capacity: 1
  timeout: 3h
  shutdown_timeout: 0s
  insecure: false
  fetch_timeout: 5s
  fetch_interval: 2s
  labels:
    - "ubuntu-latest:docker://gitea/runner-images:ubuntu-latest"
    - "ubuntu-22.04:docker://gitea/runner-images:ubuntu-22.04"
    - "ubuntu-20.04:docker://gitea/runner-images:ubuntu-20.04"
cache:
  enabled: true
  dir: ""
  host: ""
  external_server: ""

container:
  privileged: false
  network: "gitea_gitea-network"
  workdir_parent:
  valid_volumes: []
  docker_host: ""
  force_pull: true
  force_rebuild: false
host:
  workdir_parent: