Init `compose.yaml` to configure and start a local GitLab runner

services:

  runner:

    build:

      dockerfile_inline: |

        FROM golang:1.24-alpine AS builder

        WORKDIR /build

        COPY go.mod go.sum .

        RUN go mod download

        COPY . .

        RUN go build -o fleeting-plugin-cloudscale main.go

        FROM gitlab/gitlab-runner:latest

        COPY --from=builder /build/fleeting-plugin-cloudscale /bin/fleeting-plugin-cloudscale

    configs:

      - source: runner_config

        target: /etc/gitlab-runner/config.toml

    develop:

      watch:

        - action: rebuild

          path: .

configs:

  runner_config:

    name: "config.toml"

    content: |

      log_level = "debug"

      [[runners]]

        # Set as environment variable or replace this with your GitLab instance URL if needed.

        url = "$GITLAB_URL"

        # Set as environment variable or replace with token from new (project) runner registration.

        token = "$RUNNER_TOKEN"

        # For this example we will use instance runners.

        executor = "instance"

      [runners.autoscaler]

        plugin = "fleeting-plugin-cloudscale" # Same name as the built binary.

      [[runners.autoscaler.policy]]

        idle_count = 0 # We only want to create instances when needed.