fix: make container.sweep opt-in (#1389)

Sweeping removed every container a job started through its Docker proxy, which silently tore down services that jobs deploy to the runner's own Docker daemon. Deploying from a runner on the target host is common, so `container.sweep` now defaults to `false` and CI-only runners can opt in with `container.sweep: true`.

Fixes https://gitea.com/gitea/runner/issues/1385

Reviewed-on: https://gitea.com/gitea/runner/pulls/1389
Reviewed-by: bircni <[email protected]>
Co-authored-by: silverwind <[email protected]>

README.md

@@ -243,7 +243,7 @@ volumes:
   - ${GITEA_DOCKER_WORKSPACE:-.}/data:/app/data
 ```
 
-In most Linux container jobs, the containers, networks and volumes a job creates are removed when it ends, `docker compose` services included. Set `container.sweep: false` if jobs deploy services to the runner's Docker daemon.
+Set `container.sweep: true` to remove the containers, networks and volumes most Linux container jobs create when they end, `docker compose` services included. Leave it off if jobs deploy services to the runner's Docker daemon.
 
 ### Built-in actions (`uses: builtin:<name>`)
 

act/runner/docker_proxy_integration_test.go

@@ -49,6 +49,7 @@ func TestDockerProxyMountedJob(t *testing.T) {
 		ContainerNamePrefix:   resourceName,
 		ContainerDaemonSocket: dockerClient.DaemonHost(),
 		ContainerMaxLifetime:  2 * time.Minute,
+		Sweep:                 true,
 		ContainerOptions:      "-v /usr/local/bin/docker:/usr/local/bin/docker:ro -v /usr/local/libexec/docker/cli-plugins:/usr/local/libexec/docker/cli-plugins:ro",
 		ValidVolumes:          []string{"/usr/local/bin/docker", "/usr/local/libexec/docker/cli-plugins"},
 		Env:                   map[string]string{"PROXY_TEST_RESOURCE": resourceName, "PROXY_TEST_MODE": mode, "PROXY_TEST_IMAGE": baseImage, "COMPOSE_PROJECT_NAME": resourceName},

act/runner/run_context.go

@@ -810,7 +810,7 @@ func (rc *RunContext) cleanupJobResources(networkName string, createAndDeleteNet
 		errs = append(errs, runAll(ctx, containers))
 		ctx, cancel := context.WithTimeout(context.WithoutCancel(ctx), jobCleanupTimeout)
 		defer cancel()
-		if !common.Dryrun(ctx) && !rc.Config.NoSweep && (preclean || rc.hadDockerProxy) {
+		if !common.Dryrun(ctx) && rc.Config.Sweep && (preclean || rc.hadDockerProxy) {
 			errs = append(errs, container.RemoveDockerJobResources(ctx, rc.jobContainerName())) // after the containers, whose endpoints would block removing the job networks
 		}
 		var rest []common.Executor

act/runner/run_context_test.go

@@ -725,7 +725,7 @@ func TestCleanupJobResources(t *testing.T) {
 			service.On("Remove").Return(removeAlongside(serviceRemoving, jobRemoving, removeError)).Once()
 			service.On("Close").Return(func(context.Context) error { return closeError }).Once()
 			rc := &RunContext{
-				Config:            &Config{CacheContainer: "cache-container", NoSweep: name == "kept proxy"},
+				Config:            &Config{CacheContainer: "cache-container", Sweep: name != "kept proxy"},
 				Run:               &model.Run{Workflow: &model.Workflow{Name: "wf"}, JobID: "job"},
 				JobContainer:      job,
 				serviceContainers: []*serviceContainer{{name: "svc", container: service}},

act/runner/runner.go

@@ -91,7 +91,7 @@ type Config struct {
 	MaxParallel                       int            // max parallel jobs to run across all workflows (0 = no limit, uses CPU count)
 	AllocatePTY                       bool           // allocate a pseudo-TTY for each step's process
 	ServiceReadyTimeout               time.Duration  // how long a job waits for its service containers to report healthy (0 uses the default)
-	NoSweep                           bool           // keep the containers, networks and volumes a job creates through its docker proxy
+	Sweep                             bool           // remove the containers, networks and volumes a job creates through its docker proxy
 	RunnerName                        string         // name this runner registered with, reported as `runner.name`, defaults to the hostname
 	JobStartedHook                    string         // script run inside the job environment before the job's first step; ACTIONS_RUNNER_HOOK_JOB_STARTED is read from Env when empty
 	JobCompletedHook                  string         // script run inside the job environment after the job's last step; ACTIONS_RUNNER_HOOK_JOB_COMPLETED is read from Env when empty

internal/app/run/runner.go

@@ -612,7 +612,7 @@ func (r *Runner) run(ctx context.Context, task *runnerv1.Task, reporter *report.
 		},
 		ContainerOptions:                  r.cfg.Container.Options,
 		ServiceReadyTimeout:               r.cfg.Container.ServiceReadyTimeout,
-		NoSweep:                           r.cfg.Container.Sweep != nil && !*r.cfg.Container.Sweep,
+		Sweep:                             r.cfg.Container.Sweep,
 		ContainerDaemonSocket:             r.cfg.Container.DockerHost,
 		Privileged:                        r.cfg.Container.Privileged,
 		DefaultActionInstance:             r.getDefaultActionsURL(task),

internal/pkg/config/config.example.yaml

@@ -306,8 +306,8 @@ container:
   # healthy. A negative value (e.g. -1s) starts the steps without waiting.
   #service_ready_timeout: 5m
   # Remove the containers, networks and volumes a job creates through its Docker proxy when
-  # the job ends. Set to false when jobs deploy services to the runner's Docker daemon.
+  # the job ends. Leave off when jobs deploy services to the runner's Docker daemon.
-  #sweep: true
+  #sweep: false
 
 host:
   # The parent directory of a job's working directory.

internal/pkg/config/config.go

@@ -190,7 +190,7 @@ type Container struct {
 	DockerTimeout        time.Duration                 `yaml:"docker_timeout"`         // Timeout to wait for the docker daemon to be reachable, if docker is required by require_docker or runner
 	BindWorkdir          bool                          `yaml:"bind_workdir"`           // BindWorkdir mounts the workspace from a host directory instead of a Docker volume.
 	ServiceReadyTimeout  time.Duration                 `yaml:"service_ready_timeout"`  // ServiceReadyTimeout bounds how long a job waits for a service container that declares a healthcheck to report healthy. Negative disables waiting.
-	Sweep                *bool                         `yaml:"sweep"`                  // Sweep removes the containers, networks and volumes a job creates through its Docker proxy when the job ends. Unset means enabled.
+	Sweep                bool                          `yaml:"sweep"`                  // Sweep removes the containers, networks and volumes a job creates through its Docker proxy when the job ends.
 }
 
 // Values of Runner.ToolCacheMode: the runner mounts no tool cache, or one that every job reuses.