{"task": {"agent_timeout": 3000, "task": "testgen__prometheus__prometheus-10311", "verifier_timeout": 3000, "instruction": "The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text.\n<issue>\n      **What did you do?**\nBased loosely on the [dockerswarm SD documentation](https://prometheus.io/docs/guides/dockerswarm/#monitoring-containers), I tried to set up service discovery with a small tweak: using _task labels_ rather than _service labels_.\n\nExample docker-stack.yml:\n```yaml\nversion: \"3.5\"\n\nservices:\n  example:\n    image: example\n    labels:\n      prometheus-job: containerlabel\n    deploy:\n      replicas: 2\n```\n\nAnd the associated `prometheus.yml` -- this is directly copied from [Prometheus documentation](https://prometheus.io/docs/guides/dockerswarm/#monitoring-containers) but uses \"\\_\\_meta\\_dockerswarm\\_**task**\\_label\\_\" rather than \"\\_\\_meta\\_dockerswarm\\_**service**\\_label\\_\"\n```yaml\nscrape_configs:\n  - job_name: 'dockerswarm'\n    dockerswarm_sd_configs:\n      - host: unix:///var/run/docker.sock\n        role: tasks\n    relabel_configs:\n      # Only keep containers that should be running.\n      - source_labels: [__meta_dockerswarm_task_desired_state]\n        regex: running\n        action: keep\n      # Only keep containers that have a `prometheus-job` label.\n      - source_labels: [__meta_dockerswarm_task_label_prometheus_job]\n        regex: .+\n        action: keep\n      # Use the prometheus-job Swarm label as Prometheus job label.\n      - source_labels: [__meta_dockerswarm_task_label_prometheus_job]\n        target_label: job\n```\n\n**What did you expect to see?**\nI expected Prometheus to identify each task instance as a target through dockerswarm service discovery, but the `__meta_dockerswarm_task_label_*` meta-labels don't seem to be populated:\n![image](https://user-images.githubusercontent.com/10787950/128954515-619e163c-fed6-446d-9155-86c415418770.png)\n\nThe labels _do_ seem to be set correctly -- running `docker service inspect example` gives something like:\n```\n// ID, Version, etc...\n\"Spec\": {\n    \"Name\": \"example_example\",\n    \"Labels\": {\n        \"com.docker.stack.image\": \"example\",\n        \"com.docker.stack.namespace\": \"example\",\n    },\n    \"TaskTemplate\": {\n        \"ContainerSpec\": {\n            \"Image\": \"example:latest\",\n            \"Labels\": {\n                \"com.docker.stack.namespace\": \"localization\",\n                \"prometheus-job\": \"containerlabel\",       // <---- label is correctly set!\n            },\n// blah blah...\n}\n```\n\nPoking around in the docker swarm SD source shows we're populating task labels by querying the docker client API for a TaskList:\n\nhttps://github.com/prometheus/prometheus/blob/39d79c3cfb86c47d6bc06a9e9317af582f1833bb/discovery/moby/tasks.go#L46\n\nthen, for each task in the returned values, adding `task.Labels`:\n\nhttps://github.com/prometheus/prometheus/blob/39d79c3cfb86c47d6bc06a9e9317af582f1833bb/discovery/moby/tasks.go#L78-L81\n\nHowever, as far as I can tell, the container labels are not set on `task.Labels` but instead on `task.Spec.ContainerSpec.Labels`: a cheeky little test with the docker client seems to support this.\n\n<details>\n  <summary>Example go source -- click to expand</summary>\n\n```go\npackage main\n\nimport (\n    \"context\"\n    \"fmt\"\n\n    \"github.com/docker/docker/api/types\"\n    \"github.com/docker/docker/client\"\n)\n\nfunc main() {\n    opts := []client.Opt{\n        client.WithHost(\"unix:///var/run/docker.sock\"),\n        client.WithAPIVersionNegotiation(),\n    }\n\n    c, err := client.NewClientWithOpts(opts...)\n\n    if err != nil {\n        fmt.Errorf(\"Failed to create client, %w\", err)\n    }\n\n    ctx := context.TODO()\n    tasks, err := c.TaskList(ctx, types.TaskListOptions{})\n\n    if err != nil {\n        fmt.Errorf(\"Failed to query task list, %w\", err)\n    }\n\n    for _, t := range tasks {\n        fmt.Printf(\"task.Labels is empty: %s\\n\", t.Labels)\n        fmt.Printf(\"but task.Spec.ContainerSpec.Labels is not: %s\\n\", t.Spec.ContainerSpec.Labels)\n    }\n}\n```\n</details>\n\ngives me:\n\n```\ntask.Labels is empty: map[]\nbut task.Spec.ContainerSpec.Labels is not: map[com.docker.stack.namespace:example, prometheus-job:containerlabel]\n```\n\nThis was somewhat touched on in the discussion for https://github.com/prometheus/prometheus/issues/8272#issuecomment-857699769 but I'm still unclear on how to work with \"task labels\".\n\nAre task labels == container labels? If not, how can we set task labels in docker swarm that would be picked up by Prometheus's service discovery? Otherwise, should https://github.com/prometheus/prometheus/blob/39d79c3cfb86c47d6bc06a9e9317af582f1833bb/discovery/moby/tasks.go#L78 use `s.Spec.ContainerSpec.Labels` rather than `s.Labels`?\n\n</issue>\nPlease generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets).\nYou may apply changes to several files.\nApply as much reasoning as you please and see necessary.\nMake sure to implement only test cases and don't try to fix the issue itself.\nYou are not allowed to read git history.\n", "memory": "8192m", "runnable": false, "difficulty": "hard", "language": "", "cpus": "", "instruction_truncated": false, "category": "test-generation", "compose": false, "has_solution": true, "oracle": null, "docker_image": "", "taskset": "devopsgym", "tags": ["test-generation", "devops-bench"]}, "runs": []}