Links ignore other running services when restarting a single service

[Chostakovitch]

ISSUE TYPE

• Bug Report

container.yml

version: "2"
settings:
  conductor:
    base: alpine:3.5
  project_name: link_alias

services:
  dest_link:
    from: alpine:3.5
    command: [ 'sleep', '1000' ]

  source_link:
    from: alpine:3.5
    command: [ 'sleep', '1000' ]
    links:
      - dest_link

OS / ENVIRONMENT

Ansible Container, version 0.9.3rc0
Linux, chosto-XPS-15-9560, 4.13.0-39-generic, #44-Ubuntu SMP Thu Apr 5 14:25:01 UTC 2018, x86_64
2.7.14 (default, Sep 23 2017, 22:06:14) 
[GCC 7.2.0] /usr/bin/python
{
  "ContainersPaused": 0, 
  "Labels": [], 
  "CgroupDriver": "cgroupfs", 
  "ContainersRunning": 13, 
  "ContainerdCommit": {
    "Expected": "773c489c9c1b21a6d78b5c538cd395416ec50f88", 
    "ID": "773c489c9c1b21a6d78b5c538cd395416ec50f88"
  }, 
  "InitBinary": "docker-init", 
  "NGoroutines": 112, 
  "Swarm": {
    "ControlAvailable": false, 
    "NodeID": "", 
    "Error": "", 
    "RemoteManagers": null, 
    "LocalNodeState": "inactive", 
    "NodeAddr": ""
  }, 
  "LoggingDriver": "json-file", 
  "OSType": "linux", 
  "HttpProxy": "", 
  "Runtimes": {
    "runc": {
      "path": "docker-runc"
    }
  }, 
  "DriverStatus": [
    [
      "Backing Filesystem", 
      "extfs"
    ], 
    [
      "Supports d_type", 
      "true"
    ], 
    [
      "Native Overlay Diff", 
      "true"
    ]
  ], 
  "OperatingSystem": "Ubuntu 17.10", 
  "Containers": 56, 
  "HttpsProxy": "", 
  "BridgeNfIp6tables": true, 
  "MemTotal": 16662814720, 
  "SecurityOptions": [
    "name=apparmor", 
    "name=seccomp,profile=default"
  ], 
  "Driver": "overlay2", 
  "IndexServerAddress": "https://index.docker.io/v1/", 
  "ClusterStore": "", 
  "InitCommit": {
    "Expected": "949e6fa", 
    "ID": "949e6fa"
  }, 
  "GenericResources": null, 
  "Isolation": "", 
  "SystemStatus": null, 
  "OomKillDisable": true, 
  "ClusterAdvertise": "", 
  "SystemTime": "2018-05-16T17:14:25.682903347+02:00", 
  "Name": "chosto-XPS-15-9560", 
  "CPUSet": true, 
  "RegistryConfig": {
    "AllowNondistributableArtifactsCIDRs": [], 
    "Mirrors": [], 
    "IndexConfigs": {
      "docker.io": {
        "Official": true, 
        "Name": "docker.io", 
        "Secure": true, 
        "Mirrors": []
      }
    }, 
    "AllowNondistributableArtifactsHostnames": [], 
    "InsecureRegistryCIDRs": [
      "127.0.0.0/8"
    ]
  }, 
  "DefaultRuntime": "runc", 
  "ContainersStopped": 43, 
  "NCPU": 8, 
  "NFd": 124, 
  "Architecture": "x86_64", 
  "KernelMemory": true, 
  "CpuCfsQuota": true, 
  "Debug": false, 
  "ID": "QKCR:7XJZ:3377:X2MH:6HP2:4DHH:MHE3:54OJ:5YFO:4Q4I:PJYL:C6FV", 
  "IPv4Forwarding": true, 
  "KernelVersion": "4.13.0-39-generic", 
  "BridgeNfIptables": true, 
  "NoProxy": "", 
  "LiveRestoreEnabled": false, 
  "ServerVersion": "18.03.1-ce", 
  "CpuCfsPeriod": true, 
  "ExperimentalBuild": false, 
  "MemoryLimit": true, 
  "SwapLimit": false, 
  "Plugins": {
    "Volume": [
      "local"
    ], 
    "Network": [
      "bridge", 
      "host", 
      "macvlan", 
      "null", 
      "overlay"
    ], 
    "Authorization": null, 
    "Log": [
      "awslogs", 
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      "syslog"
    ]
  }, 
  "Images": 82, 
  "DockerRootDir": "/var/lib/docker", 
  "NEventsListener": 0, 
  "CPUShares": true, 
  "RuncCommit": {
    "Expected": "4fc53a81fb7c994640722ac585fa9ca548971871", 
    "ID": "4fc53a81fb7c994640722ac585fa9ca548971871"
  }
}
{
  "KernelVersion": "4.13.0-39-generic", 
  "Components": [
    {
      "Version": "18.03.1-ce", 
      "Name": "Engine", 
      "Details": {
        "KernelVersion": "4.13.0-39-generic", 
        "Os": "linux", 
        "BuildTime": "2018-04-26T07:15:45.000000000+00:00", 
        "ApiVersion": "1.37", 
        "MinAPIVersion": "1.12", 
        "GitCommit": "9ee9f40", 
        "Arch": "amd64", 
        "Experimental": "false", 
        "GoVersion": "go1.9.5"
      }
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  ], 
  "Arch": "amd64", 
  "BuildTime": "2018-04-26T07:15:45.000000000+00:00", 
  "ApiVersion": "1.37", 
  "Platform": {
    "Name": ""
  }, 
  "Version": "18.03.1-ce", 
  "MinAPIVersion": "1.12", 
  "GitCommit": "9ee9f40", 
  "Os": "linux", 
  "GoVersion": "go1.9.5"
}

SUMMARY

When linking services together, I am not able to specifically start a single service which is linked to another service because the other service is reported as undefined.

With an analog docker-compose, I don't experiment this behavior, see last section.

STEPS TO REPRODUCE

ansible-container init
# fill-up container.yml with file above
ansible-container build
ansible-container run # works fine
ansible-container restart source_link dest_link # also works fine
ansible-container restart source_link # fails

EXPECTED RESULTS

I expect the service to be restarted and either linked to the already running container, either to a new container.

ACTUAL RESULTS

The target service is reported as undefined.

# output truncated
The full traceback is:
  File "/tmp/ansible_IXOxuw/ansible_module_docker_service.py", line 648, in __init__
    self.project = project_from_options(self.project_src, self.options)
  File "/usr/lib/python2.7/site-packages/compose/cli/command.py", line 41, in project_from_options
    compatibility=options.get('--compatibility'),
  File "/usr/lib/python2.7/site-packages/compose/cli/command.py", line 113, in get_project
    config_data = config.load(config_details, compatibility)
  File "/usr/lib/python2.7/site-packages/compose/config/config.py", line 402, in load
    service_dicts = load_services(config_details, main_file, compatibility)
  File "/usr/lib/python2.7/site-packages/compose/config/config.py", line 502, in load_services
    return build_services(service_config)
  File "/usr/lib/python2.7/site-packages/compose/config/config.py", line 481, in build_services
    for name, service_dict in service_config.items()
  File "/usr/lib/python2.7/site-packages/compose/config/config.py", line 467, in build_service
    validate_service(service_config, service_names, config_file)
  File "/usr/lib/python2.7/site-packages/compose/config/config.py", line 705, in validate_service
    validate_links(service_config, service_names)
  File "/usr/lib/python2.7/site-packages/compose/config/validation.py", line 230, in validate_links
    "undefined.".format(s=service_config, link=link))
fatal: [localhost]: FAILED! => {
    "changed": false,
    "failed": true,
    "invocation": {
        "module_args": {
            "api_version": null,
            "build": false,
            "cacert_path": null,
            "cert_path": null,
            "debug": false,
            "definition": {
                "services": {
                    "source_link": {
                        "command": [
                            "sleep",
                            "1000"
                        ],
                        "image": "alpine:3.5",
                        "links": [
                            "dest_link"
                        ]
                    }
                },
                "version": "2"
            },
            "dependencies": true,
            "docker_host": null,
            "files": null,
            "filter_logger": false,
            "hostname_check": false,
            "key_path": null,
            "nocache": false,
            "project_name": "link_alias",
            "project_src": null,
            "pull": false,
            "recreate": "smart",
            "remove_images": null,
            "remove_orphans": false,
            "remove_volumes": false,
            "restarted": true,
            "scale": null,
            "services": null,
            "ssl_version": null,
            "state": "present",
            "stopped": false,
            "timeout": 10,
            "tls": null,
            "tls_hostname": null,
            "tls_verify": null
        }
    },
    "msg": "Configuration error - Service 'source_link' has a link to service 'dest_link' which is undefined."
}

WITH DOCKER-COMPOSE

I don't know if this is relevant, but check this analog docker-compose.yml :

version: '2'
services:
  dest_link:
    image: "alpine:3.5"
    command: [ "sleep", "1000" ]
  source_link:
    image: "alpine:3.5"
    command: [ "sleep", "1000" ]
    links:
      - dest_link

When running the following analog commands :

docker-compose up -d
docker-compose restart -t 1 source_link

All works fine.

Thank you for your time and please tell me if you need anything else.