Hi.
I just built an OpenWrt image with cgroups, veth, etc. and installed docker for the first time.
Containerd starts fine, dockerd starts fine, image download works, but I can’t start any containers, not even very basic ones like hello-world.
# docker run -i hello-world
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: can't get final child's PID from pipe: EOF: unknown.
I tried to start containerd and dockerd manually with debug enabled. Here are the logs created when the above command executes:
dockerd log:
time="2026-01-05T18:40:25.448047774+02:00" level=debug msg="Calling HEAD /_ping" spanID=521ddf8c8b3d1385 traceID=6245791da82c8daac57ee739238dc4e9
time="2026-01-05T18:40:25.452194584+02:00" level=debug msg="Calling POST /v1.47/containers/create" spanID=203a210d6803cec8 traceID=2dacae4ca3bbda3a17e693d46e128615
time="2026-01-05T18:40:25.453155455+02:00" level=debug msg="form data: {\"AttachStderr\":true,\"AttachStdin\":true,\"AttachStdout\":true,\"Cmd\":null,\"Domainname\":\"\",\"Entrypoint\":null,\"Env\":null,\"HostConfig\":{\"AutoRemove\":false,\"Binds\":null,\"BlkioDeviceReadBps\":[],\"BlkioDeviceReadIOps\":[],\"BlkioDeviceWriteBps\":[],\"BlkioDeviceWriteIOps\":[],\"BlkioWeight\":0,\"BlkioWeightDevice\":[],\"CapAdd\":null,\"CapDrop\":null,\"Cgroup\":\"\",\"CgroupParent\":\"\",\"CgroupnsMode\":\"\",\"ConsoleSize\":[65,175],\"ContainerIDFile\":\"\",\"CpuCount\":0,\"CpuPercent\":0,\"CpuPeriod\":0,\"CpuQuota\":0,\"CpuRealtimePeriod\":0,\"CpuRealtimeRuntime\":0,\"CpuShares\":0,\"CpusetCpus\":\"\",\"CpusetMems\":\"\",\"DeviceCgroupRules\":null,\"DeviceRequests\":null,\"Devices\":[],\"Dns\":[],\"DnsOptions\":[],\"DnsSearch\":[],\"ExtraHosts\":null,\"GroupAdd\":null,\"IOMaximumBandwidth\":0,\"IOMaximumIOps\":0,\"IpcMode\":\"\",\"Isolation\":\"\",\"Links\":null,\"LogConfig\":{\"Config\":{},\"Type\":\"\"},\"MaskedPaths\":null,\"Memory\":0,\"MemoryReservation\":0,\"MemorySwap\":0,\"MemorySwappiness\":-1,\"NanoCpus\":0,\"NetworkMode\":\"default\",\"OomKillDisable\":false,\"OomScoreAdj\":0,\"PidMode\":\"\",\"PidsLimit\":0,\"PortBindings\":{},\"Privileged\":false,\"PublishAllPorts\":false,\"ReadonlyPaths\":null,\"ReadonlyRootfs\":false,\"RestartPolicy\":{\"MaximumRetryCount\":0,\"Name\":\"no\"},\"SecurityOpt\":null,\"ShmSize\":0,\"UTSMode\":\"\",\"Ulimits\":[],\"UsernsMode\":\"\",\"VolumeDriver\":\"\",\"VolumesFrom\":null},\"Hostname\":\"\",\"Image\":\"hello-world\",\"Labels\":{},\"NetworkingConfig\":{\"EndpointsConfig\":{\"default\":{\"Aliases\":null,\"DNSNames\":null,\"DriverOpts\":null,\"EndpointID\":\"\",\"Gateway\":\"\",\"GlobalIPv6Address\":\"\",\"GlobalIPv6PrefixLen\":0,\"IPAMConfig\":null,\"IPAddress\":\"\",\"IPPrefixLen\":0,\"IPv6Gateway\":\"\",\"Links\":null,\"MacAddress\":\"\",\"NetworkID\":\"\"}}},\"OnBuild\":null,\"OpenStdin\":true,\"StdinOnce\":true,\"Tty\":false,\"User\":\"\",\"Volumes\":{},\"WorkingDir\":\"\"}" spanID=203a210d6803cec8 traceID=2dacae4ca3bbda3a17e693d46e128615
time="2026-01-05T18:40:25.464520019+02:00" level=debug msg="container mounted via layerStore: /var/docker/vfs/dir/a6963ba3c534ea13ac35d4d52c3ac5d3b9fac731e647335db7d42da9487edf52" container=0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1
time="2026-01-05T18:40:25.616320883+02:00" level=debug msg="Calling POST /v1.47/containers/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1/attach?stderr=1&stdin=1&stdout=1&stream=1" spanID=55ded01ac198af23 traceID=7eff8be81c963a59669dd4fc5e39b1eb
time="2026-01-05T18:40:25.617044664+02:00" level=debug msg="attach: stdin: begin"
time="2026-01-05T18:40:25.617368510+02:00" level=debug msg="attach: stdout: begin"
time="2026-01-05T18:40:25.617633737+02:00" level=debug msg="attach: stderr: begin"
time="2026-01-05T18:40:25.618061734+02:00" level=debug msg="Calling POST /v1.47/containers/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1/wait?condition=next-exit" spanID=feaacbedaf3dad7b traceID=fe7f67e3ea54f02bcae23086be5b5e1d
time="2026-01-05T18:40:25.620287195+02:00" level=debug msg="Calling POST /v1.47/containers/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1/start" spanID=562fbac465afea3d traceID=e916061151ff015945312fe43a3341e0
time="2026-01-05T18:40:25.620651987+02:00" level=debug msg="container mounted via layerStore: /var/docker/vfs/dir/a6963ba3c534ea13ac35d4d52c3ac5d3b9fac731e647335db7d42da9487edf52" container=0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1
time="2026-01-05T18:40:25.620926768+02:00" level=debug msg="Assigning addresses for endpoint dreamy_goldberg's interface on network bridge"
time="2026-01-05T18:40:25.621005983+02:00" level=debug msg="RequestAddress(LocalDefault/172.17.0.0/16, <nil>, map[])"
time="2026-01-05T18:40:25.621115553+02:00" level=debug msg="Request address PoolID:172.17.0.0/16 Bits: 65536, Unselected: 65533, Sequence: (0xc0000000, 1)->(0x0, 2046)->(0x1, 1)->end Curr:0 Serial:false PrefAddress:invalid IP "
time="2026-01-05T18:40:25.930877888+02:00" level=debug msg="Assigning addresses for endpoint dreamy_goldberg's interface on network bridge"
time="2026-01-05T18:40:26.262645169+02:00" level=info msg="No non-localhost DNS nameservers are left in resolv.conf. Using default external servers"
time="2026-01-05T18:40:26.450688112+02:00" level=debug msg="Programming external connectivity on endpoint dreamy_goldberg (55b0aa99c9872a167168668081c2dfd7ea4a31430034482cc9eddb48e9cd735f)" spanID=16d2dafc21c75a25 traceID=e916061151ff015945312fe43a3341e0
time="2026-01-05T18:40:26.613218285+02:00" level=debug msg="EnableService 0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 START"
time="2026-01-05T18:40:26.613327998+02:00" level=debug msg="EnableService 0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 DONE"
time="2026-01-05T18:40:26.663872235+02:00" level=debug msg="bundle dir created" bundle=/var/run/docker/containerd/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 module=libcontainerd namespace=moby root=/var/docker/vfs/dir/a6963ba3c534ea13ac35d4d52c3ac5d3b9fac731e647335db7d42da9487edf52
time="2026-01-05T18:40:27.299729344+02:00" level=error msg="stream copy error: reading from a closed fifo"
time="2026-01-05T18:40:27.314668684+02:00" level=error msg="stream copy error: reading from a closed fifo"
time="2026-01-05T18:40:27.314938682+02:00" level=debug msg="attach: stdout: end"
time="2026-01-05T18:40:27.315043570+02:00" level=debug msg="attach: stderr: end"
time="2026-01-05T18:40:27.315080748+02:00" level=debug msg="attach: stdin: end"
time="2026-01-05T18:40:27.315326895+02:00" level=debug msg="attach done"
time="2026-01-05T18:40:27.571515803+02:00" level=debug msg="Revoking external connectivity on endpoint dreamy_goldberg (55b0aa99c9872a167168668081c2dfd7ea4a31430034482cc9eddb48e9cd735f)" spanID=a16a436f51ffabb6 traceID=e916061151ff015945312fe43a3341e0
time="2026-01-05T18:40:28.219835103+02:00" level=debug msg="Releasing addresses for endpoint dreamy_goldberg's interface on network bridge"
time="2026-01-05T18:40:28.219969805+02:00" level=debug msg="ReleaseAddress(LocalDefault/172.17.0.0/16, 172.17.0.2)"
time="2026-01-05T18:40:28.220088172+02:00" level=debug msg="Released address Address:172.17.0.2 Sequence:Bits: 65536, Unselected: 65533, Sequence: (0xc0000000, 1)->(0x0, 2046)->(0x1, 1)->end Curr:3"
time="2026-01-05T18:40:28.473884399+02:00" level=error msg="Handler for POST /v1.47/containers/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1/start returned error: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: can't get final child's PID from pipe: EOF: unknown" spanID=562fbac465afea3d traceID=e916061151ff015945312fe43a3341e0
time="2026-01-05T18:40:28.475275289+02:00" level=debug msg="Closing buffered stdin pipe"
containerd log:
time="2026-01-05T18:40:27.164623845+02:00" level=debug msg="shim bootstrap parameters" address="unix:///run/containerd/s/81e3a1cc8a060c5cacd6cd2f5c8c0735a14cf2a8a598abdd54331f1d6c3a399b" namespace=moby protocol=ttrpc
time="2026-01-05T18:40:27.179256154+02:00" level=info msg="loading plugin \"io.containerd.event.v1.publisher\"..." runtime=io.containerd.runc.v2 type=io.containerd.event.v1
time="2026-01-05T18:40:27.181830865+02:00" level=info msg="loading plugin \"io.containerd.internal.v1.shutdown\"..." runtime=io.containerd.runc.v2 type=io.containerd.internal.v1
time="2026-01-05T18:40:27.181968363+02:00" level=info msg="loading plugin \"io.containerd.ttrpc.v1.task\"..." runtime=io.containerd.runc.v2 type=io.containerd.ttrpc.v1
time="2026-01-05T18:40:27.183858906+02:00" level=debug msg="registering ttrpc service" id=io.containerd.ttrpc.v1.task
time="2026-01-05T18:40:27.183977367+02:00" level=info msg="loading plugin \"io.containerd.ttrpc.v1.pause\"..." runtime=io.containerd.runc.v2 type=io.containerd.ttrpc.v1
time="2026-01-05T18:40:27.184054789+02:00" level=debug msg="registering ttrpc service" id=io.containerd.ttrpc.v1.pause
time="2026-01-05T18:40:27.184465457+02:00" level=debug msg="serving api on socket" socket="[inherited from parent]"
time="2026-01-05T18:40:27.184646006+02:00" level=debug msg="starting signal loop" namespace=moby path=/tmp/run/containerd/io.containerd.runtime.v2.task/moby/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 pid=30864 runtime=io.containerd.runc.v2
time="2026-01-05T18:40:27.253107104+02:00" level=debug msg="failed to delete task" error="rpc error: code = NotFound desc = container not created: not found" id=0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1
time="2026-01-05T18:40:27.254079756+02:00" level=info msg="shim disconnected" id=0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 namespace=moby
time="2026-01-05T18:40:27.254202017+02:00" level=warning msg="cleaning up after shim disconnected" id=0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1 namespace=moby
time="2026-01-05T18:40:27.254299748+02:00" level=info msg="cleaning up dead shim" namespace=moby
time="2026-01-05T18:40:27.295860426+02:00" level=warning msg="cleanup warnings time=\"2026-01-05T18:40:27+02:00\" level=debug msg=\"starting signal loop\" namespace=moby pid=30887 runtime=io.containerd.runc.v2\ntime=\"2026-01-05T18:40:27+02:00\" level=warning msg=\"failed to read init pid file\" error=\"open /tmp/run/containerd/io.containerd.runtime.v2.task/moby/0cac68dc70e1c3b7a08c4bcee42b447ca50bfc9b1492ccd87497457f5ea1eae1/init.pid: no such file or directory\" runtime=io.containerd.runc.v2\n" namespace=moby
time="2026-01-05T18:40:27.297663732+02:00" level=error msg="copy shim log" error="read /proc/self/fd/12: file already closed" namespace=moby
Any ideeas?
Thanks.