I fail to have django channels communication with redis running at docker container: I am running the channels tutorial and I get an error when just following the tutorial instructions.
I am quite new with Django (designed a simple site) and have no knowledge on redis nor docker I am trying to lean channels using the tutorial: https://channels.readthedocs.io/en/latest/tutorial/ It uses redis over docker At tutorial part 2 there is a test for “channel layer can communicate with Redis”. I fails this test. I was looking over the web for solving this communication problem with no luck. As I am not familiar with redis nor docker, I have hard time analyzing the reasons for the communication problems. I can see that redis is running inside a docker container. $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 2bdabc272ec3 redis "docker-entrypoint.s…" About an hour ago Up About an hour 0.0.0.0:6379->6379/tcp quizzical_panini $ docker inspect quizzical_panini > redisimage.log (YB: will paste the logfile at the end of this message) python manage.py shell import channels.layers channel_layer = channels.layers.get_channel_layer() from asgiref.sync import async_to_sync async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'}) Error begins with: In [4]: async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'}) --------------------------------------------------------------------------- ConnectionRefusedError Traceback (most recent call last) <ipython-input-4-80e65666e9e2> in <module> ----> 1 async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'}) A lot of other details. Ends up with: 504 # Jump to any except clause below. --> 505 raise OSError(err, f'Connect call failed {address}') 506 except (BlockingIOError, InterruptedError): 507 # socket is still registered, the callback will be retried later ConnectionRefusedError: [Errno 10061] Connect call failed ('127.0.0.1', 6379) Some version details: installing shell command: $ docker run redis --version Redis server v=5.0.3 sha=00000000:0 malloc=jemalloc-5.1.0 bits=64 build=9f27eb593282148b $ pip install channels_redis *A lot of details: ends up with:* > Successfully installed channels-redis-2.3.3 $ python --version Python 3.7.1 (note that it is a 32 bit python while docker requires 64 bits. I assumed it should not be the reason for the problems I do experience >>>>>>>> redisimage.log generated by docker inspect as shown above <<<<<< >>>>>>>> It is long. I can’t tell id/what is relevant [ { "Id": "2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479", "Created": "2019-01-15T14:02:36.679774957Z", "Path": "docker-entrypoint.sh", "Args": [ "redis-server" ], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 8731, "ExitCode": 0, "Error": "", "StartedAt": "2019-01-15T14:02:37.086931139Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:5d2989ac9711b6c7a96dfca3110041d6259294f5ccd343491ecfffe3d14757cc", "ResolvConfPath": "/mnt/sda1/var/lib/docker/containers/2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479/resolv.conf", "HostnamePath": "/mnt/sda1/var/lib/docker/containers/2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479/hostname", "HostsPath": "/mnt/sda1/var/lib/docker/containers/2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479/hosts", "LogPath": "/mnt/sda1/var/lib/docker/containers/2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479/2bdabc272ec364e6b34a40e253d089e48b73d55cddcade1d51b70c202aad6479-json.log", "Name": "/quizzical_panini", "RestartCount": 0, "Driver": "overlay2", "Platform": "linux", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "", "ExecIDs": null, "HostConfig": { "Binds": null, "ContainerIDFile": "", "LogConfig": { "Type": "json-file", "Config": {} }, "NetworkMode": "default", "PortBindings": { "6379/tcp": [ { "HostIp": "", "HostPort": "6379" } ] }, "RestartPolicy": { "Name": "no", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "Dns": [], "DnsOptions": [], "DnsSearch": [], "ExtraHosts": null, "GroupAdd": null, "IpcMode": "shareable", "Cgroup": "", "Links": null, "OomScoreAdj": 0, "PidMode": "", "Privileged": false, "PublishAllPorts": false, "ReadonlyRootfs": false, "SecurityOpt": null, "UTSMode": "", "UsernsMode": "", "ShmSize": 67108864, "Runtime": "runc", "ConsoleSize": [ 30, 129 ], "Isolation": "", "CpuShares": 0, "Memory": 0, "NanoCpus": 0, "CgroupParent": "", "BlkioWeight": 0, "BlkioWeightDevice": [], "BlkioDeviceReadBps": null, "BlkioDeviceWriteBps": null, "BlkioDeviceReadIOps": null, "BlkioDeviceWriteIOps": null, "CpuPeriod": 0, "CpuQuota": 0, "CpuRealtimePeriod": 0, "CpuRealtimeRuntime": 0, "CpusetCpus": "", "CpusetMems": "", "Devices": [], "DeviceCgroupRules": null, "DiskQuota": 0, "KernelMemory": 0, "MemoryReservation": 0, "MemorySwap": 0, "MemorySwappiness": null, "OomKillDisable": false, "PidsLimit": 0, "Ulimits": null, "CpuCount": 0, "CpuPercent": 0, "IOMaximumIOps": 0, "IOMaximumBandwidth": 0, "MaskedPaths": [ "/proc/asound", "/proc/acpi", "/proc/kcore", "/proc/keys", "/proc/latency_stats", "/proc/timer_list", "/proc/timer_stats", "/proc/sched_debug", "/proc/scsi", "/sys/firmware" ], "ReadonlyPaths": [ "/proc/bus", "/proc/fs", "/proc/irq", "/proc/sys", "/proc/sysrq-trigger" ] }, "GraphDriver": { "Data": { "LowerDir": "/mnt/sda1/var/lib/docker/overlay2/37ad581f24c8ec87f199192366c304f952ce27177477746a1d33875a1bd7d7c7-init/diff:/mnt/sda1/var/lib/docker/overlay2/c596b32c9a6bf4a75405f329338e49ff6167970587db8155633861147b0e6b8a/diff:/mnt/sda1/var/lib/docker/overlay2/6d489fac67dc1b566ea6afa79d458d979294142d7f35edd719081e5559d586c1/diff:/mnt/sda1/var/lib/docker/overlay2/5683f690ef322b4d9c02b1bec18880ddc76d48cfebb4a5454143c919dbd3cee8/diff:/mnt/sda1/var/lib/docker/overlay2/d8fd6e07474c264294c0064dda1af0f3c09d7ec35301b8eecacb4ee926a7215b/diff:/mnt/sda1/var/lib/docker/overlay2/cb37f96d8c4d6580faba935057636e928684d73ca58c53136a118918bddbb604/diff:/mnt/sda1/var/lib/docker/overlay2/df686dad04ba90e26a4bd48f64a9911f63547b205c7289d81fb55300aaacdbb4/diff", "MergedDir": "/mnt/sda1/var/lib/docker/overlay2/37ad581f24c8ec87f199192366c304f952ce27177477746a1d33875a1bd7d7c7/merged", "UpperDir": "/mnt/sda1/var/lib/docker/overlay2/37ad581f24c8ec87f199192366c304f952ce27177477746a1d33875a1bd7d7c7/diff", "WorkDir": "/mnt/sda1/var/lib/docker/overlay2/37ad581f24c8ec87f199192366c304f952ce27177477746a1d33875a1bd7d7c7/work" }, "Name": "overlay2" }, "Mounts": [ { "Type": "volume", "Name": "aae85a2f1e19aedc87713b76fca072247d04632ef0c17c44e7dd44ad4e46219c", "Source": "/mnt/sda1/var/lib/docker/volumes/aae85a2f1e19aedc87713b76fca072247d04632ef0c17c44e7dd44ad4e46219c/_data", "Destination": "/data", "Driver": "local", "Mode": "", "RW": true, "Propagation": "" } ], "Config": { "Hostname": "2bdabc272ec3", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "6379/tcp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "GOSU_VERSION=1.10", "REDIS_VERSION=5.0.3", "REDIS_DOWNLOAD_URL= http://download.redis.io/releases/redis-5.0.3.tar.gz";, "REDIS_DOWNLOAD_SHA=e290b4ddf817b26254a74d5d564095b11f9cd20d8f165459efa53eb63cd93e02" ], "Cmd": [ "redis-server" ], "ArgsEscaped": true, "Image": "redis", "Volumes": { "/data": {} }, "WorkingDir": "/data", "Entrypoint": [ "docker-entrypoint.sh" ], "OnBuild": null, "Labels": {} }, "NetworkSettings": { "Bridge": "", "SandboxID": "d45841da711498d7de27f9d6050c9b5a873e527cb683075277a9fb8621c1dd30", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": { "6379/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "6379" } ] }, "SandboxKey": "/var/run/docker/netns/d45841da7114", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "11ad8c469ed5fc9d9ec1b796fe6853b91a8d61915a66f77763073f5f5535000f", "Gateway": "172.17.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "172.17.0.2", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:ac:11:00:02", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "354ba15e8a867d659da1a3093bd5ddb71df450b6dbb070edf492d980fdaf2c69", "EndpointID": "11ad8c469ed5fc9d9ec1b796fe6853b91a8d61915a66f77763073f5f5535000f", "Gateway": "172.17.0.1", "IPAddress": "172.17.0.2", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:ac:11:00:02", "DriverOpts": null } } } } ] -- Yuval B -- You received this message because you are subscribed to the Google Groups "Django users" group. 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