(Tried to respond right after getting your response, however, I have my
message in "sent items" but nothing more... I wonder if there is a filter I
managed to hit having my response blocked... Si I will re-write:)
Thank you!
I have installed docker on my PC and I run it locally.
At setting.py I have:
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
# "hosts": [('172.17.0.1', 6379)],
"hosts": [('127.0.0.1', 6379)],
},
},
}
- I am running a windows os,
- With docker installation I got a "Docker Quickstart Terminal". This
terminal looks like a unix shell (So I am using unix commands inside this
shell)
- This configuration is the exact configuration that is described at
the channels tutorial
- I run the docker commands in this shell (as you have seen)
- As for "python manage.py shell" and running the set of commands
causing the failure I have described: It happens both when I am
running the
python shell at this Docker terminal or a normal windows CMD
- I am running "Microsoft Windows 10 home" 64 bits. The fact that it is
the "home" version can be part of the problem I have, however, while 64 bit
support is required (docker), there is no limitation as for "home".
-
- I also think that it is likely that I have a communication
problem between the redis server running inside the docker
container and
the client outside but I can't tell fore sure ( "It looks
network/local
environment related rather than something redis/docker specific")
- As mentioned before, I see the problem also when running the
python shell from " Docker Quickstart Terminal"
- I have suspended windows defender firewall" and executed
the commands inside the python shell again: I still have
the problem
- when trying to use runserver (instead of shell) and trying to
access the site via chrome I get an error message " Chat
socket closed
unexpectedly" – I assume it is a symptom of the same problem. (I
also get a warning “chrome.loadTimes() is deprecated, instead use
standardized API: nextHopProtocol in Navigation)”
- How can I check this communication? I would use telnet but I
am not sure how to use telenet to test the viability of
redis and the
connectivity to it
On Tue, Jan 15, 2019 at 7:32 PM Roger Gammans <rgamm...@gammascience.co.uk>
wrote:
>
> Hi Yuval
>
> Are you using docker machine ? If so the redis server is on the docker
> machine's IP not on the localhost so you would need to update the docker
> host in the CHANNEL_LAYERS portion of settings.py.
>
> You show a unix-like shell like for controlling docker; but the connect
> failed error looks very windowssy; so I'm not sure that the docker engine
> (daemon) and the python is running on the TCP stack (or kernel/VM) which
> you would need for the local host connection to work. Also it might be
> sensible to ensure the connection is being block by a local firewall if you
> have one.
>
> It looks network/local environment related rather than something
> redis/docker specific. The error show the TCP connection (which you can
> test with telnet if you have it install) not be made between python and the
> redis deamon the most likely reason for that is a local firewall or a more
> complex environment.
>
>
> --
>
> Roger Gammans <rgamm...@gammascience.co.uk>
> Gamma Science
>
>
> On Tue, 2019-01-15 at 18:49 +0200, Yuval Bachrach wrote:
>
> I did not configure anything, which is probably the problem..
> I am following the tutorial. I just did what the tutorial instructed to
> do: So I have installed docker as instructed but haven't configured
> anything. The tutorial calls installing docker and does not state any
> action to take after installing....)
> as I am not familiar with docker, could not tell if there is a need to
> configure anything to make django channels work. I still need to do
> whatever is required to make the tutorial work.Do I need to learn basics of
> docker first, or are there some simple things I can do to enable the
> environment and keep going with the channels tutorial?
>
> On Tue, Jan 15, 2019 at 6:38 PM PASCUAL Eric <eric.pasc...@cstb.fr> wrote:
>
> Hi,
>
>
> How is configured your Docker stack exactly ? You should have several
> containers in it, at least one for the Redis server, another one for the
> Django app.
>
>
> Do you use docker-compose to run the stack ? If yes, could you provide the
> YAML descriptor of the stack ?
>
>
> Best
>
>
> Eric
>
>
> ------------------------------
> *From:* django-users@googlegroups.com <django-users@googlegroups.com> on
> behalf of Yuval Bachrach <yuval.bachr...@gmail.com>
> *Sent:* Tuesday, January 15, 2019 5:31:18 PM
> *To:* django-users@googlegroups.com
> *Subject:* channnels -- communication with redis
>
>
> 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
>
> --
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--
Yuval B
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