Trying one more time: I don't see my response at my inbox so others may not
have it as well...
(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
---------- Forwarded message ---------
From: Roger Gammans <rgamm...@gammascience.co.uk>
Date: Tue, Jan 15, 2019 at 7:32 PM
Subject: Re: channnels -- communication with redis
To: <django-users@googlegroups.com>
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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