Asterisk in Docker

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Revision as of 04:28, 25 February 2019 by Brian Wilson (talk | contribs)
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Read the Docker page if you don't know what Docker is.

Notes on building Asterisk executables from source, the old way: Building Asterisk. All this is built into my build-asterisk image and automated now.

Read the Twilio and Asterisk debugging pages too.

Building a configured Asterisk Docker container

I started with the github respoke/asterisk image as my starting point. Then I did my own version (brian32768/docker-build-asterisk in github or wildsong/asterisk in hub.docker.com) because I wanted to use the latest Asterisk and respoke does not appear to get updated.

On Bellman I keep the sources checked out here: source/docker/docker-build-asterisk

Once the 'build-asterisk' container is working, I push changes to github and a new copy will build at hub.docker.com automatically.

After version updates remember to tag which goes something like this On hub.docker.com create a new build when new Asterisk versions are released. 

git tag -a rel1.0.x -m 'release 1.0.x of build-asterisk'
git push origin rel1.0.x

Configuration

I keep a private git repo for this part because the current version is full of secrets. It's checked out as source/docker/docker-asterisk-wildsong with this command: 

git clone [email protected]:docker-asterisk-wildsong.git

Edit environment settings in the Dockerfile and adjust the j2 config files that were created originally for Vastra. The current configuration is entirely file based because my home phone system is relatively static so messing with MySQL just seems like extra work for no return.

The docker-asterisk container configures Asterisk based on templates in etc_asterisk. 

cd source/docker/docker-asterisk-wildsong
edit Dockerfile to adjust environment
cd etc_asterisk
edit files
cd ..
docker rm -f asterisk-wildsong
docker build -t asterisk-wildsong .

Start it up

Using the --net=host option is not a best practice because it exposes every port running on the docker machine. It means it looks like Asterisk is just running on Bellman, not inside a container. This is not 'best practices' but makes network problems go away. I am not sure if I need the "expose". 

docker run -d --net=host --expose 10000-10101 --name=asterisk asterisk-wildsong

You should be able to see the SIP port(s) exposed 

netstat -an |grep 5060
udp        0      0 0.0.0.0:5060            0.0.0.0:*
unix  2      [ ACC ]     STREAM     LISTENING     94552697 @/containerd-shim/moby/6de5485d98c7a6d642a10beead4e6111a8319f4ec9b84e8a23cf00ce9165060f/shim.sock@
unix  3      [ ]         STREAM     CONNECTED     94553455 @/containerd-shim/moby/6de5485d98c7a6d642a10beead4e6111a8319f4ec9b84e8a23cf00ce9165060f/shim.sock@

If it seems to work then set it to reboot: 

docker update --restart unless-stopped asterisk

Running some tests

Debugging mode

See also Asterisk debugging and Twilio. 

docker exec -it asterisk asterisk -r

bellman*CLI> core set debug 10
bellman*CLI> core set verbose 10

It's very useful to force a reload so you can see all the modules are loading correctly. 

bellman*CLI> core reload

It's also useful to look at what the dialplan is 

bellman*CLI> dialplan show

Outside call

From PBX to outside

  • Dial Twilio test numbers +1(650)489-4546 and +1(415)475-8378
  • Dial out to cellphone
  • Dial out to Google Voice

Outside to PBX

  • Try the Twilio origination Make a Call button.
  • Call from mobile to 707-827-0001
  • Is it being logged at Twilio? YES
  • Can I see the connection attempt in the Asterisk console? No
    • Can I see the connection attempt being forwarded through the firewall? Don't know yet
  • Two way audio?
  • TODO Set up SMS and MMS message gateways???


Inside call, to PBX

  • Press voicemail button. Does prompt come back? YES
    • TODO -- I want it configured to bypass the user/pass prompt.

Inside call, station to station

I have two stations registering right now, the GXV phones.

  • 100 Ring all phones
  • 101 Studio phone 192.168.123.80 on wire
  • 102 eLab phone 192.168.123.76 on WIFI
  • 850 voice mail
  • Call to voice mail works.
  • Calling station to station works.
  • TODO -- GET SMART PHONE set up. Currently it fails to register
[Nov  6 06:56:21] NOTICE[262]: res_pjsip/pjsip_distributor.c:659 log_failed_request: Request 'REGISTER' from '<sip:[email protected]>' failed for '192.168.123.207:13411' (callid: [email protected]) - Failed to authenticate
[Nov  6 06:56:21] NOTICE[262]: res_pjsip/pjsip_distributor.c:659 log_failed_request: Request 'REGISTER' from '<sip:[email protected]>' failed for '192.168.123.207:13411' (callid: [email protected]) - No matching endpoint found

Voicemail

Logins fail with this error. 

[Nov  6 06:54:09] WARNING[294][C-00000008]: app_voicemail.c:11191 vm_authenticate: Couldn't read username

Intercom calling

TODO

Console

You can connect to the Asterisk console directly with this command 

docker exec -it asterisk asterisk -r

Or you can run a sniffer 

docker exec -it asterisk tcpdump -n not arp

Connected phones

I don't know how to see what phones are registered with pjsip!??

I started a separate page for it, PJSIP.

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