The problem of building docker images based on native frr code

[liuyuefengcn]

I git clone the code, and build an ubuntu 20.04 container image "frr-ubuntu20", then run it. However I got some error, could someone help me to deal with this?

root@ubuntu20:/home# git clone https://https://github.com/FRRouting/frr.git
...
root@ubuntu20:/home# git checkout stable/9.0
root@ubuntu20:/home# cd frr
root@ubuntu20:/home/frr# docker build -t frr-ubuntu20:latest -f docker/ubuntu20-ci/Dockerfile .
...
root@ubuntu20:/home/frr# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
frr-ubuntu20 latest ff4c8e20aff2 23 minutes ago 1.73GB
...
root@ubuntu20:/home/frr# docker run -d --privileged --name frr-ubuntu20 --mount type=bind,source=/lib/modules,target=/lib/modules frr-ubuntu20:latest
...
root@ubuntu20:/home/frr# sudo docker exec -it frr-ubuntu20 vtysh
% Can't open configuration file /etc/frr/vtysh.conf due to 'No such file or directory'.
Configuration file[/etc/frr/frr.conf] processing failure: 11
Exiting: failed to connect to any daemons.
Hint: if this seems wrong, try running me as a privileged user!

root@ubuntu20:/home/frr# docker exec -it frr-ubuntu20 bash
frr@684e889050cf:/$ ps
PID TTY TIME CMD
50 pts/0 00:00:00 bash
57 pts/0 00:00:00 ps
frr@684e889050cf:/$

For comparison, I downloaded the official image version frrouting/frr:v8.2.2 to run directly, which is normal.

root@ubuntu20:/home/frr# docker exec -it clab-frrlab-router1 vtysh
% Can't open configuration file /etc/frr/vtysh.conf due to 'No such file or directory'.

Hello, this is FRRouting (version 8.2.2_git).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

router1#

root@ubuntu20:/home/frr# docker exec -it clab-frrlab-router1 bash
bash-5.1# ps
PID USER TIME COMMAND
1 root 0:02 /sbin/tini -- /usr/lib/frr/docker-start
8 root 0:00 {docker-start} /bin/bash /usr/lib/frr/docker-start
40 root 0:13 /usr/lib/frr/watchfrr zebra bgpd ospfd isisd ldpd staticd bfdd
67 frr 0:01 /usr/lib/frr/zebra -d -F traditional -A 127.0.0.1 -s 90000000
105 frr 0:00 /usr/lib/frr/ldpd -L -u frr -g frr
106 frr 0:00 /usr/lib/frr/ldpd -E -u frr -g frr
109 frr 0:01 /usr/lib/frr/ldpd -d -F traditional -A 127.0.0.1
110 frr 0:01 /usr/lib/frr/bfdd -d -F traditional -A 127.0.0.1
112 frr 0:01 /usr/lib/frr/isisd -d -F traditional -A 127.0.0.1
116 frr 0:01 /usr/lib/frr/ospfd -d -F traditional -A 127.0.0.1
118 frr 0:01 /usr/lib/frr/bgpd -d -F traditional -A 127.0.0.1
138 frr 0:01 /usr/lib/frr/staticd -d -F traditional -A 127.0.0.1
151 root 0:00 vtysh
169 root 0:00 bash
175 root 0:00 ps
bash-5.1#

[ton31337]

Ubuntu Docker builds are not well maintained, please use Alpine images. There are prepared build scripts, and even more they are used for building production (release) images. Ubuntu images are just for CI, it doesn't run daemons, and docker-start is not adopted for what you are expected.

[liuyuefengcn]

Okay, thank you for your answer.