使用docker-compose指定sysctl值

Question

I am trying to set a few sysctl values.
Basically the following

sysctl -w \
   net.ipv4.tcp_keepalive_time=300 \
   net.ipv4.tcp_keepalive_intvl=60 \
   net.ipv4.tcp_keepalive_probes=9

in a docker container.
When log into to the container directly and execute the command, I get the following error

sysctl: cannot stat /proc/sys/net/ipv4/tcp_keepalive_time: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/tcp_keepalive_intvl: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/tcp_keepalive_probes: No such file or directory

Then I found out the --sysctl option in docker run in here But I did not find the equivalent option via docker-compose. I have few services that start by default so using docker run instead of docker-compose is not an option for me.

Anyone knows of a way to supply --sysctl options to the container via compose?

Answer 1

This option is now available in docker-compose 1.10.0-rc1, you'll need to upgrade to that version ( pip install docker-compose==1.10.0-rc1 ) and also update your docker-compose.yml file to version 2.1 per docs

Example docker-compose.yml:

version: '2.1'
services:
    app:
        build: .
        sysctls:
            - net.ipv6.conf.all.disable_ipv6=1

Answer 2

docker-compose lacks many of the CLI options. In general, you have to head over to the github issues for compose and search there. In the case of sysctl , it's in the process of being added. Someone has made a branch with the addition . You could start with that until it gets added to the master branch.