docker_swarm_service: add support for sysctl parameter

[lem8r]

SUMMARY

Since Docker API 1.40 there is sysctl parameter for swarm services.

ISSUE TYPE

• Feature Idea

COMPONENT NAME

docker_swarm_service

ADDITIONAL INFORMATION

In some cases there is a need to configure service's sysctl parameters. In my case it is net.ipv4.tcp_keepalive_* for database service. To prevent closing TCP socket on long running requests.

It looks like so when starting from command line

docker service create \
my_service \
--sysctl net.ipv4.tcp_keepalive_time=600 \
--sysctl net.ipv4.tcp_keepalive_intvl=60 \
--sysctl net.ipv4.tcp_keepalive_probes=6 \
image:1.0

[WojciechowskiPiotr]

I think it is a good feature proposal. Will implement it in September.

[Ranger-X]

September is over :-)
Is there any news on this feature request?

[lem8r]

Year of September was not specified 🤷‍♂️

[WojciechowskiPiotr]

Hey. Sorry guys for the delay. I was overloaded with work lately, but I'm almost back to a normal level of work. Will take a look at it soon.

[WojciechowskiPiotr]

After further investigation, I found that sysctl is not implemented in https://github.com/docker/docker-py yet. This needs to be added there first so we can use it in the Ansible module.

I opened a request for this feature docker/docker-py#2907

[NairolfL]

Hello,
It seems that they implemented it a while ago now : docker/docker-py#3029
Would it be possible to add the parameter to docker_swarm_service ?

Thanks

[NairolfL]

#836 was merged, I think this can be closed :)

[lem8r]

@NairolfL Thank you!