Using kwok docker image with docker-compose

[orudi]

Hi!
What would be a good way to use kwok docker image with docker-compose and have an ability to call kwok functionality from other containers? I have not discovered if kwok exposes some network api (rest, socket), so the only thing that comes to mind is to use sshd. So I tried to use custom Dockerfile

FROM registry.k8s.io/kwok/cluster:v1.26.0

RUN apk add --update --no-cache openrc openssh
RUN echo 'PasswordAuthentication yes' >> /etc/ssh/sshd_config
RUN echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config
RUN echo 'root:SophisticatedPassword42' | chpasswd

ENTRYPOINT ["/entrypoint.sh"]
EXPOSE 22
COPY entrypoint.sh /

and I also took the entrypoint file from base docker image and added 2 lines at the start to call sshd in the backgroud

ssh-keygen -A
/usr/sbin/sshd -D -e &

The resulted docker image starts, and is able to accept ssh session. But then I discovered that there is an error with cluster creation

053b0b459174:# kwokctl create cluster --name kl_2
Creating cluster cluster="kl_2"
Pull image cluster="kl_2" image="registry.k8s.io/etcd:3.5.6-0"
ERROR Failed to setup config cluster="kl_2" err="docker pull registry.k8s.io/etcd:3.5.6-0: exec: "docker": executable file not found in $PATH"
Cluster is cleaned up cluster="kl_2"
ERROR Execute exit err="docker pull registry.k8s.io/etcd:3.5.6-0: exec: "docker": executable file not found in $PATH"
053b0b459174:#

So something is not correct wiht this setup.

[wzshiming]

kwok/images/cluster/Dockerfile

Lines 43 to 49 in 64d08be

	ENV KWOK_CONTROLLER_BINARY /usr/local/bin/kwok
	ENV KWOK_KUBE_APISERVER_PORT 8080
	ARG kube_version
	ENV KWOK_KUBE_VERSION $kube_version
	ENV KWOK_RUNTIME binary

These env variables should be needed to allow kwokctl to use binary runtime

[wzshiming]

#261

Exposing the ports of components will be supported in the next release