I'm creating a kind cluster with kind create cluster --name kind
and I want to access it from another docker container but when I try to apply a Kubernetes file from a container (kubectl apply -f deployment.yml
) I got this error:
The connection to the server 127.0.0.1:6445 was refused - did you specify the right host or port?
Indeed when I try to curl kind control-plane from a container, it's unreachable.
> docker run --entrypoint curl curlimages/curl:latest 127.0.0.1:6445
curl: (7) Failed to connect to 127.0.0.1 port 6445 after 0 ms: Connection refused
However kind control-plane is publishing to the right port but only to the localhost.
> docker ps --format "table {{.Image}}\t{{.Ports}}"
IMAGE PORTS
kindest/node:v1.23.4 127.0.0.1:6445->6443/tcp
Currently the only solution I found is to set the host network mode.
> docker run --network host --entrypoint curl curlimages/curl:latest 127.0.0.1:6445
Client sent an HTTP request to an HTTPS server.
This solution don't look to be the most secure. Is there another way like connecting the kind network to my container or something like that that I missed ?
Don't have enough rep to comment on the other answer, but wanted to comment on what ultimately worked for me.
Takeaways
kind
host
network.kind-control-plane:6443
. The port is NOT the exposed port in the example below6443
NOT38669
Kube config for the container
Docker container stuff
If using docker-compose you can add the kind network to the container such as:
If running a new container:
Container already running?