Menu
Is there any approach that one container can call command in another container? The containers are in the same pod.
I need many command line tools which are shipped as image as well as in packages. But I don’t want to install all of them into one container because of some concerns.
289
Multiple containers in the same Pod share the same IP address. They can communicate with each other by addressing localhost . For example, if a container in a Pod wants to reach another container in the same Pod on port 8080, it can use the address localhost:8080 .
Containers on same pod act as if they are on the same machine. You can ping them using localhost:port itself. Every container in a pod shares the same IP. You can `ping localhost` inside a pod.
Surprisingly or not, neither Docker nor Podman support exposing multiple containers on the same host's port right out of the box. Example: docker-compose failing scenario with "Service specifies a port on the host. If multiple containers for this service are created on a single host, the port will clash."
The Kubernetes model for connecting containersKubernetes assumes that pods can communicate with other pods, regardless of which host they land on. Kubernetes gives every pod its own cluster-private IP address, so you do not need to explicitly create links between pods or map container ports to host ports.
This is very possible as long as you have k8s v1.17+. You must enable shareProcessNamespace: true and then all the container processes are available to other containers in the same pod.
Here are the docs, have a look.
150
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
