I have not seen any documentation of a multi-container pod application on helm charts. Can anyone point on how to do this?
Something like this https://linchpiner.github.io/k8s-multi-container-pods.html or https://www.mirantis.com/blog/multi-container-pods-and-container-communication-in-kubernetes/
So basically have a pod with multiple containers.
Does helm charts support this?
UPDATE: I have been able to deploy pod now using this help (finally sample pod definition)
https://github.com/helm/charts/blob/master/stable/keycloak/templates/test/test-pod.yaml
but how do i have replicas like increase number of pods i launch kind of like deployment.yaml file?
It should be supported in the templates essentially use the templates with multiple containers in the Pod spec. That Pod spec can also be in other abstractions like Deployments, DaemonSets, StatefulSets, etc.
Example:
https://github.com/helm/charts/blob/master/stable/mysql/templates/deployment.yaml https://github.com/helm/charts/blob/master/stable/lamp/templates/deployment.yaml
and a few more here:
https://github.com/helm/charts/tree/master/stable
You can scale your deployment replicas like this:
kubectl scale deployment mysql-deployment --replicas=10More on that here
On the template you can specify replicas in the deployment spec.
For example:
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: my-dep
namespace: kube-system
labels:
k8s-app: my-app
spec:
replicas: 1 <= here
selector:
matchLabels:
k8s-app: my-app
template:
metadata:
labels:
k8s-app: my-app
name: my-app
spec:
serviceAccountName: mysa
terminationGracePeriodSeconds: 60
containers:
- image: mycontainer
name: myappcontainer
ports:
- name: http
containerPort: 80
- name: admin
containerPort: 8080
args:
- --opt1
- --opt2
- --opt3
- image: mycontainer2
name: myappcontainer2