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Enabling the HostPath Mapper

Vcluster internal logging relies on a separate component called the Hostpath Mapper. This will make sure to resolve the correct virtual pod and container names to their physical counterparts. To deploy this component, its basically a 2 step process

Update the vCluster

You would want to create the vCluster with the following values.yaml:

- --mount-physical-host-paths=true
  • For new vCluster run vcluster create <vcluster_name> -f values.yaml
  • For existing vCluster run vcluster create --upgrade <vcluster_name> -f values.yaml

Deploy the Hostpath Mapper Daemonset

Now that the vCluster itself is ready, we can deploy the hostpath mapper component. We need the following 2 pieces of information for this:

  • The Hostpath Mapper has to be deployed in the same namespace and the target vCluster
  • We need to set the .Values.VclusterReleaseName value when deploying this helm chart equal to the name of the target vCluster

To sum up, if your vCluster is named my-vcluster and is deployed in namespace my-namespace then you should run

helm install vcluster-hpm vcluster-hostpath-mapper \
--repo \
-n my-namespace \
--set VclusterReleaseName=my-vcluster

Once deployed successfully a new Daemonset component of vCluster would start running on every node used by the vCluster workloads.

We can now install our desired logging stack and start collecting the logs.