Need detail understanding of the below POD definition file : Around volume mount

Kubernetes
#1

apiVersion: v1
kind: Pod
metadata:
name: webapp
spec:
containers:

  • name: event-simulator
    image: kodekloud/event-simulator
    env:
    • name: LOG_HANDLERS
      value: file

Need to get a better understanding on the below volumemounts and volumes in the below . Are we creating a volume ? What is mount path and hostpath ?

volumeMounts:
- mountPath: /log
  name: log-volume

volumes:

  • name: log-volume
    hostPath:

    directory location on host

    path: /var/log/webapp

    this field is optional

    type: Directory
#2

Hi @shashikaushal2006123

Volumes are persistent data stores for containers. A Pod can use many volume types simultaneously. You can create a volume hostPath that mounts a file or directory from the host node’s filesystem into your Pod using volumeMounts.

To make this file/Directories available to the container, ty need to mount that into the container filesystem. That’s what volumeMounts does.

I suggest you go through the official docs on volumes and revisit some CKA lectures on storage and how those are provided to the containers.

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#3

You can create a volume hostPath that mounts a file or directory from the host node’s filesystem into your Pod using volumeMounts .

Just would like to understand the below in more detail :

/var/log/webapp is a directory on the local node . What is this name:log-volume ?

Are we saying that the directory path /var/log/webapp is a volume with name log-volume ?

  • name: log-volume
    hostPath:

directory location on host

path: /var/log/webapp

this field is optional

type: Directory

#4

volumes.name is an identifier for the Volume you’ve provisioned with a volume.hostPath: /var/log/webapp as the dir from the host.

Consider this, There are multiple Volumes created for different purposes, one for log, one for creds, etc. Now you need to mount these volumes to a container at a specific mountPath. volumeMounts.name is used to link the correct volume to the container’s mountPath, ensuring the intended volume is mounted at the specified location.

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