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Ephemeral storage kubernetes12/1/2023 ![]() ![]() Create a file ephemeral-example.yaml with the following.To verify we will shell into the pod and verify the mounted folder path exists. In this example a volume will created only for the lifetime of the pod. > kubectl exec -it task-pv-pod - curl Hello from Kubernetes storage Persistentvolumeclaim/task-pv-claim created Create a file pv-pvc-example.yaml with the contents below. kube-reserved is typically a function of pod density on the nodes. It is not meant to reserve resources for system daemons that are run as pods. For brevity the PV, PVC and pod will be created in one file. kube-reserved is meant to capture resource reservation for kubernetes system daemons like the kubelet, container runtime, node problem detector, etc.> sudo sh -c "echo 'Hello from Kubernetes storage' > /mnt/data/index.html" Last login: Tue Jun 3 22:27:57 2023 from sudo mkdir /mnt/data We will prepare the volume to contain a html file which will be used to verify that the PV has been mounted correctly. In this example a persistent volume (PV) will be created and then a persistent volume claim (PVC) will be created for that PV and then finally a pod will be created using that PVC. Implementation: Persistent Volumes (PVs): Make sure minikube is up and running: minikube start I also setup a alias for kubectl using the following command: Set-Alias -Name k -Value kubectl To run the example I had the following tools/software installed: They are mounted into a specific Pod and are not accessible by other Pods.Ephemeral Volumes do not require manual provisioning or configuration.They are ideal for storing non-persistent and short-lived data, such as caching, temporary files, or inter-pod communication.Ephemeral Volumes are created and deleted along with the lifecycle of the Pod that uses them.Key characteristics of Ephemeral Volumes: They have a shorter lifespan and are typically used for temporary or transient data within a Pod. PVs can be manually claimed by Persistent Volume Claims (PVCs) in Pods, allowing Pods to request and use the persistent storage.Įphemeral Volumes, also known as emptyDir volumes, are temporary storage volumes created by Kubernetes for individual Pods.PVs can be dynamically provisioned by using Storage Classes, which define the provisioning mechanism and characteristics.They are bound to a specific storage backend, such as network-attached storage (NAS), block devices, or cloud storage.They have a lifecycle independent of Pods, which means they persist data even if the Pod using them is terminated or deleted.Key characteristics of Persistent Volumes: PVs are provisioned by administrators and can be dynamically or statically provisioned. They are independent of any specific Pod and have a longer lifespan than Pods. ![]() Persistent Volumes are Kubernetes resources that provide storage for stateful applications. What are persistent and ephemeral volumes in Kubernetes? Persistent Volumes (PVs): ![]()
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