Kubernetes project longhorn

Longhorn is lightweight, reliable, and powerful distributed block storage system for Kubernetes..

Parst of the Kubernetes series

You can install Longhorn on an existing Kubernetes cluster with one kubectl apply command or using Helm charts. Once Longhorn is installed, it adds persistent volume support to the Kubernetes cluster.

Install dependency

yum install iscsi-initiator-utils

modprobe iscsi_tcp
echo "iscsi_tcp" >/etc/modules-load.d/iscsi-tcp.conf

Deploy Longhorn and storageclass

kubectl apply -f https://raw.githubusercontent.com/rancher/longhorn/master/deploy/longhorn.yaml
kubectl apply -f https://raw.githubusercontent.com/rancher/longhorn/master/examples/storageclass.yaml

kubectl get storageclass
NAME       PROVISIONER          RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
longhorn   driver.longhorn.io   Delete          Immediate           false                  11m

Patch longhorn storageclass to be the default storageclass.

kubectl patch storageclass longhorn -p \
  '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

kubectl get storageclass
NAME                 PROVISIONER          RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
longhorn (default)   driver.longhorn.io   Delete          Immediate           false                  12m

Deploy admin gui

kubectl -n longhorn-system get svc

cat minio-sec.yaml
---
apiVersion: v1
kind: Secret
metadata:
  namespace: longhorn-system
  name: longhorn-minio
type: Opaque
data:
  AWS_ACCESS_KEY_ID: bWluaW8=
  AWS_SECRET_ACCESS_KEY: bWluaW8xMjM=
  AWS_ENDPOINTS: aHR0cDovL21pbmlvLmxvbmdob3JuLXN5c3RlbTo5MDAw

Example image
Example image
Example image