K8S集群实践之九: Ceph

Rook is an open source cloud-native storage orchestrator, providing the platform, framework, and support for Ceph storage to natively integrate with cloud-native environments.1. 说明

因香橙派和树莓派资源所限，转移到基于VirtualBox建立的VMs继续实践。

虚拟机环境列表:

|----------------|----------|-------------------------------------------------|-----|
| Host Name | IP | 配置 | 备注 |
| k8s-c0-master0 | 10.0.3.6 | Ubuntu 22.04.3 LTS 8核32G, 200G(sda) + 100G(sdb) | 虚拟机 |
| k8s-c0-node0 | 10.0.3.7 | Ubuntu 22.04.3 LTS 4核8G, 200G(sda) + 100G(sdb) | ... |
| k8s-c0-node1 | 10.0.3.8 | Ubuntu 22.04.3 LTS 4核8G, 200G(sda) + 100G(sdb) | ... |

2. 准备工作

• 下载 ubuntu-22.04.2-live-server-amd64.iso，并映射到启动光盘

• 虚拟机设置双网卡，1作桥接(同网访问)，1作NAT网络（K8s内网）

• 安装时选择镜像（重要）https://mirrors.aliyun.com/ubuntu

• 初始化K8s环境

• 为避免CTR拉取镜像失败，设置容器代理，编辑 /lib/systemd/system/containerd.service

  [Service]
  Environment="HTTP_PROXY=http://192.168.0.108:1081"
  Environment="HTTPS_PROXY=http://192.168.0.108:1081"
  Environment="NO_PROXY=aliyun.com,aliyuncs.com,huaweicloud.com,k8s-master-0,k8s-master-1,k8s-worker-0,localhost,127.0.0.1,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16"
  
  systemctl daemon-reload && systemctl restart containerd
  

3. 方案及安装步骤

3.1 Rook

Rook is an open source cloud-native storage orchestrator, providing the platform, framework, and support for Ceph storage to natively integrate with cloud-native environments.

3.2 安装要求

• Raw devices (no partitions or formatted filesystems)
• Raw partitions (no formatted filesystem)
• LVM Logical Volumes (no formatted filesystem)
• Persistent Volumes available from a storage class in block mode

一句话：有个裸盘 （100G /dev/sdb）

3.3 安装步骤

1. 获取rook仓库到安装路径，如：/k8s_apps/rook

   git clone --single-branch --branch v1.12.6 https://github.com/rook/rook.git

2. 编写安装脚本，/k8s_apps/scripts/k8s-rook-ceph.sh

   #!/bin/bash

   kubectl apply -f /k8s_apps/rook/deploy/examples/crds.yaml
   kubectl apply -f /k8s_apps/rook/deploy/examples/common.yaml
   kubectl apply -f /k8s_apps/rook/deploy/examples/operator.yaml

   kubectl -n rook-ceph get pod

   kubectl apply -f /k8s_apps/rook/deploy/examples/cluster.yaml

3. 编写删除脚本，/k8s_apps/scripts/rook-ceph-delete.sh

   #!/bin/bash

   kubectl delete -f /k8s_apps/rook/deploy/examples/wordpress.yaml
   kubectl delete -f /k8s_apps/rook/deploy/examples/mysql.yaml
   kubectl delete -n rook-ceph cephblockpool replicapool
   kubectl delete storageclass rook-ceph-block
   kubectl delete -f /k8s_apps/rook/deploy/examples/csi/cephfs/kube-registry.yaml
   kubectl delete storageclass csi-cephfs

   kubectl -n rook-ceph patch cephcluster rook-ceph --type merge -p '{"spec":{"cleanupPolicy":{"confirmation":"yes-really-destroy-data"}}}'

   kubectl -n rook-ceph delete cephcluster rook-ceph

   kubectl -n rook-ceph get cephcluster

   kubectl delete -f /k8s_apps/rook/deploy/examples/operator.yaml
   kubectl delete -f /k8s_apps/rook/deploy/examples/common.yaml
   kubectl delete -f /k8s_apps/rook/deploy/examples/crds.yaml

4. 执行安装，一切正常的话，如下图，不正常的话，执行删除脚本，排除问题后重来。

4. 参考

• Rook - Rook Ceph Documentation