Kubernetes云原生存储解决方案之 Rook Ceph实践探究

除了手动部署独立的 Ceph 集群并配置与Kubernetes进行对接外，Rook Ceph 支持直接在 Kubernetes 集群上部署 Ceph 集群。

通过Rook Ceph云原生存储编排平台，使得 Kubernetes 集群中启用高可用的 Ceph 存储，为 Kubernetes 应用程序提供块存储、对象存储和文件存储服务。

Rook高可用架构：

1. 准备工作

1.1 前提

1. Kubernetes版本

Rook 可以安装在任何现有的 Kubernetes 集群上，只要它满足最低版本，并且授予 Rook 所需的权限。早期 v1.9.7 版本的 Rook 支持 Kubernetes v1.17 或更高版本；现在的 v1.15 版本支持 Kubernetes v1.25 到 v1.30版本。

2. CPU 架构

支持的架构：amd64 / x86_64 ， arm64.

3. Ceph 部署前提

要配置 Ceph 存储集群，需要至少一种以下类型的本地存储：

• 原始设备（没有分区或格式化的文件系统）
• 原始分区（没有格式化的文件系统）
• LVM 逻辑卷（没有格式化的文件系统）
• 从 block 模式的存储类中提供的持久卷

使用以下命令确认分区或设备是否已格式化文件系统：

root@k8s-1:~# lsblk -f
NAME   FSTYPE   LABEL    UUID                                 FSAVAIL FSUSE% MOUNTPOINT                          
vda                                                                          
├─vda1                                                                       
└─vda2 ext4              2ec0411c-1071-4316-bed7-6f0afdf54814     22G    39% /
vdb                                                                          
vdc 

如果 FSTYPE 字段不为空，则表示对应的设备上有文件系统。在此示例中，vdb 、vdc对 Rook 可用，而 vda 及其分区已有文件系统，不可用。

如果需要清理已有磁盘给 Ceph 使用，请使用下面的命令（生产环境请谨慎）：

# yum install gdisk
sgdisk --zap-all /dev/sdd

4. LVM需求

在以下情况下，Ceph OSD 依赖于 LVM：

• 如果启用了加密（集群 CR 中的 encryptedDevice: "true"）
• 指定了 metadata 设备
• osdsPerDevice 大于 1

在以下情况下，OSD 不需要 LVM：

• OSD 是在原始设备或分区上创建的
• OSD 是在使用 storageClassDeviceSets 的 PVC 上创建的

如果需要 LVM，则需要在将运行 OSD 的主机上提供 LVM。一些 Linux 发行版不自带 lvm2 包。这个包在 Kubernetes 集群的所有存储节点上都是必需的，以便运行 Ceph OSD。没有这个包，即使 Rook 能够成功创建 Ceph OSD，当节点重新启动时，运行在重新启动节点上的 OSD Pod 将 无法启动。请使用 Linux 发行版的包管理器安装 LVM。例如：

CentOS:

sudo yum install -y lvm2

Ubuntu:

sudo apt-get install -y lvm2

5. 内核需求

RBD

Ceph 需要一个构建了 RBD 模块的 Linux 内核，许多较新的 Linux 发行版都包含这个模块，但并非所有。通过运行 modprobe rbd 来测试你的 Kubernetes 节点。如果找不到 rbd 模块，则需要重新构建内核以包含 rbd 模块，安装更新的内核，或者选择不同的 Linux 发行版。

在用于存储节点的机器通过如下命令加载 rbd 模块：

# 加载 rbd 和 nbd 模块
]# modprobe rbd
]# modprobe nbd

# 开机自动加载 rbd 和 nbd 模式
]# echo "rbd" >> /etc/modules-load.d/rook-ceph.conf
]# echo "nbd" >> /etc/modules-load.d/rook-ceph.conf

# 查看rbd模块
]# lsmod | grep rbd

# 正确的输出结果类似如下：
]# lsmod | grep rbd
rbd                   106496  0
libceph               327680  1 rbd

Rook 的默认 RBD 配置仅指定了分层功能，以便与较旧的内核广泛兼容。如果你的 Kubernetes 节点运行的是 5.4 或更高版本的内核，可以在存储类中启用其他功能标志。fast-diff 和 object-map 功能尤其有用。

imageFeatures: layering,fast-diff,object-map,deep-flatten,exclusive-lock

CephFS

如果从 Ceph 共享文件系统（CephFS）创建 RWX 卷，推荐的最低内核版本是 4.17。如果内核版本低于 4.17，请求的 PVC 大小将不会被强制执行。存储配额仅在更新的内核上得到强制执行。

1.2 部署环境准备

主机名	IP	OS	CPU	内存	系统盘	数据盘	用途
k8s-1	192.168.1.55	ubuntu 20.04.2 5.4.0-81-generic	4	8	40		KubeSphere/k8s-control-plane
k8s-2	192.168.1.56	ubuntu 20.04.2 5.4.0-81-generic	4	8	40		KubeSphere/k8s-control-plane
k8s-3	192.168.1.57	ubuntu 20.04.2 5.4.0-81-generic	4	8	40		KubeSphere/k8s-control-plane
k8s-4	192.168.1.58	ubuntu 20.04.2 5.4.0-81-generic	4	8	40	50Gx2	k8s-worker/Ceph
k8s-5	192.168.1.59	ubuntu 20.04.2 5.4.0-81-generic	4	8	40	50Gx2	k8s-worker/Ceph
k8s-6	192.168.1.60	ubuntu 20.04.2 5.4.0-81-generic	4	8	40	50Gx2	k8s-worker/Ceph

说明

本文的master节点取消NoSchedule的taint以便用于部署测试应用，正式环境建议部署单独的worker节点承载业务应用。

测试境涉及的软件版本信息如下：

• 操作系统：ubuntu 20.04.2 x86_64
• 内核：5.4.0-81-generic
• Kubernetes：v1.27.4
• Containerd：1.6.4
• Rook：v1.15.2
• Ceph: 18.2.4 reef (stable)

1.3 Rook 部署规划

为了更好地满足生产环境的实际需求，在规划和部署存储基础设施时增加了以下策略：

• 节点扩展：向 Kubernetes 集群中新增三个专用节点，这些节点将专门承载 Ceph 存储服务，确保存储操作的高效性和稳定性。
• 组件隔离：所有 Rook 和 Ceph 组件以及数据卷将被部署在这些专属节点上，实现组件的清晰隔离和专业化管理。
• 节点标签化：为每个存储节点设置了专门的标签，例如 role=storage-node，以便 Kubernetes 能够智能地调度相关ceph相关管理组件。非存储节点设置标签，例如 role=rook-ceph，用于承载 Ceph CSI 插件，使得运行在这些节点上的业务 Pod 能够利用 Ceph 提供的持久化存储。
• 存储介质配置：在每个存储节点上增加2块 500G 的 Ceph 专用数据盘 /dev/vdb和/dev/vdc。为保证最佳性能，该磁盘将采用裸设备形态直接供 Ceph OSD 使用，无需进行分区或格式化。

重要提示：

• 本文提供的配置和部署经验对于理解 Rook-Ceph 的安装和运行机制具有参考价值。强烈建议不要将本文描述的配置直接应用于任何形式的生产环境。
• 在生产环境中，还需进一步考虑使用 SSD、NVMe 磁盘等高性能存储介质；细致规划故障域；制定详尽的存储节点策略；以及进行细致的系统优化配置等。

2. 节点规划

将集群中的三台master节点用作存储节点，下面设置节点标签：

# 管理节点标签，用于安装ceph CSI插件
kubectl label nodes k8s-1 role=rook-ceph
kubectl label nodes k8s-2 role=rook-ceph
kubectl label nodes k8s-3 role=rook-ceph
# 查看label
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get node k8s-3 --show-labels
NAME    STATUS   ROLES           AGE   VERSION   LABELS
k8s-3   Ready    control-plane   22h   v1.27.4   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-3,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node.kubernetes.io/exclude-from-external-load-balancers=,role=rook-ceph

# worker节点标签，用于安装存储节点，ceph管理组件也安装到上面
kubectl label nodes k8s-4 role=storage-node
kubectl label nodes k8s-5 role=storage-node
kubectl label nodes k8s-6 role=storage-node
# 查看label
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get node k8s-6 --show-labels
NAME    STATUS   ROLES    AGE   VERSION   LABELS
k8s-6   Ready    <none>   22h   v1.27.4   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-6,kubernetes.io/os=linux,role=storage-node

说明：

测试环境也可以将ceph管理组件部署到k8s控制节点，生产环境中建议专门规划三个存储性能好的节点用于安装部署ceph集群。 CSI 插件仅部署到需要存储功能的业务节点上。

3. 安装配置 Rook Ceph Operator

下面通过Rook Ceph Operator进行rook ceph的部署测试。

3.1 下载部署代码

这里选用截止本文测试时最新的v1.15.2版本。

mkdir rook-ceph; cd rook-ceph
wget https://github.com/rook/rook/archive/refs/tags/v1.15.2.tar.gz
tar xvf v1.15.2.tar.gz
cd rook-1.15.2/deploy/examples/

3.2 修改镜像地址(可选配置)

如果访问dockerhub、quay.io和registry.k8s.io镜像仓库受限，可以将 Rook-Ceph 需要的镜像离线下载后导入到本地仓库，部署时修改镜像地址。

# 备份源文件operator.yaml
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cp operator.yaml operator.yaml.bak

# 查看默认的镜像地址
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# grep -n "docker.io\|quay.io\|registry.k8s.io" operator.yaml 
130:  # ROOK_CSI_CEPH_IMAGE: "quay.io/cephcsi/cephcsi:v3.12.2"	# 这里注意版本号带v，否则拉去不到镜像
131:  # ROOK_CSI_REGISTRAR_IMAGE: "registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.11.1"
132:  # ROOK_CSI_RESIZER_IMAGE: "registry.k8s.io/sig-storage/csi-resizer:v1.11.1"
133:  # ROOK_CSI_PROVISIONER_IMAGE: "registry.k8s.io/sig-storage/csi-provisioner:v5.0.1"
134:  # ROOK_CSI_SNAPSHOTTER_IMAGE: "registry.k8s.io/sig-storage/csi-snapshotter:v8.0.1"
135:  # ROOK_CSI_ATTACHER_IMAGE: "registry.k8s.io/sig-storage/csi-attacher:v4.6.1"
513:  # ROOK_CSIADDONS_IMAGE: "quay.io/csiaddons/k8s-sidecar:v0.9.1"
607:          image: docker.io/rook/ceph:v1.15.2

# 取消镜像注释，并替换镜像地址前缀。根据上述查到的行号进行替换。
sed -i '130,135s/^.*#/ /g' operator.yaml
sed -i '513,513s/^.*#/ /g' operator.yaml

# 替换镜像仓库
sed -i 's#registry.k8s.io#10.210.10.210#g' operator.yaml
sed -i 's#quay.io#10.210.10.210#g' operator.yaml
sed -i 's#docker.io#10.210.10.210#g' operator.yaml

# 查看替换后的镜像地址
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# grep -n "10.210.10.210" operator.yaml 
130:  ROOK_CSI_CEPH_IMAGE: "10.210.10.210/cephcsi/cephcsi:v3.12.2"
131:  ROOK_CSI_REGISTRAR_IMAGE: "10.210.10.210/sig-storage/csi-node-driver-registrar:v2.11.1"
132:  ROOK_CSI_RESIZER_IMAGE: "10.210.10.210/sig-storage/csi-resizer:v1.11.1"
133:  ROOK_CSI_PROVISIONER_IMAGE: "10.210.10.210/sig-storage/csi-provisioner:v5.0.1"
134:  ROOK_CSI_SNAPSHOTTER_IMAGE: "10.210.10.210/sig-storage/csi-snapshotter:v8.0.1"
135:  ROOK_CSI_ATTACHER_IMAGE: "10.210.10.210/sig-storage/csi-attacher:v4.6.1"
513:  ROOK_CSIADDONS_IMAGE: "10.210.10.210/csiaddons/k8s-sidecar:v0.9.1"
607:          image: 10.210.10.210/rook/ceph:v1.15.2

说明：

上述10.210.10.210为本地的harbor镜像仓库地址，确保本地对应项目下存在对应组件版本的镜像。本次使用到的容器镜像列表如下：

quay.io/cephcsi/cephcsi:v3.12.2
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.11.1
registry.k8s.io/sig-storage/csi-resizer:v1.11.1
registry.k8s.io/sig-storage/csi-provisioner:v5.0.1
registry.k8s.io/sig-storage/csi-snapshotter:v8.0.1
registry.k8s.io/sig-storage/csi-attacher:v4.6.1
quay.io/csiaddons/k8s-sidecar:v0.9.1
docker.io/rook/ceph:v1.15.2
quay.io/ceph/ceph:v18.2.4

可以提前下载上述镜像并重新打tag推送到内部的镜像仓库。

3.3 修改自定义配置

修改配置文件 operator.yaml ，修改下面亲和性相关配置，和上述的label对应：

# rook-ceph 所有管理组件部署在指定标签节点
CSI_PROVISIONER_NODE_AFFINITY: "role=storage-node"

# k8s 其他节点安装 Ceph CSI Plugin
CSI_PLUGIN_NODE_AFFINITY: "role=rook-ceph"

3.4 部署 Rook Operator

# 部署 Rook operator
kubectl create -f crds.yaml -f common.yaml -f operator.yaml

# 查看rook-ceph-operator容器状态
kubectl -n rook-ceph get pod -o wide

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph get pod -o wide
rook-ceph-operator-b86bf6d58-t24kr  1/1     Running     0    31m   172.25.173.11    k8s-5   <none>   <none>

4. 创建 Ceph 集群

4.1 修改集群配置文件

修改集群配置文件 cluster.yaml，增加节点亲和配置，取消下面位置的注释，并配置key和vlaues部分的值。

placement:
  all:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: role
            operator: In
            values:
            - storage-node

修改集群配置文件 cluster.yaml，增加存储节点和 OSD 磁盘配置。

storage: # cluster level storage configuration and selection
  useAllNodes: false  # 生产环境，一定要修改，默认会使用所有节点
  useAllDevices: false # 生产环境，一定要修改，默认会使用所有磁盘
  #deviceFilter:
  config:
    storeType: bluestore	# 添加
  nodes:	# 配置节点名和对应磁盘
    - name: "k8s-4"
      devices:
        - name: "vdb"
        - name: "vdc"
    - name: "k8s-5"
      devices:
        - name: "vdb"
        - name: "vdc"
    - name: "k8s-6"
      devices:
        - name: "vdb"
        - name: "vdc"

4.2 创建 Ceph 集群

1. 创建集群

kubectl create -f cluster.yaml

2. 查看资源状态，确保所有相关 Pod 均为 Running

$ kubectl -n rook-ceph get pod -o wide

# 存储节点pod确认运行正常
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get pod -n rook-ceph -o wide | grep k8s-[4-6]
csi-cephfsplugin-provisioner-547c7c6d47-bpxqx     6/6     Running     2 (7m41s ago)   12m     172.25.133.206   k8s-6   <none>           <none>
csi-cephfsplugin-provisioner-547c7c6d47-tdbp8     6/6     Running     1 (11m ago)     12m     172.25.38.82     k8s-4   <none>           <none>
csi-rbdplugin-provisioner-574464dbfc-qb5s5        6/6     Running     1 (11m ago)     12m     172.25.38.81     k8s-4   <none>           <none>
csi-rbdplugin-provisioner-574464dbfc-szwnq        6/6     Running     2 (11m ago)     12m     172.25.173.15    k8s-5   <none>           <none>
rook-ceph-crashcollector-k8s-4-5cc6d79567-bb4zj   1/1     Running     0               7m36s   172.25.38.90     k8s-4   <none>           <none>
rook-ceph-crashcollector-k8s-5-77cb9fb554-ccrtd   1/1     Running     0               7m35s   172.25.173.23    k8s-5   <none>           <none>
rook-ceph-crashcollector-k8s-6-67684cd7b9-5rqfs   1/1     Running     0               8m7s    172.25.133.209   k8s-6   <none>           <none>
rook-ceph-exporter-k8s-4-5c7d9db66f-c8sdr         1/1     Running     0               7m32s   172.25.38.91     k8s-4   <none>           <none>
rook-ceph-exporter-k8s-5-98949968d-g9vm9          1/1     Running     0               7m31s   172.25.173.24    k8s-5   <none>           <none>
rook-ceph-exporter-k8s-6-57d8d78887-vwfd5         1/1     Running     0               8m7s    172.25.133.210   k8s-6   <none>           <none>
rook-ceph-mgr-a-69f4c7d775-9t8r8                  3/3     Running     0               8m24s   172.25.173.17    k8s-5   <none>           <none>
rook-ceph-mgr-b-6cd44fbf66-q4vpf                  3/3     Running     0               8m23s   172.25.38.84     k8s-4   <none>           <none>
rook-ceph-mon-a-5465966849-vcptl                  2/2     Running     0               16m     172.25.173.14    k8s-5   <none>           <none>
rook-ceph-mon-b-55d8f7bc5-bk5hq                   2/2     Running     0               15m     172.25.133.208   k8s-6   <none>           <none>
rook-ceph-mon-c-6cdc476964-l6p8r                  2/2     Running     0               10m     172.25.38.83     k8s-4   <none>           <none>
rook-ceph-operator-b86bf6d58-t24kr                1/1     Running     0               16m     172.25.173.11    k8s-5   <none>           <none>
rook-ceph-osd-0-6f8874b447-xknfs                  2/2     Running     0               7m36s   172.25.38.88     k8s-4   <none>           <none>
rook-ceph-osd-1-c7d85858b-7w4hb                   2/2     Running     0               7m35s   172.25.173.22    k8s-5   <none>           <none>
rook-ceph-osd-2-6ddd8d9bb6-c2t72                  2/2     Running     0               7m35s   172.25.133.213   k8s-6   <none>           <none>
rook-ceph-osd-3-6f8dc5577c-glw5x                  2/2     Running     0               7m36s   172.25.38.89     k8s-4   <none>           <none>
rook-ceph-osd-4-6b578f8d-6x75s                    2/2     Running     0               7m35s   172.25.173.21    k8s-5   <none>           <none>
rook-ceph-osd-5-7d8b74f77b-5xzds                  2/2     Running     0               7m35s   172.25.133.212   k8s-6   <none>           <none>
rook-ceph-osd-prepare-k8s-4-rltxh                 0/1     Completed   0               8m1s    172.25.38.87     k8s-4   <none>           <none>
rook-ceph-osd-prepare-k8s-5-rvlrv                 0/1     Completed   0               8m1s    172.25.173.20    k8s-5   <none>           <none>
rook-ceph-osd-prepare-k8s-6-z9n47                 0/1     Completed   0               8m      172.25.133.211   k8s-6   <none>           <none>

# 等待osd pod运行后，存储节点的磁盘已经完成配置，FSTYPE已经有标识ceph_bluestore  
root@k8s-4:~# lsblk -f       
NAME   FSTYPE         LABEL    UUID                                 FSAVAIL FSUSE% MOUNTPOINT
vda                                                                                
├─vda1                                                                             
└─vda2 ext4                    2ec0411c-1071-4316-bed7-6f0afdf54814   21.9G    39% /
vdb    ceph_bluestore                                                              
vdc    ceph_bluestore    

# 其他节点pod运行正常
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get pod -n rook-ceph -o wide | grep k8s-[1-3]
csi-cephfsplugin-kl7zn                            3/3     Running     0               12m     192.168.1.59     k8s-3   <none>           <none>
csi-cephfsplugin-v6w7j                            3/3     Running     0               12m     192.168.1.56     k8s-2   <none>           <none>
csi-cephfsplugin-zvgld                            3/3     Running     0               12m     192.168.1.55     k8s-1   <none>           <none>
csi-rbdplugin-mpv46                               3/3     Running     0               12m     192.168.1.55     k8s-1   <none>           <none>
csi-rbdplugin-t7drc                               3/3     Running     0               12m     192.168.1.56     k8s-2   <none>           <none>
csi-rbdplugin-tzd48                               3/3     Running     0               12m     192.168.1.59     k8s-3   <none>           <none>

5. 创建 Rook toolbox

通过 Rook 提供的 toolbox实现对 Ceph 集群的管理。toolbax中提供了管理ceph集群的ceph客户端命令，可以查看ceph集群状态、osd拓扑信息等。

# 创建toolbox pod
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f toolbox.yaml 
deployment.apps/rook-ceph-tools created

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph get pod | grep tools
rook-ceph-tools-f5cd9fc5b-2lm7t                   1/1     Running     0              3m41s

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph exec -it deploy/rook-ceph-tools -- bash

# 查看ceph集群状态
bash-5.1$ ceph -s
  cluster:
    id:     6e960b5f-ad26-408a-bd48-f4d522d6757b
    health: HEALTH_WARN
            clock skew detected on mon.c, mon.b
 
  services:
    mon: 3 daemons, quorum a,c,b (age 104m)
    mgr: a(active, since 103m), standbys: b
    osd: 6 osds: 6 up (since 101m), 6 in (since 103m)
 
  data:
    pools:   1 pools, 1 pgs
    objects: 2 objects, 449 KiB
    usage:   160 MiB used, 120 GiB / 120 GiB avail
    pgs:     1 active+clean

# 查看osd拓扑
bash-5.1$ ceph osd tree
ID  CLASS  WEIGHT   TYPE NAME       STATUS  REWEIGHT  PRI-AFF
-1         0.11691  root default                             
-5         0.03897      host k8s-4                           
 0    hdd  0.01949          osd.0       up   1.00000  1.00000
 3    hdd  0.01949          osd.3       up   1.00000  1.00000
-3         0.03897      host k8s-5                           
 1    hdd  0.01949          osd.1       up   1.00000  1.00000
 4    hdd  0.01949          osd.4       up   1.00000  1.00000
-7         0.03897      host k8s-6                           
 2    hdd  0.01949          osd.2       up   1.00000  1.00000
 5    hdd  0.01949          osd.5       up   1.00000  1.00000

6. 使用存储

Rock Ceph 提供了三种存储类型，请参考官方指南了解详情：

• Block Storage(RBD): 给pod提供块存储使用（RWO）。
• Filesystem Storage(CephFS): 给多个pod共享的文件系统（RWX）。
• Object Storage(RGW): 提供块存储服务，可以在Kubernetes集群内或者外部访问。

Rook 允许通过自定义资源定义 (crd) 创建和自定义存储池。支持 Replicated （副本）和 Erasure Coded（纠删码） 类型。

6.1 创建并使用块存储池

创建块存储池

可以参考官方的资源清单示例文件：

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# grep -v  "^\s*#\|^\s*$" pool.yaml 
apiVersion: ceph.rook.io/v1
kind: CephBlockPool
metadata:
  name: replicapool
  namespace: rook-ceph # namespace:cluster
spec:
  failureDomain: host
  replicated:
    size: 3
    requireSafeReplicaSize: true
  parameters:
    compression_mode: none
  mirroring:
    enabled: false
    mode: image
  statusCheck:
    mirror:
      disabled: false
      interval: 60s

这里创建一个 3 副本的 Ceph 块存储池，编辑 CephBlockPool CR 资源清单，vi ceph-block-replicapool.yaml

apiVersion: ceph.rook.io/v1
kind: CephBlockPool
metadata:
  name: replicapool
  namespace: rook-ceph
spec:
  failureDomain: host
  replicated:
    size: 3

创建 CephBlockPool 资源:

kubectl create -f ceph-block-replicapool.yaml

查看存储池资源：

kubectl get cephBlockPool -n rook-ceph -o wide

创建storageclass

编辑 StorageClass 资源清单，vi storageclass-rook-ceph-block.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: rook-ceph-block
provisioner: rook-ceph.rbd.csi.ceph.com # csi-provisioner-name
parameters:
  clusterID: rook-ceph # namespace:cluster
  pool: replicapool
  imageFormat: "2"
  imageFeatures: layering
  csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/provisioner-secret-namespace: rook-ceph # namespace:cluster
  csi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/controller-expand-secret-namespace: rook-ceph # namespace:cluster
  csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
  csi.storage.k8s.io/node-stage-secret-namespace: rook-ceph # namespace:cluster
  csi.storage.k8s.io/fstype: ext4
allowVolumeExpansion: true
reclaimPolicy: Delete

创建并查看存储类资源：

root@k8s-1:~/rook-ceph/storage-pool# kubectl create -f storageclass-rook-ceph-block.yaml
root@k8s-1:~/rook-ceph/storage-pool# kubectl get sc
NAME                PROVISIONER                 RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
rook-ceph-block     rook-ceph.rbd.csi.ceph.com  Delete          Immediate           true                   7m12s

该部分资源清单件位于如下路径：rook-1.15.2/deploy/examples/csi/rbd，可以直接使用。

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# ll
total 60
drwxrwxr-x 2 root root 4096 Sep 29 09:41 ./
drwxrwxr-x 5 root root 4096 Sep 20 04:21 ../
-rw-rw-r-- 1 root root  489 Sep 20 04:21 pod-ephemeral.yaml
-rw-rw-r-- 1 root root  315 Sep 20 04:21 pod.yaml
-rw-rw-r-- 1 root root  266 Sep 20 04:21 pvc-clone.yaml
-rw-rw-r-- 1 root root  308 Sep 20 04:21 pvc-restore.yaml
-rw-rw-r-- 1 root root  196 Sep 20 04:21 pvc.yaml
-rw-rw-r-- 1 root root  362 Sep 20 04:21 raw-block-pod.yaml
-rw-rw-r-- 1 root root  226 Sep 20 04:21 raw-block-pvc.yaml
-rw-rw-r-- 1 root root  578 Sep 20 04:21 snapshotclass.yaml
-rw-rw-r-- 1 root root  205 Sep 20 04:21 snapshot.yaml
-rw-rw-r-- 1 root root 3984 Sep 20 04:21 storageclass-ec.yaml
-rw-rw-r-- 1 root root 2441 Sep 20 04:21 storageclass-test.yaml
-rw-rw-r-- 1 root root 4278 Sep 20 04:21 storageclass.yaml

创建测试应用使用块存储资源

使用 Rook 官方提供的测试pod挂载块存储资源测试。

# pvc资源清单
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# cat pvc.yaml 
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: rbd-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: rook-ceph-block

# 创建pvc资源
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# kubectl create -f pvc.yaml 
persistentvolumeclaim/rbd-pvc created
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# kubectl get pvc
NAME           STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
rbd-pvc        Bound    pvc-4fd6ca2f-1b19-453f-90d8-3dc428773d9a   1Gi        RWO            rook-ceph-block   69s

# 测试pod资源清单，这里使用nginx启动一个web服务器，并挂在pvc存储html文件
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# cat pod.yaml 
---
apiVersion: v1
kind: Pod
metadata:
  name: csirbd-demo-pod
spec:
  containers:
    - name: web-server
      image: nginx
      volumeMounts:
        - name: mypvc
          mountPath: /var/lib/www/html
  volumes:
    - name: mypvc
      persistentVolumeClaim:
        claimName: rbd-pvc
        readOnly: false
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# kubectl create -f pod.yaml 
pod/csirbd-demo-pod created

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# kubectl get pod -o wide
NAME              READY   STATUS    RESTARTS   AGE   IP             NODE    NOMINATED NODE   READINESS GATES
csirbd-demo-pod   1/1     Running   0          61s   172.25.13.81   k8s-3   <none>           <none>

查看pod内挂载的rbd存储：

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/rbd# kubectl exec -it csirbd-demo-pod -- df -Th
Filesystem     Type     Size  Used Avail Use% Mounted on
overlay        overlay   40G   16G   22G  42% /
tmpfs          tmpfs     64M     0   64M   0% /dev
tmpfs          tmpfs    3.9G     0  3.9G   0% /sys/fs/cgroup
shm            tmpfs     64M     0   64M   0% /dev/shm
/dev/vda2      ext4      40G   16G   22G  42% /etc/hosts
/dev/rbd0      ext4     974M   24K  958M   1% /var/lib/www/html
tmpfs          tmpfs    7.7G   12K  7.7G   1% /run/secrets/kubernetes.io/serviceaccount
tmpfs          tmpfs    3.9G     0  3.9G   0% /proc/acpi
tmpfs          tmpfs    3.9G     0  3.9G   0% /proc/scsi
tmpfs          tmpfs    3.9G     0  3.9G   0% /sys/firmware

6.2 创建并使用文件存储池

相关资源清单文件位于如下路径：

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# ls -alh filesystem*
-rw-rw-r-- 1 root root 4.5K Sep 20 04:21 filesystem-ec.yaml
-rw-rw-r-- 1 root root 1.2K Sep 20 04:21 filesystem-mirror.yaml
-rw-rw-r-- 1 root root 1.8K Sep 20 04:21 filesystem-test.yaml
-rw-rw-r-- 1 root root 6.9K Sep 20 04:21 filesystem.yaml
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cd csi/
cephfs/ nfs/    rbd/  

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cd csi/cephfs/
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# ll
total 56
drwxrwxr-x 2 root root 4096 Sep 29 10:38 ./
drwxrwxr-x 5 root root 4096 Sep 20 04:21 ../
-rw-rw-r-- 1 root root  616 Sep 20 04:21 groupsnapshotclass.yaml
-rw-rw-r-- 1 root root  360 Sep 20 04:21 groupsnapshot.yaml
-rw-rw-r-- 1 root root 1681 Sep 20 04:21 kube-registry.yaml
-rw-rw-r-- 1 root root  488 Sep 20 04:21 pod-ephemeral.yaml
-rw-rw-r-- 1 root root  321 Sep 20 04:21 pod.yaml
-rw-rw-r-- 1 root root  268 Sep 20 04:21 pvc-clone.yaml
-rw-rw-r-- 1 root root  310 Sep 20 04:21 pvc-restore.yaml
-rw-rw-r-- 1 root root  230 Sep 20 04:21 pvc.yaml
-rw-rw-r-- 1 root root  587 Sep 20 04:21 snapshotclass.yaml
-rw-rw-r-- 1 root root  214 Sep 20 04:21 snapshot.yaml
-rw-rw-r-- 1 root root 1751 Sep 20 04:21 storageclass-ec.yaml
-rw-rw-r-- 1 root root  770 Sep 29 10:38 storageclass.yaml

创建文件存储池

这次使用纠删码创建存储池：

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cp filesystem-ec.yaml filesystem-ec.yaml.bak
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# vim filesystem-ec.yaml
# 修改节点亲和性部分，取消注释，修改key-values。修改时注意语法格式，对应部分字段对其，严格缩进。否则创建资源会报错。
    placement:
      nodeAffinity:
        requiredDuringSchedulingIgnoredDuringExecution:
          nodeSelectorTerms:
          - matchExpressions:
            - key: mds
              operator: In
              values:
              - mds-node
      topologySpreadConstraints:
      tolerations:
      - key: mds-node
        operator: Exists

# 生成不带注释行的yaml文件
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# grep -v  "^\s*#\|^\s*$" filesystem-ec.yaml > myfs.yaml

# 节点设置label用于mds pod调度
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-6 mds=mds-sever
node/k8s-6 labeled
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-5 mds=mds-sever
node/k8s-5 labeled
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-4 mds=mds-sever
node/k8s-4 labeled

# 创建文件系统实例
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f myfs.yaml 
cephfilesystem.ceph.rook.io/myfs-ec created
cephfilesystemsubvolumegroup.ceph.rook.io/myfs-csi created

# 查看mds
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get pod -n rook-ceph -o wide | grep mds
rook-ceph-mds-myfs-ec-a-85589777d5-7kdvp  2/2 Running   0  11s   172.25.173.36    k8s-5   <none>           <none>
rook-ceph-mds-myfs-ec-b-54c56f4459-v9vtx  2/2 Running   0  10s   172.25.133.236   k8s-6   <none>           <none>

# 创建文件系统后会自动创建相关存储池
root@k8s-1:~/rook-ceph/storage-pool# kubectl exec -itn rook-ceph rook-ceph-tools-f5cd9fc5b-2lm7t  
bash-5.1$ ceph osd pool ls
.mgr
replicapool
myfs-ec-metadata
myfs-ec-data0
myfs-ec-erasurecoded

# k8s资源对象
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get CephFilesystem -n rook-ceph
NAME       ACTIVEMDS   AGE   PHASE
myfs-ec   1           52m   Ready

创建storageclass

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# grep -v  "^\s*#\|^\s*$" storageclass-ec.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: rook-cephfs
provisioner: rook-ceph.cephfs.csi.ceph.com # csi-provisioner-name
parameters:
  clusterID: rook-ceph # namespace:cluster
  fsName: myfs-ec	# 文件系统实例
  pool: myfs-ec-erasurecoded	# 存储池
  csi.storage.k8s.io/provisioner-secret-name: rook-csi-cephfs-provisioner
  csi.storage.k8s.io/provisioner-secret-namespace: rook-ceph # namespace:cluster
  csi.storage.k8s.io/controller-expand-secret-name: rook-csi-cephfs-provisioner
  csi.storage.k8s.io/controller-expand-secret-namespace: rook-ceph # namespace:cluster
  csi.storage.k8s.io/node-stage-secret-name: rook-csi-cephfs-node
  csi.storage.k8s.io/node-stage-secret-namespace: rook-ceph # namespace:cluster
reclaimPolicy: Delete
allowVolumeExpansion: true
mountOptions:

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# kubectl create -f storageclass-ec.yaml 
storageclass.storage.k8s.io/rook-cephfs created
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# kubectl get sc
NAME                PROVISIONER           RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
rook-ceph-block     rook-ceph.rbd.csi.ceph.com       Delete          Immediate           true                   3h23m
rook-cephfs         rook-ceph.cephfs.csi.ceph.com    Delete          Immediate           true                   3s

创建测试应用并使用文件存储资源

使用 Rook 官方提供的测试pod挂载块存储资源测试。

# 创建pvc和pod
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# kubectl create -f pvc.yaml 
persistentvolumeclaim/cephfs-pvc created
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# kubectl create -f pod.yaml 
pod/csicephfs-demo-pod created

# 查看pod内挂载信息
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples/csi/cephfs# kubectl exec -it csicephfs-demo-pod -- df -Th
Filesystem            Type     Size  Used Avail Use% Mounted on
/dev/vda2             ext4      40G   19G   19G  52% /etc/hosts
10.103.253.118:6789,10.101.12.34:6789,10.106.31.157:6789:/volumes/csi/csi-vol-6af1ea76-8b27-4ec3-b844-724d39dee8bd/78776168-fc0b-440a-8ee8-5a87f831dc21 ceph     1.0G     0  1.0G   0% /var/lib/www/html                                                                                   

6.3 创建并使用对象存储池

创建对象存储和对象网关

# 对象存储相关示例清单文件
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# ls -alh object*.yaml
-rw-rw-r-- 1 root root 3.3K Sep 20 04:21 object-a.yaml
-rw-rw-r-- 1 root root  169 Sep 20 04:21 object-bucket-claim-a.yaml
-rw-rw-r-- 1 root root  587 Sep 20 04:21 object-bucket-claim-delete.yaml
-rw-rw-r-- 1 root root  489 Sep 20 04:21 object-bucket-claim-notification.yaml
-rw-rw-r-- 1 root root  587 Sep 20 04:21 object-bucket-claim-retain.yaml
-rw-rw-r-- 1 root root 3.3K Sep 20 04:21 object-b.yaml
-rw-rw-r-- 1 root root 3.6K Sep 20 04:21 object-ec.yaml
-rw-rw-r-- 1 root root  777 Sep 20 04:21 object-external.yaml
-rw-rw-r-- 1 root root 1.9K Sep 20 04:21 object-multisite-pull-realm-test.yaml
-rw-rw-r-- 1 root root 2.0K Sep 20 04:21 object-multisite-pull-realm.yaml
-rw-rw-r-- 1 root root 1.5K Sep 20 04:21 object-multisite-test.yaml
-rw-rw-r-- 1 root root 1.6K Sep 20 04:21 object-multisite.yaml
-rw-rw-r-- 1 root root 6.5K Sep 20 04:21 object-openshift.yaml
-rw-rw-r-- 1 root root 1.5K Sep 20 04:21 object-shared-pools-test.yaml
-rw-rw-r-- 1 root root 1.5K Sep 20 04:21 object-shared-pools.yaml
-rw-rw-r-- 1 root root  685 Sep 20 04:21 object-test.yaml
-rw-rw-r-- 1 root root 1.1K Sep 20 04:21 object-user.yaml
-rw-rw-r-- 1 root root 6.6K Sep 29 13:32 object.yaml

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cp object.yaml object.yaml.bak
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# vim object.yaml
# 修改节点亲和性部分，取消注释，修改key-values。修改时注意语法格式，对应部分字段对其，严格缩进。否则创建资源会报错。
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: rgw
            operator: In
            values:
            - rgw-node
    topologySpreadConstraints:
    tolerations:
    - key: rgw-node
      operator: Exists
    podAffinity:
    podAntiAffinity:

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# grep -v  "^\s*#\|^\s*$" object.yaml > myobject.yaml

# 节点设置label用于rgw pod调度
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-6 rgw=rgw-node
node/k8s-6 labeled
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-5 rgw=rgw-node
node/k8s-5 labeled
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl label node k8s-4 rgw=rgw-node
node/k8s-4 labeled

# 创建对象存储池和对象网关
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f myobject.yaml 

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph -o wide get pod -l app=rook-ceph-rgw
NAME           READY   STATUS    RESTARTS   AGE   IP   NODE    NOMINATED NODE   READINESS GATES
rook-ceph-rgw-my-store-a-767c8f8dd9-2zpvl   2/2     Running   0    21m   172.25.173.40   k8s-5   <none>     <none>

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph get svc | grep rgw
rook-ceph-rgw-my-store                   ClusterIP   10.103.162.53    <none>        80/TCP              3m8s

# 相关存储池
root@k8s-1:~/rook-ceph/storage-pool# kubectl exec -itn rook-ceph rook-ceph-tools-f5cd9fc5b-2lm7t  
bash-5.1$ ceph osd pool ls
...
.rgw.root
my-store.rgw.buckets.non-ec
my-store.rgw.otp
my-store.rgw.buckets.index
my-store.rgw.meta
my-store.rgw.log
my-store.rgw.control
my-store.rgw.buckets.data

# k8s资源对象
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get CephObjectStore -n rook-ceph
NAME       PHASE   ENDPOINT                                         SECUREENDPOINT   AGE
my-store   Ready   http://rook-ceph-rgw-my-store.rook-ceph.svc:80                    14m

创建storageclass

# 相关资源清单
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# ls -alh | grep bucket-
-rw-rw-r-- 1 root root  659 Sep 20 04:21 bucket-notification-endpoint.yaml
-rw-rw-r-- 1 root root 1.2K Sep 20 04:21 bucket-notification.yaml
-rw-rw-r-- 1 root root  847 Sep 20 04:21 bucket-topic.yaml
-rw-rw-r-- 1 root root  169 Sep 20 04:21 object-bucket-claim-a.yaml
-rw-rw-r-- 1 root root  587 Sep 20 04:21 object-bucket-claim-delete.yaml
-rw-rw-r-- 1 root root  489 Sep 20 04:21 object-bucket-claim-notification.yaml
-rw-rw-r-- 1 root root  587 Sep 20 04:21 object-bucket-claim-retain.yaml
-rw-rw-r-- 1 root root  271 Sep 20 04:21 storageclass-bucket-a.yaml
-rw-rw-r-- 1 root root  708 Sep 20 04:21 storageclass-bucket-delete.yaml
-rw-rw-r-- 1 root root  715 Sep 20 04:21 storageclass-bucket-retain.yaml

# 基于上面创建的CephObjectStore创建存储类
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cat storageclass-bucket-retain.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: rook-ceph-retain-bucket
provisioner: rook-ceph.ceph.rook.io/bucket # driver:namespace:cluster
# set the reclaim policy to retain the bucket when its OBC is deleted
reclaimPolicy: Retain
parameters:
   objectStoreName: my-store # port 80 assumed
   objectStoreNamespace: rook-ceph # namespace:cluster
   # To accommodate brownfield cases reference the existing bucket name here instead
   # of in the ObjectBucketClaim (OBC). In this case the provisioner will grant
   # access to the bucket by creating a new user, attaching it to the bucket, and
   # providing the credentials via a Secret in the namespace of the requesting OBC.
   #bucketName:
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f storageclass-bucket-retain.yaml 
storageclass.storage.k8s.io/rook-ceph-retain-bucket created

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get sc
NAME                      PROVISIONER                                          RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
rook-ceph-block           rook-ceph.rbd.csi.ceph.com                           Delete          Immediate           true                   4h11m
rook-ceph-retain-bucket   rook-ceph.ceph.rook.io/bucket                        Retain          Immediate           false                  16s
rook-cephfs               rook-ceph.cephfs.csi.ceph.com                        Delete          Immediate           true                   41m

创建桶并使用s3cmd测试

根据上面创建的rook-ceph-retain-bucket 存储类，创建对象存储桶声明Object Bucket Claim（OBC）来请求一个存储桶。

# 查看obc定义
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cat object-bucket-claim-retain.yaml 
apiVersion: objectbucket.io/v1alpha1
kind: ObjectBucketClaim
metadata:
  name: ceph-retain-bucket
spec:
  # To create a new bucket specify either `bucketName` or
  # `generateBucketName` here. Both cannot be used. To access
  # an existing bucket the bucket name needs to be defined in
  # the StorageClass referenced here, and both `bucketName` and
  # `generateBucketName` must be omitted in the OBC.
  #bucketName:
  generateBucketName: ceph-bkt
  storageClassName: rook-ceph-retain-bucket
  additionalConfig:
    # To set for quota for OBC
    #maxObjects: "1000"
    #maxSize: "2G"

# 创建obc，同时创建obc后会创建对象桶。
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f object-bucket-claim-retain.yaml 
objectbucketclaim.objectbucket.io/ceph-retain-bucket created
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get obc
NAME                 AGE
ceph-retain-bucket   2m55s

# 相同namespace下会创建一个secret和ConfigMap。secret包含用于访问存储桶的凭据；cm包含存储桶端点信息。
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get cm 
NAME                 DATA   AGE
ceph-retain-bucket   5      2m
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get secret
NAME                 TYPE     DATA   AGE
ceph-retain-bucket   Opaque   2      4m20s

注意

示例文件中的delete、retain表示pv的回收策略，在创建资源时，注意根据命名找对应关系。

使用s3cmd测试对象桶：

# 查看桶的url和ak，sk
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get secret ceph-retain-bucket -oyaml
apiVersion: v1
data:
  AWS_ACCESS_KEY_ID: N0w2TkszTFVLVEgwTTBWUjE0ODU=
  AWS_SECRET_ACCESS_KEY: OW5OZExxUVo5eGZua1VubGtCTjUzbWwwVENsMFdBc3c4YklnRG52VQ==
kind: Secret
metadata:
...

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get cm ceph-retain-bucket -oyaml
apiVersion: v1
data:
  BUCKET_HOST: rook-ceph-rgw-my-store.rook-ceph.svc
  BUCKET_NAME: ceph-bkt-4f101ee2-eafa-4c99-8608-03162e0878fa
  BUCKET_PORT: "80"
  BUCKET_REGION: ""
  BUCKET_SUBREGION: ""
kind: ConfigMap
...

# 创建s3cmd配置文件
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# export AWS_ACCESS_KEY_ID=$(kubectl -n default get secret ceph-retain-bucket -o jsonpath='{.data.AWS_ACCESS_KEY_ID}' | base64 --decode)
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# export AWS_SECRET_ACCESS_KEY=$(kubectl -n default get secret ceph-retain-bucket -o jsonpath='{.data.AWS_SECRET_ACCESS_KEY}' | base64 --decode)
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# echo $AWS_ACCESS_KEY_ID
7L6NK3LUKTH0M0VR1485
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# echo $AWS_SECRET_ACCESS_KEY
9nNdLqQZ9xfnkUnlkBN53ml0TCl0WAsw8bIgDnvU

# 创建s3cmd配置文件
cat > ~/.s3cfg << EOF
[default]
access_key = 7L6NK3LUKTH0M0VR1485
host_base = rook-ceph-rgw-my-store.rook-ceph.svc
secret_key = 9nNdLqQZ9xfnkUnlkBN53ml0TCl0WAsw8bIgDnvU
use_https = False
EOF

# 将配置文件创建为cm
root@k8s-1:~/rook-ceph# kubectl create configmap s3cmd-config --from-file=/root/.s3cfg
configmap/s3cmd-config created

# 创建s3cmd，测试连接对象桶
root@k8s-1:~/rook-ceph# kubectl create -f s3cmd-pod.yaml 
pod/s3cmd-pod created
root@k8s-1:~/rook-ceph# kubectl exec -it s3cmd-pod -- sh
/ # cat /root/.s3cfg 
[default]
access_key = 7L6NK3LUKTH0M0VR1485
host_base = rook-ceph-rgw-my-store.rook-ceph.svc
secret_key = 9nNdLqQZ9xfnkUnlkBN53ml0TCl0WAsw8bIgDnvU
use_https = False
/ # s3cmd ls
2024-09-29 06:06  s3://ceph-bkt-4f101ee2-eafa-4c99-8608-03162e0878fa

其中s3cmd-pod资源清单文件如下：

root@k8s-1:~/rook-ceph# cat s3cmd-pod.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: s3cmd-pod
spec:
  containers:
  - name: s3cmd-container
    image: harbor.rd.unicloud.com/s3cmd/s3cmd:latest  # 使用包含s3cmd的镜像
    command: [ "sleep", "99999" ]  # 保持Pod长时间运行，可以进入调试
    volumeMounts:
    - name: s3config
      mountPath: /root/  # 将配置文件挂载到s3cmd的默认配置路径
  volumes:
  - name: s3config
    configMap:
      name: s3cmd-config
      items:
      - key: .s3cfg
        path: .s3cfg

说明

s3cmd提供二进制方式的运行，参考s3cmd/INSTALL.md at master · s3tools/s3cmd (github.com)或者我之前的文章，安装后可以也可以直接在节点运行连接对象桶。

7. Ceph Dashboard

类似于Kubernetes的Dashboard，Ceph也 提供了一个 Dashboard 工具，用于在web界面管理查看ceph集群信息，包括集群整体运行状态、Mgr、Mon、OSD 和其他 Ceph 进程的状态，查看存储池和 PG 状态，以及显示守护进程的日志等。

7.1 查看ceph-mgr-dashboard信息

部署集群的配置文件 cluster.yaml ，默认已经开启了 Dashboard 功能，Rook Ceph operator 部署集群时将启用 ceph-mgr 的 Dashboard 模块。

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get svc -n rook-ceph
NAME                      TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)             AGE
rook-ceph-exporter        ClusterIP   10.108.171.16    <none>        9926/TCP            12h
rook-ceph-mgr             ClusterIP   10.107.248.122   <none>        9283/TCP            12h
rook-ceph-mgr-dashboard   ClusterIP   10.101.97.136    <none>        8443/TCP            12h
rook-ceph-mon-a           ClusterIP   10.101.12.34     <none>        6789/TCP,3300/TCP   12h
rook-ceph-mon-b           ClusterIP   10.106.31.157    <none>        6789/TCP,3300/TCP   12h
rook-ceph-mon-c           ClusterIP   10.103.253.118   <none>        6789/TCP,3300/TCP   12h

7.2 配置在集群外部访问dashborad

在 K8s 集群外部访问 Ceph Dashboard，可以通过 NodePort 或是 Ingress 的方式。

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# cat dashboard-external-https.yaml
apiVersion: v1
kind: Service
metadata:
  name: rook-ceph-mgr-dashboard-external-https
  namespace: rook-ceph # namespace:cluster
  labels:
    app: rook-ceph-mgr
    rook_cluster: rook-ceph # namespace:cluster
spec:
  ports:
    - name: dashboard
      port: 8443
      protocol: TCP
      targetPort: 8443
  selector:
    app: rook-ceph-mgr
    mgr_role: active
    rook_cluster: rook-ceph # namespace:cluster
  sessionAffinity: None
  type: NodePort

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl create -f dashboard-external-https.yaml 
service/rook-ceph-mgr-dashboard-external-https created
root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl get svc -n rook-ceph rook-ceph-mgr-dashboard-external-https
NAME                                     TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
rook-ceph-mgr-dashboard-external-https   NodePort   10.105.83.54   <none>        8443:30669/TCP   46s

7.3 获取登录凭证

登陆 Dashboard 时需要身份验证，Rook 创建了一个默认用户，用户名 admin。创建了一个名为 rook-ceph-dashboard-password 的 secret 存储密码，使用下面的命令获取随机生成的密码。

root@k8s-1:~/rook-ceph/rook-1.15.2/deploy/examples# kubectl -n rook-ceph get secret rook-ceph-dashboard-password -o jsonpath="{['data']['password']}" | base64 --decode && echo
GY2saqAx$(9\qh|W$>)K

7.4 登录Dashboard

通过k8s任意节点的 IP+nodeport访问，本文中url为https://192.168.1.55:30669，默认用户名 admin，密码通过上面的命令获取。

ceph文件系统：

ceph对象网关：

说明

登录dashboard后可以在用户管理界面修改admin密码。

8. 相关资料

1. rook/rook: Storage Orchestration for Kubernetes (github.com)
2. Rook - Rook Ceph Documentation
3. Kubernetes 持久化存储之 Rook Ceph 探究 (kubesphere.io)
4. 在 Kubernetes 中使用 Rook 构建云原生存储环境 (kubesphere.io)