Ceph Openshift
Ceph分布式块存储部署机器列表
| 名称 | 核数 | 内存 | ip | hostname | 外挂磁盘大小（G） |
|---|---|---|---|---|---|
| 管理节点admin | 2 | 4 | 192.168.1.2 | admin.ceph.com | |
| 监控节点monitor | 2 | 4 | 192.168.1.3 | monitor.ceph.com | |
| 存储节点node1 | 2 | 4 | 192.168.1.4 | node1.ceph.com | 100G |
| 存储节点node2 | 2 | 4 | 192.168.1.5 | node2.ceph.com | 100G |
部署Ceph RBD
1、给每台机器设置hostname
# 设置hostname hostnamectl --static set-hostname admin.ceph.com #192.168.1.2 hostnamectl --static set-hostname monitor.ceph.com #192.168.1.3 hostnamectl --static set-hostname node1.ceph.com #192.168.1.4 hostnamectl --static set-hostname node2.ceph.com #192.168.1.5
2、给每个服务器创建用户ceph
# 添加用户ceph ansible -i hosts all -m user -a "name=ceph"# 登录每台机器使用passwd命令给每个用户创建密码ceph# 创建ceph用户密码 [root@admin ~]# passwd cephChanging password for user ceph.New password: ceph BAD PASSWORD: The password is shorter than 8 characters Retype new password: ceph passwd: all authentication tokens updated successfully.# 为每台服务器上的ceph用户添加root权限(用root用户登录)# 为用户添加root权限 ansible -i hosts all -m shell -a 'echo "ceph ALL=(root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/ceph'ansible -i hosts all -m shell -a 'chmod 0440 /etc/sudoers.d/ceph'
为admin节点设置访问其它服务器免密码登录
[ceph@admin ~]$ ssh-keygen Generating public/private rsa key pair.Enter file in which to save the key (/home/ceph/.ssh/id_rsa): Created directory '/home/ceph/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/ceph/.ssh/id_rsa. Your public key has been saved in /home/ceph/.ssh/id_rsa.pub. The key fingerprint is: SHA256:rH/HNUPm4HPtxOXzbndOwGzpy6bwA1frhW9S5cywl2Q ceph@admin.ceph.com The key's randomart image is: +---[RSA 2048]----+ | | | | | | | . .o=Eo| | S . *O%+| | . . +oX+%| | . .+ =.X+| | . .o+.+oO| | .. .o+o*=| +----[SHA256]-----+ [ceph@admin ~]$ ssh-copy-id ceph@monitor.ceph.com [ceph@admin ~]$ ssh-copy-id ceph@node1.ceph.com [ceph@admin ~]$ ssh-copy-id ceph@node2.ceph.com
创建集群
# admin.ceph.com创建my-cluster文件夹 $ ssh ceph@admin $ mkdir my-cluster $ cd my-cluster# 安装ceph-deploy# 安装ceph-deploy yum install ceph-deploy# 清除之前的配置数据# 清除之前的数据 ceph-deploy uninstall admin.ceph.com monitor.ceph.com node1.ceph.com node2.ceph.com# 清除远程主机/var/lib/ceph /etc/ceph中的包和数据# 清除远程主机/var/lib/ceph /etc/ceph中的包和数据 ceph-deploy purge admin.ceph.com monitor.ceph.com node1.ceph.com node2.ceph.com# 清除/var/lib/ceph及/etc/ceph下ceph目录及以下内容全部# 清除/var/lib/ceph及/etc/ceph下ceph目录及以下内容全部： ceph-deploy purgedata admin.ceph.com monitor.ceph.com node1.ceph.com node2.ceph.com# 清除my-cluster目录中的认证密钥文件# 清除my-cluster目录中的认证密钥文件 ceph-deploy forgetkeys# 关闭所有节点的防火墙及安全防护项（青云平台机器默认是不开启的，这步可以不用做）# 关闭所有节点的防火墙及安全防护项 ansible -i ceph-hosts all -m service -a 'name=iptables state=stopped'ansible -i ceph-hosts all -m shell -a 'setenforce 0'# 创建集群 $ ceph-deploy new monitor.ceph.com# 在~/my-cluster下会生成三个文件# ~/my-cluster下会生成三个文件 $ ll total 24-rw-rw-r-- 1 ceph ceph 251 Jan 12 16:34 ceph.conf -rw-rw-r-- 1 ceph ceph 15886 Jan 12 16:30 ceph.log -rw------- 1 ceph ceph 73 Jan 12 16:30 ceph.mon.keyring# 系统默认的osd pool为3，目前osd为2，需要修改默认值# 修改osd默认值为2 [ceph@admin my-cluster]$ cat ceph.conf [global] fsid = 25c13add-967e-4912-bb33-ebbc2cb9376d mon_initial_members = monitor mon_host = 192.168.1.3auth_cluster_required = cephx auth_service_required = cephx auth_client_required = cephx filestore_xattr_use_omap = trueosd pool default size=2# 部署安装ceph ceph-deploy install admin.ceph.com monitor.ceph.com node1.ceph.com node2.ceph.com# 创建Ceph Monitor $ ceph-deploy mon create monitor.ceph.com $ ceph-deploy gatherkeys monitor.ceph.com# 创建ceph osd# 切到node1.ceph.com给node1数据节点挂载磁盘/dev/sdc# 挂载磁盘 $ sudo mkfs.xfs -f /dev/sdc $ mkdir /var/lib/ceph/osd/osd-0$ sudo mount /dev/sdc /var/lib/ceph/osd/osd-0$ sudo chown ceph:ceph /var/lib/ceph/osd/osd-0# 同样的方法把node2.ceph.com的磁盘挂载到/var/lib/ceph/osd/osd-1# 挂载磁盘 $ sudo mkfs.xfs -f /dev/sdc $ mkdir /var/lib/ceph/osd/osd-1$ sudo mount /dev/sdc /var/lib/ceph/osd/osd-1$ sudo chown ceph:ceph /var/lib/ceph/osd/osd-1# 准备并激活osd，返回到admin管理节点# 准备并激活ceph osd $ ceph-deploy osd prepare node1.ceph.com:/var/lib/ceph/osd/osd-0 node2.ceph.com:/var/lib/ceph/osd/osd-1$ ceph-deploy osd activate node1.ceph.com:/var/lib/ceph/osd/osd-0 node2.ceph.com:/var/lib/ceph/osd/osd-1# 拷贝配置文件及key文件$ ceph-deploy admin admin.ceph.com monitor.ceph.com node1.ceph.com node2.ceph.com# 为ceph.clinet.admin.keyring添加可读权限（admin节点与monitor节点都添加）# 添加读取权限 $ sudo chmod +r /etc/ceph/ceph.client.admin.keyring# 查看集群状态$ ceph health $ ceph osd tree #查看当前节点# 完成！！！
Openshift上创建RBD Storageclass
首先查看my-cluster文件夹下的ceph.client.admin.keyring文件
$ cat ceph.client.admin.keyring [client.admin] key = AQBUilha86ufLhAA2BxJn7sG8qVYndokVwtvyA== caps mds = "allow *" caps mon = "allow *" caps osd = "allow *"# 使用admin的key在openshift上创建secret
创建secret私钥
oc create secret generic ceph-secret --type="kubernetes.io/rbd" --from-literal=key='AQBUilha86ufLhAA2BxJn7sG8qVYndokVwtvyA==' --namespace=kube-system
在需要使用ceph-rbd的project也需要添加secret
oc create secret generic ceph-secret --type="kubernetes.io/rbd" --from-literal=key='AQBUilha86ufLhAA2BxJn7sG8qVYndokVwtvyA==' --namespace=project
创建storageclass
# storageclass.yamlapiVersion: storage.k8s.io/v1 kind: StorageClass metadata: name: ceph-rbd-sc provisioner: kubernetes.io/rbd parameters: monitors: 192.168.1.3:6789 adminId: admin adminSecretName: ceph-secret adminSecretNamespace: kube-system pool: rbd userId: admin userSecretName: ceph-secret# oc create -f storageclass.yaml
说明:adminId默认值为admin,pool默认值为rbd, userId默认值与adminId一样.所以这三个值可以不填写。
创建PVC(可通过yaml创建也可以在openshift的webconsole中选择对应的storageclass创建)
# ceph-rbd-pvc.yaml kind: PersistentVolumeClaim apiVersion: v1 metadata: name: myclaim spec: accessModes: - ReadWriteOnce resources: requests: storage: 8Gi storageClassName: ceph-rbd-sc# oc create -f ceph-rbd-pvc.yaml -n project
结果展示
Ceph存储PVC.png
作者：潘晓华Michael
链接：https://www.jianshu.com/p/d7f6df33ca39
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