一、ceph的正常卸载与非正常卸载
一、正常卸载（通过ceph-deploy卸载）
环境已安装ceph-deploy
1、查看ceph-deploy的帮助信息
[cephde@controller03 cephcluster]$ ceph-deploy -h usage: ceph-deploy [-h] [-v | -q] [--version] [--username USERNAME] [--overwrite-conf] [--ceph-conf CEPH_CONF] COMMAND ... Easy Ceph deployment -^- / \ |O o| ceph-deploy v2.0.1 ).-.( '/|||\` | '|` | '|` Full documentation can be found at: http://ceph.com/ceph-deploy/docs optional arguments: -h, --help show this help message and exit -v, --verbose be more verbose -q, --quiet be less verbose --version the current installed version of ceph-deploy --username USERNAME the username to connect to the remote host --overwrite-conf overwrite an existing conf file on remote host (if present) --ceph-conf CEPH_CONF use (or reuse) a given ceph.conf file commands: COMMAND description new Start deploying a new cluster, and write a CLUSTER.conf and keyring for it. install Install Ceph packages on remote hosts. rgw Ceph RGW daemon management mgr Ceph MGR daemon management mds Ceph MDS daemon management mon Ceph MON Daemon management gatherkeys Gather authentication keys for provisioning new nodes. disk Manage disks on a remote host. osd Prepare a data disk on remote host. repo Repo definition management admin Push configuration and client.admin key to a remote host. config Copy ceph.conf to/from remote host(s) uninstall Remove Ceph packages from remote hosts. purgedata Purge (delete, destroy, discard, shred) any Ceph data from /var/lib/ceph purge Remove Ceph packages from remote hosts and purge all data. forgetkeys Remove authentication keys from the local directory. pkg Manage packages on remote hosts. calamari Install and configure Calamari nodes. Assumes that a repository with Calamari packages is already configured. Refer to the docs for examples (http://ceph.com/ceph-deploy/docs/conf.html) See 'ceph-deploy <command> --help' for help on a specific command
2、软件环境：集群——三个节点
1、卸载软件包
ceph-deploy purge controller01 ceph-deploy purge controller02 ceph-deploy purge controller03
2、删除各种配置文件和生成的数据文件
ceph-deploy purgedata controller01 ceph-deploy purgedata controller02 ceph-deploy purgedata controller03
3、将卸载节点的认证密钥从本地目录移除
ceph-deploy forgetkeys<br><br>#检查ceph-mon是否启动 ps -ef|grep ceph or ps -A|grep ceph<br><br>#启动ceph-mon ceph-mon --id=1
2、软件环境：单节点
ceph-deploy purge controller01 ceph-deploy purgedata controller01 ceph-deploy forgetkeys
二、非正常卸载
1、ceph安装失败，想从头再来，不用删除客户端。可以使用下面的命令将环境恢复到刚安装完客户端的状态。
ps aux|grep ceph |awk '{print $2}'|xargs kill -9 ps aux|grep ceph |awk '{print $2}'|xargs kill -9 ps -ef|grep ceph
确保此时所有ceph进程都已经关闭！！！如果没有关闭，多执行几次。
2、如果想彻底清除环境，而不是想重新安装。那么ceph软件包也要卸载
umount /var/lib/ceph/ osd /* rm -rf /var/lib/ceph/ osd /* rm -rf /var/lib/ceph/ mon /* rm -rf /var/lib/ceph/ mds /* rm -rf /var/lib/ceph/bootstrap- mds /* rm -rf /var/lib/ceph/bootstrap- osd /* rm -rf /var/lib/ceph/bootstrap- mon /* rm -rf /var/lib/ceph/ tmp /* rm -rf /etc/ceph/* rm -rf /var/run/ceph/*
3、查看安装哪些ceph相关的包
# rpm -qa|grep ceph ceph-base-12.2.8-0.el7.x86_64 centos-release-ceph-luminous-1.1-2.el7.centos.noarch ceph-mgr-12.2.8-0.el7.x86_64 ceph-mds-12.2.8-0.el7.x86_64 libcephfs2-12.2.8-0.el7.x86_64 ceph-12.2.8-0.el7.x86_64 ceph-common-12.2.8-0.el7.x86_64 ceph-mon-12.2.8-0.el7.x86_64 ceph-radosgw-12.2.8-0.el7.x86_64 ceph-deploy-2.0.1-0.noarch python-cephfs-12.2.8-0.el7.x86_64 ceph-osd-12.2.8-0.el7.x86_64 ceph-selinux-12.2.8-0.el7.x86_64
4、卸载
yum remove ceph
三、ceph 更换controller3 服务器，ceph需要处理的地方
1、删除ceph-mon
ceph mon remove mon3
2、移除osd
ceph osd rm osd.6 ceph osd rm osd.7 ceph osd rm osd.8 ceph osd crush rm osd.6 ceph osd crush rm osd.7 ceph osd crush rm osd.8 ceph auth del osd.6 ceph auth del osd.7 ceph auth del osd.8