Ceph添加新节点

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　　     开始我打算更新“部署mimic版本的Ceph分布式存储系统”，但是发觉不好布局，所以新续写了这篇文章。如下配置、部署依然是在ceph01节点完成，部署的新节点为ceph04。

　　

　　1.配置ansible
# cat /etc/ansible/hosts | grep -v ^# | grep -v ^$
[node]
192.168.100.117
192.168.100.118
[new-node]
192.168.100.119　　2.配置hosts
# cat /etc/hosts
192.168.100.116  ceph01
192.168.100.117  ceph02
192.168.100.118  ceph03
192.168.100.119  ceph04　　

　　3.复制密钥
# ssh-copy-id -i .ssh/id_rsa.pub root@ceph04　　4.使用ansible配置节点
# vim ceph.yaml
- hosts: new-node
  remote_user: root
  tasks:
   - name: 关闭Selinux
     lineinfile:
               path: /etc/selinux/config
               regexp: '^SELINUX='
               line: 'SELINUX=disabled'
   - name: 关闭Firewall
     service:
            name: firewalld
            state: stopped
            enabled: no
- hosts: new-node
  remote_user: root
  tasks:
   - name: 复制hosts
     copy: src=/etc/hosts dest=/etc/hosts   
   - name: 复制EPEL源
     copy: src=/etc/yum.repos.d/epel.repo dest=/etc/yum.repos.d/epel.repo
   - rpm_key:
            state: present
            key: https://mirrors.aliyun.com/ceph/keys/release.asc
   - name: 复制ceph源
     copy: src=/etc/yum.repos.d/ceph.repo dest=/etc/yum.repos.d/ceph.repo
   - name: 删除缓存数据
     command: yum clean all
     args:
         warn: no
   - name: 创建元数据缓存
     command: yum makecache
     args:
         warn: no
- hosts: new-node
  remote_user: root
  tasks:
   - name: 安装包
     yum:
        name: "{{ packages }}"
     vars:
        packages:
         - yum-plugin-priorities
         - snappy
         - leveldb
         - gdisk
         - python-argparse
         - gperftools-libs
         - ntp
         - ntpdate
         - ntp-doc   
   - name: 启动ntpdate
     service:
            name: ntpdate
            state: started
            enabled: yes
   - name: 启动ntpd
     service:
            name: ntpd
            state: started
            enabled: yes
# ansible-playbook ceph.yaml　　

　　5.使用ansible-deploy为节点安装ceph
# cd /etc/ceph/
# ceph-deploy install --release mimic ceph04　　6.将监视器添加到现有群集
# ceph-deploy mon add ceph04 --address 192.168.100.119
# cat ceph.conf
[global]
fsid = 09f5d004-5759-4b54-8c4b-e3ebb0b416b2
public_network = 192.168.100.0/24
cluster_network = 192.168.100.0/24
mon_initial_members = ceph01, ceph02, ceph03，ceph04
mon_host = 192.168.100.116,192.168.100.117,192.168.100.118,192.168.100.119
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
# ceph mon stat
e2: 4 mons at {ceph01=192.168.100.116:6789/0,ceph02=192.168.100.117:6789/0,ceph03=192.168.100.118:6789/0,ceph04=192.168.100.119:6789/0}, election epoch 60, leader 0 ceph01, quorum 0,1,2,3 ceph01,ceph02,ceph03,ceph04　　

　　7.将管理密钥拷贝到该节点
# ceph-deploy admin ceph04　　

　　8.创建 ceph 管理进程服务
# ceph-deploy mgr create ceph04
# ceph -s|grep mgr
    mgr: ceph01(active), standbys: ceph03, ceph02, ceph04　　9.创建OSD
# ceph-deploy osd create --data /dev/sdb ceph04
# ceph osd stat
4 osds: 4 up, 4 in; epoch: e53
# ceph -s
  cluster:
    id:     09f5d004-5759-4b54-8c4b-e3ebb0b416b2
    health: HEALTH_OK
  services:
    mon: 4 daemons, quorum ceph01,ceph02,ceph03,ceph04
    mgr: ceph01(active), standbys: ceph03, ceph02, ceph04
    osd: 4 osds: 4 up, 4 in
  data:
    pools:   1 pools, 128 pgs
    objects: 64  objects, 136 MiB
    usage:   4.3 GiB used, 76 GiB / 80 GiB avail
    pgs:     128 active+clean　　注:如果就是想加一个磁盘(或者说OSD)的话，只需该步骤即可。