ceph集群搭建

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Ceph 集群文档

集群架构：
image.png

环境：
10.200.51.4 admin、osd、mon 作为管理和监控节点
10.200.51.9 osd、mds
10.200.51.10 osd、mds
10.200.51.113~client 节点

ceph1 作为管理，osd.mon 节点。前三台新增硬盘

[root@ceph1 ~]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb               isize=512    agcount=4, agsize=1310720 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=5242880, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@ceph1 ~]# mkdir /var/local/osd{0,1,2}
[root@ceph1 ~]# mount /dev/sdb /var/local/osd0/

[root@ceph2 ~]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb               isize=512    agcount=4, agsize=1310720 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=5242880, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@ceph2 ~]# mkdir /var/local/osd{0,1,2}
[root@ceph2 ~]# mount /dev/sdb /var/local/osd1/

[root@ceph3 ~]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb               isize=512    agcount=4, agsize=1310720 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=5242880, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@ceph3 ~]# mkdir /var/local/osd{0,1,2}
[root@ceph3 ~]# mount /dev/sdb /var/local/osd2/
  • 编辑 host 文件（各节点操作）
10.200.51.4 ceph1
10.200.51.9 ceph2
10.200.51.10 ceph3
10.200.51.113 ceph4

echo -e "192.168.51.206 ceph1\n192.168.51.207 ceph2\n192.168.51.208 ceph3\n192.168.51.209 ceph4\n192.168.51.212 controller\n192.168.51.211 cinder\n192.168.51.210 computer" >> /etc/hosts
  • SSH 免密码登陆（各节点操作）
ssh-keygen
ssh-copy-id ceph1
ssh-copy-id ceph2
ssh-copy-id ceph3
ssh-copy-id ceph4
  • 同步时间
    在 ceph1 上安装 ntp 服务，是 2、3 同步 1 的时间
[root@ceph1 ~]# yum install ntp -y
[root@ceph1 ~]# systemctl start ntpd
[root@ceph2 ~]# ntpdate 10.200.51.4
[root@ceph3 ~]# ntpdate 10.200.51.4

或者所有节点配置统一互联网 ntp 服务

ntpdate ntp1.aliyun.com

管理节点安装

添加 yum 源，参考阿里镜像源
官方源

[ceph]
name=ceph
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/x86_64/ 
gpgcheck=0
priority=1

[ceph-noarch] 
name=ceph noarch
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/noarch/ 
gpgcheck=0
priority=1

[ceph-source]
name=Ceph source packages 
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/SRPMS 
gpgcheck=0
priority=1

yum clean all
yum makecache
  • 更新软件源安装 ceph-deploy
yum -y install ceph-deploy
  • 创建 monitor 服务
mkdir /etc/ceph && cd /etc/ceph
ceph-deploy new ceph1 
[root@ceph1 ceph]# ls
ceph.conf  ceph-deploy-ceph.log  ceph.mon.keyring

Ceph 配置文件、一个 monitor 密钥环和一个日志文件
修改副本数
#配置文件的默认副本数从 3 改成 2，这样只有两个 osd 也能达到 active+clean 状态，把下面这行加入到[global]段（可选配置），参考这里

[root@ceph1 ceph]# vim ceph.conf
[global]
fsid = 94b37984-4bf3-44f4-ac08-3bb1a638c771
mon_initial_members = ceph1
mon_host = 10.200.51.4
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
osd_pool_default_size = 2
  • 安装 ceph（所有节点安装）
[root@ceph1 ceph]# ceph-deploy install ceph1 ceph2 ceph3 ceph4

完成后：

[root@ceph1 ceph]#  ceph --version
ceph version 10.2.11 (e4b061b47f07f583c92a050d9e84b1813a35671e)

[root@ceph1 ceph]# ceph-deploy mon create ceph1

[root@ceph1 ceph]# ceph --cluster=ceph --admin-daemon /var/run/ceph/ceph-mon.ceph1.asok mon_status
{
    "name": "ceph1",
    "rank": 0,
    "state": "leader",
    "election_epoch": 3,
    "quorum": [
        0
    ],
    "outside_quorum": [],
    "extra_probe_peers": [],
    "sync_provider": [],
    "monmap": {
        "epoch": 1,
        "fsid": "0fe8ad12-6f71-4a94-80cc-2d19a9217b4b",
        "modified": "2019-10-31 01:50:50.330750",
        "created": "2019-10-31 01:50:50.330750",
        "mons": [
            {
                "rank": 0,
                "name": "ceph1",
                "addr": "10.200.51.4:6789\/0"
            }
        ]
    }
}

[root@ceph1 ceph]# ceph-deploy gatherkeys ceph1

部署 osd 服务

添加 osd 节点
之前创建的目录/var/local/osd{id}

  • 准备 OSD
[root@ceph1 ceph]# ceph-deploy osd prepare ceph1:/var/local/osd0 ceph2:/var/local/osd1 ceph3:/var/local/osd2
  • 激活 OSD：
    首先给足权限（在各个节点上给/var/local/osd0/、/var/local/osd1/和/var/local/osd2/添加权限）：
chmod 777 -R /var/local/osd0/
chmod 777 -R /var/local/osd1/
chmod 777 -R /var/local/osd2/

[root@ceph1 ceph]# ceph-deploy osd activate ceph1:/var/local/osd0 ceph2:/var/local/osd1    ceph3:/var/local/osd2 ceph4:/var/local/osd3
  • 查看状态：
[root@ceph1 ceph]#  ceph-deploy osd list ceph1 ceph2 ceph3
[ceph_deploy.conf][DEBUG ] found configuration file at: /root/.cephdeploy.conf
[ceph_deploy.cli][INFO  ] Invoked (1.5.39): /usr/bin/ceph-deploy osd list ceph1 ceph2 ceph3
[ceph_deploy.cli][INFO  ] ceph-deploy options:
[ceph_deploy.cli][INFO  ]  username                      : None
[ceph_deploy.cli][INFO  ]  verbose                       : False
[ceph_deploy.cli][INFO  ]  overwrite_conf                : False
[ceph_deploy.cli][INFO  ]  subcommand                    : list
[ceph_deploy.cli][INFO  ]  quiet                         : False
[ceph_deploy.cli][INFO  ]  cd_conf                       : <ceph_deploy.conf.cephdeploy.Conf instance at 0x7f0d07370290>
[ceph_deploy.cli][INFO  ]  cluster                       : ceph
[ceph_deploy.cli][INFO  ]  func                          : <function osd at 0x7f0d073be050>
[ceph_deploy.cli][INFO  ]  ceph_conf                     : None
[ceph_deploy.cli][INFO  ]  default_release               : False
[ceph_deploy.cli][INFO  ]  disk                          : [('ceph1', None, None), ('ceph2', None, None), ('ceph3', None, None)]
[ceph1][DEBUG ] connected to host: ceph1 
[ceph1][DEBUG ] detect platform information from remote host
[ceph1][DEBUG ] detect machine type
[ceph1][DEBUG ] find the location of an executable
[ceph1][DEBUG ] find the location of an executable
[ceph1][INFO  ] Running command: /bin/ceph --cluster=ceph osd tree --format=json
[ceph1][DEBUG ] connected to host: ceph1 
[ceph1][DEBUG ] detect platform information from remote host
[ceph1][DEBUG ] detect machine type
[ceph1][DEBUG ] find the location of an executable
[ceph1][INFO  ] Running command: /usr/sbin/ceph-disk list
[ceph1][INFO  ] ----------------------------------------
[ceph1][INFO  ] ceph-0
[ceph1][INFO  ] ----------------------------------------
[ceph1][INFO  ] Path           /var/lib/ceph/osd/ceph-0
[ceph1][INFO  ] ID             0
[ceph1][INFO  ] Name           osd.0
[ceph1][INFO  ] Status         up
[ceph1][INFO  ] Reweight       1.0
[ceph1][INFO  ] Active         ok
[ceph1][INFO  ] Magic          ceph osd volume v026
[ceph1][INFO  ] Whoami         0
[ceph1][INFO  ] Journal path   /var/local/osd0/journal
[ceph1][INFO  ] ----------------------------------------
[ceph2][DEBUG ] connected to host: ceph2 
[ceph2][DEBUG ] detect platform information from remote host
[ceph2][DEBUG ] detect machine type
[ceph2][DEBUG ] find the location of an executable
[ceph2][INFO  ] Running command: /usr/sbin/ceph-disk list
[ceph2][INFO  ] ----------------------------------------
[ceph2][INFO  ] ceph-1
[ceph2][INFO  ] ----------------------------------------
[ceph2][INFO  ] Path           /var/lib/ceph/osd/ceph-1
[ceph2][INFO  ] ID             1
[ceph2][INFO  ] Name           osd.1
[ceph2][INFO  ] Status         up
[ceph2][INFO  ] Reweight       1.0
[ceph2][INFO  ] Active         ok
[ceph2][INFO  ] Magic          ceph osd volume v026
[ceph2][INFO  ] Whoami         1
[ceph2][INFO  ] Journal path   /var/local/osd1/journal
[ceph2][INFO  ] ----------------------------------------
[ceph3][DEBUG ] connected to host: ceph3 
[ceph3][DEBUG ] detect platform information from remote host
[ceph3][DEBUG ] detect machine type
[ceph3][DEBUG ] find the location of an executable
[ceph3][INFO  ] Running command: /usr/sbin/ceph-disk list
[ceph3][INFO  ] ----------------------------------------
[ceph3][INFO  ] ceph-2
[ceph3][INFO  ] ----------------------------------------
[ceph3][INFO  ] Path           /var/lib/ceph/osd/ceph-2
[ceph3][INFO  ] ID             2
[ceph3][INFO  ] Name           osd.2
[ceph3][INFO  ] Status         up
[ceph3][INFO  ] Reweight       1.0
[ceph3][INFO  ] Active         ok
[ceph3][INFO  ] Magic          ceph osd volume v026
[ceph3][INFO  ] Whoami         2
[ceph3][INFO  ] Journal path   /var/local/osd2/journal
[ceph3][INFO  ] ----------------------------------------
  • 统一配置
    （用 ceph-deploy 把配置文件和 admin 密钥拷贝到所有节点，这样每次执行 Ceph 命令行时就无需 指定 monitor 地址和 ceph.client.admin.keyring 了）
[root@ceph1 ceph]# ceph-deploy admin ceph1 ceph2 ceph3
[ceph_deploy.conf][DEBUG ] found configuration file at: /root/.cephdeploy.conf
[ceph_deploy.cli][INFO  ] Invoked (1.5.39): /usr/bin/ceph-deploy admin ceph1 ceph2 ceph3
[ceph_deploy.cli][INFO  ] ceph-deploy options:
[ceph_deploy.cli][INFO  ]  username                      : None
[ceph_deploy.cli][INFO  ]  verbose                       : False
[ceph_deploy.cli][INFO  ]  overwrite_conf                : False
[ceph_deploy.cli][INFO  ]  quiet                         : False
[ceph_deploy.cli][INFO  ]  cd_conf                       : <ceph_deploy.conf.cephdeploy.Conf instance at 0x7feff2220cb0>
[ceph_deploy.cli][INFO  ]  cluster                       : ceph
[ceph_deploy.cli][INFO  ]  client                        : ['ceph1', 'ceph2', 'ceph3']
[ceph_deploy.cli][INFO  ]  func                          : <function admin at 0x7feff2f39a28>
[ceph_deploy.cli][INFO  ]  ceph_conf                     : None
[ceph_deploy.cli][INFO  ]  default_release               : False
[ceph_deploy.admin][DEBUG ] Pushing admin keys and conf to ceph1
[ceph1][DEBUG ] connected to host: ceph1 
[ceph1][DEBUG ] detect platform information from remote host
[ceph1][DEBUG ] detect machine type
[ceph1][DEBUG ] write cluster configuration to /etc/ceph/{cluster}.conf
[ceph_deploy.admin][DEBUG ] Pushing admin keys and conf to ceph2
[ceph2][DEBUG ] connected to host: ceph2 
[ceph2][DEBUG ] detect platform information from remote host
[ceph2][DEBUG ] detect machine type
[ceph2][DEBUG ] write cluster configuration to /etc/ceph/{cluster}.conf
[ceph_deploy.admin][DEBUG ] Pushing admin keys and conf to ceph3
[ceph3][DEBUG ] connected to host: ceph3 
[ceph3][DEBUG ] detect platform information from remote host
[ceph3][DEBUG ] detect machine type
[ceph3][DEBUG ] write cluster configuration to /etc/ceph/{cluster}.conf

各节点修改 ceph.client.admin.keyring 权限：

chmod +r /etc/ceph/ceph.client.admin.keyring
  • 查看 OSD 状态：
[root@ceph1 ceph]# ceph health
HEALTH_OK

部署 MDS 服务

[root@ceph1 ceph]# ceph-deploy mds create ceph2 ceph3

查看集群状态：

[root@ceph1 ceph]# ceph mds stat  
e4:, 3 up:standby
[root@ceph1 ceph]# ceph -s
    cluster 0fe8ad12-6f71-4a94-80cc-2d19a9217b4b
     health HEALTH_OK
     monmap e1: 1 mons at {ceph1=10.200.51.4:6789/0}
            election epoch 3, quorum 0 ceph1
     osdmap e15: 3 osds: 3 up, 3 in
            flags sortbitwise,require_jewel_osds
      pgmap v25: 64 pgs, 1 pools, 0 bytes data, 0 objects
            15681 MB used, 45728 MB / 61410 MB avail
                  64 active+clean

创建存储系统

首先查看：

[root@ceph1 ceph]# ceph fs ls 
No filesystems enabled
  • 创建存储池
[root@ceph1 ceph]# ceph osd pool create cephfs_data 128 
pool 'cephfs_data' created
[root@ceph1 ceph]# ceph osd pool create cephfs_metadata 128 
pool 'cephfs_metadata' created
  • 创建文件系统
    创建好存储池后，就可以用 fs new 命令创建文件系统了
[root@ceph1 ceph]#  ceph fs new 128 cephfs_metadata cephfs_data
new fs with metadata pool 2 and data pool 1
[root@ceph1 ceph]# ceph fs ls
name: 128, metadata pool: cephfs_metadata, data pools: [cephfs_data ]

文件系统创建完毕后， MDS 服务器就能达到 active 状态了，比如在一个单 MDS 系统中：

[root@ceph1 ceph]#  ceph mds stat
e7: 1/1/1 up {0=ceph3=up:active}, 2 up:standby

active 是活跃的，另 1 个是处于热备份的状态

挂载 ceph 文件系统

不同的挂载方式

用内核驱动挂载 CEPH 文件系统

client 端配置：
#创建挂载点 存储密钥（如果没有在管理节点使用 ceph-deploy 拷贝 ceph 配置文件）

[root@ceph3 ~]#  cat /etc/ceph/ceph.client.admin.keyring 
[client.admin]
        key = AQA6drpdei+IORAA7Ogqh9Wn0NbdGI/juTXnqw==

将如上 key 对应的值保存到客户端（/etc/ceph/admin.secret）

[root@ceph4 ceph]# cat /etc/ceph/admin.secret 
AQA6drpdei+IORAA7Ogqh9Wn0NbdGI/juTXnqw==

要挂载启用了 cephx 认证的 Ceph 文件系统，你必须指定用户名、密钥。

[root@ceph4 ~]# mount -t ceph 10.200.51.4:6789:/ /opt/ -o name=admin,secretfile=/etc/ceph/admin.secret

查看挂载情况：

[root@ceph4 ~]# df -h 
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 475M     0  475M   0% /dev
tmpfs                    487M     0  487M   0% /dev/shm
tmpfs                    487M  7.6M  479M   2% /run
tmpfs                    487M     0  487M   0% /sys/fs/cgroup
/dev/mapper/centos-root   27G  1.6G   26G   6% /
/dev/sda1               1014M  136M  879M  14% /boot
tmpfs                     98M     0   98M   0% /run/user/0
10.200.51.4:6789:/        60G   16G   45G  26% /opt

取消挂载

[root@ceph4 ~]# umount /opt/
[root@ceph4 ~]# df -h       
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 475M     0  475M   0% /dev
tmpfs                    487M     0  487M   0% /dev/shm
tmpfs                    487M  7.6M  479M   2% /run
tmpfs                    487M     0  487M   0% /sys/fs/cgroup
/dev/mapper/centos-root   27G  1.6G   26G   6% /
/dev/sda1               1014M  136M  879M  14% /boot
tmpfs                     98M     0   98M   0% /run/user/0

用户空间挂载 CEPH 文件系统

标题：ceph集群搭建
作者：cuijianzhe
地址：https://cjzshilong.cn/articles/2019/10/30/1572426357896.html

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