1.搭建Ceph集群
1）准备工作
| 机器编号 | 主机名 | IP |
| 1 | ceph1 | 192.168.1.121 |
| 2 | ceph2 | 192.168.1.123 |
| 3 | ceph3 | 192.168.1.125 |
关闭selinux、firewalld，配置hostname以及/etc/hosts
为每一台机器都准备至少一块单独的磁盘
所有机器安装时间同步服务chrony
[root@ceph1 ~]# mv /etc/yum.repos.d/* /home
[root@ceph1 ~]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@ceph1 ~]# yum clean all&& yum repolist&& yum install -y chrony
[root@ceph1 ~]# systemctl start chronyd
[root@ceph1 ~]# systemctl enable chronyd
所有机器安装docker-ce
[root@ceph1 ~]# yum install -y dnf
[root@ceph1 ~]# sudo dnf -y install dnf-plugins-core
[root@ceph1 ~]# sudo dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
添加仓库自：https://download.docker.com/linux/centos/docker-ce.repo
[root@ceph1 ~]# sed -i 's+https://download.docker.com+https://mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo
[root@ceph1 ~]# sudo dnf install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
[root@ceph1 ~]# sudo systemctl enable --now docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{"registry-mirrors": ["https://docker.1ms.run","https://doublezonline.cloud"]
}
EOF
sudo systemctl daemon-reload && sudo systemctl restart docker所有机器安装python3、lvm2（三台都做）
[root@ceph1 ~]# yum install -y python3 lvm2
[root@ceph1 ~]# cat>>/etc/yum.repos.d/ceph.repo<<EOF
> [ceph]
> name=ceph
> baseurl=http://mirrors.aliyun.com/ceph/rpm-pacific/el8/x86_64/
> gpgcheck=0
> priority =1
> [ceph-noarch]
> name=cephnoarch
> baseurl=http://mirrors.aliyun.com/ceph/rpm-pacific/el8/noarch/
> gpgcheck=0
> priority =1
> [ceph-source]
> name=Ceph source packages
> baseurl=http://mirrors.aliyun.com/ceph/rpm-pacific/el8/SRPMS
> gpgcheck=0
> priority=1
> EOF
[root@ceph1 ~]# yum clean all&& yum repolist&& yum install -y cephadm
[root@ceph1 ~]# cephadm bootstrap --mon-ip 192.168.1.121
Ceph Dashboard is now available at:URL: https://ceph1:8443/User: adminPassword: 8dfpxjf9cz新密码 wang1021访问dashboard
增加host
生成ssh密钥对儿
[ceph: root@ceph1 /]# ceph cephadm get-pub-key > ~/ceph.pub
配置到另外两台机器免密登录
[ceph: root@ceph1 /]# ssh-copy-id -f -i ~/ceph.pub root@ceph2
[ceph: root@ceph1 /]# ssh-copy-id -f -i ~/ceph.pub root@ceph3
到浏览器里，增加主机
假设三台机器上新增的新磁盘为/dev/sdb
[ceph: root@ceph1 /]# ceph orch daemon add osd ceph1:/dev/sdb
[ceph: root@ceph1 /]# ceph orch daemon add osd ceph2:/dev/sdb&& ceph orch daemon add osd ceph3:/dev/sdb
查看磁盘列表：
[ceph: root@ceph1 /]# ceph orch device ls
HOST PATH TYPE DEVICE ID SIZE AVAILABLE REFRESHED REJECT REASONS
ceph1 /dev/sdb hdd 100G 38s ago Has a FileSystem, Insufficient space (<10 extents) on vgs, LVM detected
ceph1 /dev/sr0 hdd VMware_Virtual_SATA_CDRW_Drive_00000000000000000001 4494M 38s ago Has a FileSystem, Insufficient space (<5GB)
ceph2 /dev/sdb hdd 100G 41s ago Has a FileSystem, Insufficient space (<10 extents) on vgs, LVM detected
ceph2 /dev/sr0 hdd VMware_Virtual_SATA_CDRW_Drive_00000000000000000001 4494M 41s ago Has a FileSystem, Insufficient space (<5GB)
ceph3 /dev/sdb hdd 100G 40s ago Has a FileSystem, Insufficient space (<10 extents) on vgs, LVM detected
ceph3 /dev/sr0 hdd VMware_Virtual_SATA_CDRW_Drive_00000000000000000001 4494M 40s ago Has a FileSystem, Insufficient space (<5GB) 此时dashboard上也可以看到
创建pool
查看集群状态
[ceph: root@ceph1 /]# ceph -scluster:id: 0731be72-c206-11ef-82cf-000c29044707health: HEALTH_OKservices:mon: 3 daemons, quorum ceph1,ceph2,ceph3 (age 2m)mgr: ceph1.eyxwak(active, since 10m), standbys: ceph2.hxchaeosd: 3 osds: 3 up (since 2m), 3 in (since 3m)data:pools: 1 pools, 1 pgsobjects: 0 objects, 0 Busage: 871 MiB used, 299 GiB / 300 GiB availpgs: 1 active+clean针对aming-1 pool启用rbd application
[ceph: root@ceph1 /]# ceph osd pool application enable test rdb
enabled application 'rdb' on pool 'test'
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