Centos搭建ceph+++五、创建ceph集群
五、创建ceph集群
在node-admin节点上
1.node-admin管理节点上创建一个目录，用于保存 ceph-deploy 生成的配置文件和密钥对
切换到ceph用户
su - ceph创建my-cluster文件夹
mkdir my-cluster进入文件夹中（下面命令都在这里面执行）
cd my-cluster
[ceph@admin-node ~]$ cd my-cluster/
[ceph@admin-node my-cluster]$
2.清理旧配置
2.1：删除节点上的所有的ceph数据：
ceph-deploy purgedata node1 node2 node3如果报如下错误：
[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.25): /bin/ceph-deploy purgedata node1 node2 node3
[ceph_deploy.install][DEBUG ] Purging data from cluster ceph hosts node1 node2 node3
[node1][DEBUG ] connection detected need for sudo
sudo: sorry, you must have a tty to run sudo
[node1][DEBUG ] connected to host: node1
[ceph_deploy][ERROR ] RuntimeError: remote connection got closed, ensure ``requiretty`` is disabled for node1注释掉Defaults requiretty
修改node1，node2，node3中/etc/sudoers文件
注释掉其中的Defaults requiretty
vi /etc/sudoers
#Defaults requiretty2.2：执行ceph-deploy forgetkeys
[ceph@admin-node my-cluster]$ ceph-deploy forgetkeys
[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.25): /bin/ceph-deploy forgetkeys
提示：用下列命令可以连 Ceph 安装包一起清除
ceph-deploy purge node1 node2 node3(我们只是清理配置，不用清理包， 不需要执行，除非你出了什么大错误， 执行之后需要重新安装ceph了)
3.创建集群
ceph-deploy new node1
[ceph@admin-node my-cluster]$ ceph-deploy forgetkeys
[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.25): /bin/ceph-deploy forgetkeys
[ceph@admin-node my-cluster]$ ceph-deploy new node1
[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.25): /bin/ceph-deploy new node1
[ceph_deploy.new][DEBUG ] Creating new cluster named ceph
[ceph_deploy.new][INFO ] making sure passwordless SSH succeeds
[node1][DEBUG ] connected to host: admin-node
[node1][INFO ] Running command: ssh -CT -o BatchMode=yes node1
[node1][DEBUG ] connection detected need for sudo
[node1][DEBUG ] connected to host: node1
[node1][DEBUG ] detect platform information from remote host
[node1][DEBUG ] detect machine type
[node1][DEBUG ] find the location of an executable
[node1][INFO ] Running command: sudo /usr/sbin/ip link show
[node1][INFO ] Running command: sudo /usr/sbin/ip addr show
[node1][DEBUG ] IP addresses found: ['192.168.200.41', '10.0.0.41', '192.168.100.41']
[ceph_deploy.new][DEBUG ] Resolving host node1
[ceph_deploy.new][DEBUG ] Monitor node1 at 10.0.0.41
[ceph_deploy.new][DEBUG ] Monitor initial members are ['node1']
[ceph_deploy.new][DEBUG ] Monitor addrs are ['10.0.0.41']
[ceph_deploy.new][DEBUG ] Creating a random mon key...
[ceph_deploy.new][DEBUG ] Writing monitor keyring to ceph.mon.keyring...
[ceph_deploy.new][DEBUG ] Writing initial config to ceph.conf...我们不需要执行ceph-deploy install admin-node node1 node2 node3这条安装命令
在前面我们已经在node1，node2，node3上单独安装了ceph
可以单独执行一下,看看有没有差什么包，最后都会报错因为我们已经安装好了ceph包
ceph-deploy install node1
ceph-deploy install node2
ceph-deploy install node3报错如下
[node3][DEBUG ] Complete!
[node3][WARNIN] ensuring that /etc/yum.repos.d/ceph.repo contains a high priority
[ceph_deploy][ERROR ] RuntimeError: NoSectionError: No section: 'ceph'
最后说了一句完成的，木有问题