3.2. Preflight

# http://docs.ceph.com/docs/master/start/quick-start-preflight/#

这里的配置注意点如下：

ceph-admin 节点：

安装时， with a stable Ceph release (e.g., luminous.) ，安装 luminous 或以上版本。

cephu@cephadmin:~/my-cluster$ sudo cat /etc/apt/sources.list.d/ceph.list
deb https://download.ceph.com/debian-luminous/ xenial main
cephu@cephadmin:~/my-cluster$

配置 ~/.ssh/config 方便后续安装

cephu@cephadmin:~/my-cluster$ cat ~/.ssh/config
Host node0
    Hostname cephadmin
    User cephu
Host node1
    Hostname mon1
    User cephu
Host node2
    Hostname cephfsn2
    User cephu
Host node3
    Hostname cephfsn3
    User cephu
cephu@cephadmin:~/my-cluster$

这里，我后来想了一下，应该把这个地方，修改成 全用 node0, node1, node2, node3, 然后，各节点的　Hostname 也修改成这些，这样子才是真的方便安装。如下：

cephu@cephadmin:~/my-cluster$ cat ~/.ssh/config
Host node0
    Hostname node0
    User cephu
Host node1
    Hostname node1
    User cephu
Host node2
    Hostname node2
    User cephu
Host node3
    Hostname node3
    User cephu
cephu@cephadmin:~/my-cluster$

存储节点：

cephu@cephadmin:~/my-cluster$ cat /etc/hosts
127.0.0.1       localhost
127.0.1.1       ubuntu
#127.0.0.1      cephfs5

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

192.168.31.115 cephadmin
192.168.31.114 mon1
192.168.31.113 cephfsn2
192.168.31.173 cephfsn3