【ceph】Centos 7.1 安装Ceph

一、环境介绍

环境：三台Centos 7.1的主机

二、安装前准备（所有主机）

2.1 关闭防火墙和selinux

关闭 SELINUX
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
setenforce 0

关闭防火墙
systemctl stop firewalld.service 

systemctl disable firewalld.service 

2.2 修改hosts文件

vi /etc/hosts
192.168.209.100 admin
192.168.209.100 node1
192.168.209.101 node2
192.168.209.102 node3
测试：
[root@localhost /]# ping node1
PING node1 (192.168.209.100) 56(84) bytes of data.
64 bytes from admin (192.168.209.100): icmp_seq=1 ttl=64 time=0.096 ms
^C
--- node1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.096/0.096/0.096/0.000 ms
[root@localhost /]# ping node2
PING node2 (192.168.209.101) 56(84) bytes of data.
64 bytes from node2 (192.168.209.101): icmp_seq=1 ttl=64 time=0.317 ms
^C
--- node2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.317/0.317/0.317/0.000 ms
[root@localhost /]# ping node3
PING node3 (192.168.209.102) 56(84) bytes of data.
64 bytes from node3 (192.168.209.102): icmp_seq=1 ttl=64 time=0.323 ms
^C
--- node3 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.323/0.323/0.323/0.000 ms
[root@localhost /]# 

2.3 修改时区并安装NTP

修改时区
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

安装NTP
yum -y install ntp
systemctl enable ntpd
systemctl start ntpd
ntpstat

2.4 安装epel仓库(重要，不安装可能后面安装ceph会失败)

rpm -Uvh https://dl.fedoraproject.org/pub/epel/7Server/x86_64/Packages/e/epel-release-7-11.noarch.rpm
这个包在写这个博文的时候是可用的，过段时间可能会失效，如果失效了请大家按照这个路径去找，release的包，不一定是7-11的，不过没关系，安装了这个包之后，后面的安装一般没有问题。

2.5 添加ceph的yum源

添加之前请先确认mirrors.163.com/ceph/rpm-hammer/el7/x86_64/是否存在，如果不存在，那么需要修改一下网址
vi ceph.repo
[ceph]
name=Ceph noarch packages
baseurl=http://mirrors.163.com/ceph/rpm-hammer/el7/x86_64/
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.163.com/ceph/keys/release.asc

三、安装ceph

3.1 安装ceph（admin）

yum -y update && yum -y install --release hammer ceph ceph-deploy

3.2 安装ceph（其余node）

yum -y update && yum -y install --release hammer ceph 

3.3 允许无密码 SSH 登录(admin)

生成密钥对（一路回车即可）
ssh-keygen 

将公钥拷贝到其余节点
ssh-copy-id root@node1
ssh-copy-id root@node2
ssh-copy-id root@node3

测试，ssh到各个节点，看是否需要输入密码

四、安装完成

验证安装效果
命令行输入ceph按Tab键不齐，如果出现其余命令，则说明已经安装完成啦！
[root@localhost /]# ceph
ceph                   ceph-dencoder          ceph-mon
ceph-authtool          ceph-deploy            ceph-objectstore-tool
ceph-brag              ceph-disk              ceph-osd
ceph-client-debug      ceph-disk-activate     ceph-post-file
ceph-clsinfo           ceph-disk-prepare      ceph-rbdnamer
ceph-conf              ceph-disk-udev         ceph-rest-api
ceph-coverage          cephfs                 ceph-run
ceph-create-keys       cephfs-journal-tool    ceph-syn
ceph-crush-location    cephfs-table-tool      
ceph-debugpack         ceph-mds               
[root@localhost /]# ceph