CentOS7安装Ceph

CentOS 7  x64 安装 Ceph

二， 实验环境

节点            IP                 主机名                  系统

MON         172.24.0.13           ceph-mon0             CentOS 7 X64

MDS         172.24.0.13           ceph-mds0             CentOS 7 X64

OSD0        172.24.0.14           ceph-osd0             CentOS 7 X64  

OSD1        172.24.0.14           ceph-osd1             CentOS 7 X64

client      

三、安装步骤

1、首先建立机器SSH互信关系

生成密钥

ssh-keygen -t rsa -P &＃39;&＃39;

ssh-keygen -t rsa -f .ssh/id_rsa -P &＃39;&＃39;

向被授权的主机上拷贝

ssh-copy-id -i .ssh/id_rsa.pub root@主机

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ssh-copy-id -i .ssh/id_rsa.pub root@172.24.0.13 

ssh-copy-id -i .ssh/id_rsa.pub root@172.24.0.14

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配置所有主机时间同步

安装ntpdate

yum -y install ntpdate

开始同步时间

ntpdate time.windows.com 

修改每台机器的主机名 (hostname)  ( mon,mds,osd,client 都必须设置 )

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echo 172.24.0.13 ceph-mon0 >> /etc/hosts

echo 172.24.0.13 ceph-mds0 >> /etc/hosts

echo 172.24.0.14 ceph-osd0 >> /etc/hosts

echo 172.24.0.14 ceph-osd1 >> /etc/hosts

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yum更新，安装相关依赖包(适用于mon,mds,osd)     

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rpm --import &＃39;https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc&＃39;

rpm -Uvh http://mirrors.yun-idc.com/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

yum install snappy leveldb gdisk python-argparse gperftools-libs -y

rpm -Uvh http://ceph.com/rpm-dumpling/el7/noarch/ceph-release-1-0.el7.centos.noarch.rpm

yum install ceph-deploy -y

yum install ceph -y

yum install btrfs-progs           (适用于所有osd)

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配置/etc/ceph/ceph.conf，  (适用于mon,mds,osd)

vi /etc/ceph/ceph.conf

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[global]

public network = 172.24.0.0/24

pid file = /var/run/ceph/$name.pid

auth cluster required = none

auth service required = none

auth client required = none

keyring = /etc/ceph/keyring.$name

osd pool default size = 1

osd pool default min size = 1

osd pool default crush rule = 0

osd crush chooseleaf type = 1

[mon]

mon data = /var/lib/ceph/mon/$name

mon clock drift allowed = .15

keyring = /etc/ceph/keyring.$name

[mon.0]

host = ceph-mon0

mon addr = 172.24.0.13:6789

[mds]

keyring = /etc/ceph/keyring.$name

[mds.0]

host = ceph-mds0

[osd]

osd data = /mnt/osd$id

osd recovery max active = 5

osd mkfs type = xfs

osd journal = /mnt/osd$id/journal

osd journal size = 1000

keyring = /etc/ceph/keyring.$name

[osd.0]

host = ceph-osd0

devs = /dev/mapper/centos-osd0

[osd.1]

host = ceph-osd1

devs = /dev/mapper/centos-osd1

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创建目录 ( osd )

mkdir /mnt/osd0 

mkdir /mnt/osd1

启动ceph(在mon上执行)

初始化：

mkcephfs -a -c /etc/ceph/ceph.conf 

/etc/init.d/ceph -a start

( #遇到 Error ENOENT: osd.0 does not exist.  create it before updating the crush map ) 执行如下代码:

ceph osd create

然后在执行   /etc/init.d/ceph -a start       既可完成

执行健康检查

ceph health      #也可以使用ceph -s命令查看状态  (如果返回的是HEALTH_OK，则代表成功！)

挂载ceph  (172.24.0.15 为客户端)

mon推荐有至少3个，假如挂掉一个、服务也能正常使用

client0的CentOS7默认没有开启ceph_fs的内核，需要更改内核，这里直接用yum更新（可以手工编译）

使用elrepo提供的, 已经编译好的内核

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

yum install -y yum-plugin-fastestmirror

yum --enablerepo=elrepo-kernel install kernel-ml kernel-ml-devel

grub2-set-default 0

reboot 重启服务器

mkdir /opt/ceph 

1.  ceph-fuse -m 172.24.0.13:6789 /opt/ceph 

2.  mount -t ceph 172.24.0.13:6789/ /opt/ceph

#这里的密钥，是mon /etc/ceph/ keyring.client.admin 中的内容。

多个 mon 可使用,号分开 如：ceph-fuse -m 172.24.0.13:6789,172.24.0.14:6789,172.24.0.15:6789 /opt/ceph