CEPH a deployment (CEPH environment preparation)

Built environment preparation before CEPH

1. Prepare the physical host and the other six host deployment, configuration ip address, host name, turn off the firewall and SElinux (best new host or virtual machine)
2. Prepare 'rhcs2.0-rhosp-20161113-x86_64.iso' image file (search of Mother)

First, the deployment of six respectively corresponding host ip and hostname

IP addresses	CPU name
192.168.4.1	node1
192.168.4.2	node2
192.168.4.3	node3
192.168.4.4	node4
192.168.4.5	node5
192.168.4.6	node6

Second, the local DNS parse arranged on a physical host

Profiles:/etc/hosts

Quick Configuration # for loop (↓ used as a terminal)

for i in {1..6}
do 
echo -e "192.168.4.$i\tnode$i.da.cn\tnode$i" >>/etc/hosts
#\t是tab键，echo命令需使用-e选项才能生效
done

Third, each of the remote server in advance save key scanning to the machine, does not need to answer Yes ssh (physical host operation)

Key to save the file:/root/.ssh/known_hosts

ssh-keyscan command # key scan command

ssh-keyscan node{1..6} > /root/.ssh/known_hosts
#node{1..6},相当于for循环执行

Attaining free dense landing (physical host operation)

# Use ssh keys for rapid transmission loop

for i in {1..6}
do
ssh-copy-id node$i
done

V. mount rhcs2.0-rhosp-20161113-x86_64.iso yum mirrored to the shared directory (in this case using HTTP) (physical host operation)

mkdir /var/www/html/rhcs
mount -a /root/rhcs2.0-rhosp-20161113-x86_64.iso /var/www/html/rhcs
#mount -a选项是开机自动挂载，记录在/etc/fstab文件里

Sixth, the physical host configuration yum source (physical host operation)

rhcs2.0-rhosp-20161113-x86_64.iso mirror comprises three warehouse source, respectively “mon”、“osd”、“tools”

vim /etc/yum.repos.d/da.repo

#配置文件开始
[rhel7]
name=rhel7
baseurl=http://192.168.4.254:83/rhel7 #自定义yum源分享目录路径
enabled=1
gpgcheck=0
[mon]
name=mon
baseurl=http://192.168.4.254:83/rhcs/mon #自定义yum源分享目录路径并查看步骤五创建的目录位置
enabled=1
gpgcheck=0
[osd]
name=osd
baseurl=http://192.168.4.254:83/rhcs/osd #自定义yum源分享目录路径并查看步骤五创建的目录位置
enabled=1
gpgcheck=0
[tools]
name=tools
baseurl=http://192.168.4.254:83/rhcs/tools #自定义yum源分享目录路径并查看步骤五创建的目录位置
enabled=1
gpgcheck=0
#配置文件结束，wq保存退出

Seven passes yum configuration on the physical host to another host 6 (physical host operation)

# Using a for loop

for i in {1..6}
do
scp /etc/yum.repos.d/da.repo node$i:/etc/yum.repos.d/
done

Experimental topology

Experimental substantially topology

CEPH node configuration

This case will be used as a management node node node1

First, the local DNS parse the configuration of each host node is node1

Profiles:/etc/hosts

Quick Configuration # for loop (↓ used as a terminal)

for i in {1..6}
do 
echo -e "192.168.4.$i\tnode$i.da.cn\tnode$i" >>/etc/hosts
#\t是tab键，echo命令需使用-e选项才能生效
done

I. 1. The transfer node1 local DNS resolution files to the remaining five hosts

# Using a for loop

for i in node{2..6}
do
scp /etc/hosts $i:/etc/
done

Second, save the key for each host node node1

Key to save the file:/root/.ssh/known_hosts

ssh-keyscan command # key scan command

ssh-keyscan node{1..6} > /root/.ssh/known_hosts
#node{1..6},相当于for循环执行

Third, generates a public key and a node key is node1

ssh-keygen -f /root/.ssh/id_rsa -N ''
#非交互式生成密钥对

Fourth, implement remote node node1 individual hosts free dense landing (myself included node1) (node1 operation)

# Use ssh keys for rapid transmission loop

for i in node{1..6}
do
ssh-copy-id $i
done

5, configuration time server (Node6 operation) is Node6 node (client)

Five, 1-pack

yum -y install chrony

V. 2. modify the configuration file chrony

vim /etc/chrony.conf

server 0.centes.pool.ntp.org iburst
#server 1.centes.pool.ntp.org iburst
#server 2.centes.pool.ntp.org iburst
#server 3.centes.pool.ntp.org iburst
#只保留0，其余三个全部注释
#在下面添加以下两行配置：
allow 192.168.4.0/24 #允许192.168.4.0网段校验时间

local stratum 10 #10为自定义数值
#时间服务器的层级为10级

#保存退出

V. 3. Start Services

systemctl restart chronyd

6. In order to node1-5 configured as an NTP server (node6) Client

VI 1. Modify Profile

vim /etc/chrony.conf

#server 0.centes.pool.ntp.org iburst
#server 1.centes.pool.ntp.org iburst
#server 2.centes.pool.ntp.org iburst
#server 3.centes.pool.ntp.org iburst
#注释掉0-3
#在下面添加以下一行配置：
server 192.168.4.6 iburst #指定NTP服务器地址

#保存退出

VI 2. Start Services

systemctl restart chronyd

Sixth, 3. check time (with node6 synchronization time)

ntpdate 192.168.4.6

Seven, each additive is node1-3 hard (physical host operation) of 3 Fast 10GB

# Note: You can add graphics commands can also be added, in this case using a virtual machine, and use the command to add the hard way

In the case of a virtual machine can not be shut down, adding a hard disk directly

cd /var/lib/libvirt/images

qemu-img create -f qcow2 node1-vdb.vol 10G
qemu-img create -f qcow2 node1-vdc.vol 10G
qemu-img create -f qcow2 node1-vdd.vol 10G

qemu-img create -f qcow2 node2-vdb.vol 10G
qemu-img create -f qcow2 node2-vdc.vol 10G
qemu-img create -f qcow2 node2-vdd.vol 10G

qemu-img create -f qcow2 node3-vdb.vol 10G
qemu-img create -f qcow2 node3-vdc.vol 10G
qemu-img create -f qcow2 node3-vdd.vol 10G3