- 通過腳本yum真接安裝mariadb在77，87，97上，安裝完成後自動重啓
[root@master data]#vi maridb_yum.sh
#!/bin/bash
ID=`ip a show dev eth0 | sed -r '3!d;s@(.*inet)(.*)(/.*)@\2@' | cut -d. -f4`
rpm -q mariadb-server ||yum install -y mariadb-server
[ -d /data/mysql ] || mkdir -p /data/mysql
[ -d /data/logs ] || mkdir -p /data/logs
chown mysql:mysql /data/{mysql,logs}
sed -i 's@datadir=/var/lib/mysql@datadir=/data/mysql@' /etc/my.cnf
grep "log-bin" /etc/my.cnf || sed -i '/\[mysqld\]/a log-bin=/data/logs/bin' /etc/my.cnf
rep "innodb_file_per_table" /etc/my.cnf || sed -i '/\[mysqld\]/a innodb_file_per_table = on' /etc/my.cnf
grep "skip_name_resolve" /etc/my.cnf || sed -i '/\[mysqld\]/a skip_name_resolve = on' /etc/my.cnf
grep "server-id" /etc/my.cnf || sed -i "/\[mysqld\]/a server-id=$ID" /etc/my.cnf
service mariadb restart
- 修改slave數據庫的配置
[root@slave1 ~]#vi /etc/my.cnf
[mysqld]
read_only
relay_log_purge=0
[root@slave1 ~]#systemctl restart mariadb
[root@slave2 ~]#vi /etc/my.cnf
[mysqld]
read_only
[root@slave2 ~]#systemctl restart mariadb
- 在主服務器上記錄複製位置
MariaDB [(none)]> show master logs;
- 在主服務器創建同步帳號
MariaDB [(none)]> grant replication slave on *.* to repluser'192.168.205.%' identified by 'centos';
- 分別在從服務器上修改change master to
CHANGE MASTER TO
MASTER_HOST='192.168.205.77',
MASTER_USER='repluser',
MASTER_PASSWORD='centos',
MASTER_PORT=3306,
MASTER_LOG_FILE='bin.000003', #此文件跟據主上的show master logs
MASTER_LOG_POS=245; #此位置跟據主上的show master logs
- 在所有的從節點上啓動i/o線和relay線程
MariaDB [(none)]> satar slave
MariaDB [(none)]> show slave status;
配置半同步複製
- 記錄半同步插件的文件名稱
[root@master ~]#rpm -ql mariadb-server
/usr/lib64/mysql/plugin/semisync_master.so
/usr/lib64/mysql/plugin/semisync_slave.so
- 在主服務器和從服務器上安裝半同步插件
MariaDB [(none)]> install plugin rpl_semi_sync_master soname 'semisync_master.so';
- 查看半同步的狀態
MariaDB [(none)]> show global variables like '%semi%' ;
+------------------------------------+-------+
| Variable_name | Value |
+------------------------------------+-------+
| rpl_semi_sync_master_enabled | OFF | #半同步默認off
| rpl_semi_sync_master_timeout | 10000 | #超時毫秒，10秒
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_no_slave | ON |
+------------------------------------+-------+
4 rows in set (0.00 sec)
- 啓用半同步
MariaDB [(none)]> set global rpl_semi_sync_master_enabled=on;
Query OK, 0 rows affected (0.00 sec)
- 查看半同步狀態信息
MariaDB [(none)]> show global status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 0 |
| Rpl_semi_sync_master_net_avg_wait_time | 0 |
| Rpl_semi_sync_master_net_wait_time | 0 |
| Rpl_semi_sync_master_net_waits | 0 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON |
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 0 |
| Rpl_semi_sync_master_tx_wait_time | 0 |
| Rpl_semi_sync_master_tx_waits | 0 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 0 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec)
- 在所有的從節點安裝slave semi插件；
MariaDB [(none)]> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show plugins;
…
| rpl_semi_sync_slave | ACTIVE | REPLICATION | semisync_slave.so | GPL |
+--------------------------------+----------+--------------------+-------------------+---------+
43 rows in set (0.00 sec)
- 查看所有從節點的半同步狀態，並啓用半同步狀態，需要重新啓動線程，再查看半同步狀態是on纔可以
MariaDB [(none)]> show global variables like '%semi%';
+---------------------------------+-------+
| Variable_name | Value |
+---------------------------------+-------+
| rpl_semi_sync_slave_enabled | OFF |
| rpl_semi_sync_slave_trace_level | 32 |
+---------------------------------+-------+
2 rows in set (0.00 sec)
MariaDB [(none)]> set global rpl_semi_sync_slave_enabled=on;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show global variables like '%semi%';
+---------------------------------+-------+
| Variable_name | Value |
+---------------------------------+-------+
| rpl_semi_sync_slave_enabled | ON |
| rpl_semi_sync_slave_trace_level | 32 |
+---------------------------------+-------+
2 rows in set (0.00 sec)
MariaDB [(none)]> stop slave;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show global status like '%semi%';
+----------------------------+-------+
| Variable_name | Value |
+----------------------------+-------+
| Rpl_semi_sync_slave_status | ON |
+----------------------------+-------+
1 row in set (0.00 sec)
- 此時查看主節點的狀態
MariaDB [(none)]> show global status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 2 | #表示已經有兩個客戶端，說明成功
| Rpl_semi_sync_master_net_avg_wait_time | 0 |
| Rpl_semi_sync_master_net_wait_time | 0 |
| Rpl_semi_sync_master_net_waits | 0 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON | #狀態是on表半同步打開
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 0 |
| Rpl_semi_sync_master_tx_wait_time | 0 |
| Rpl_semi_sync_master_tx_waits | 0 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 0 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec)
實現MHA管理
- 安裝從mha網站下載的mha rpm軟件包，依賴包要去epel下載，所以要啓用epel源
[root@MHA ~]#yum install mha4mysql-manager-0.56-0.el6.noarch.rpm mha4mysql-node-0.56-0.el6.noarch.rpm
- 所有節點上安裝node包，無論主不是從，mha都會當做一個node來看
[root@master ~]#yum install mha4mysql-node-0.56-0.el6.noarch.rpm
[root@slave1 data]#yum install mha4mysql-node-0.56-0.el6.noarch.rpm
[root@slave2 data]#yum install mha4mysql-node-0.56-0.el6.noarch.rpm
- 在主服務器上創建帳號做爲mha的監控帳號使用
MariaDB [(none)]> grant all on *.* to mhauser@'192.168.205.%' identified by 'centos';
- 由於主從在切換時，MHA要修改配置文件等，所以需要ssh key驗證，我們採用速的方法，直接在本地產生key和authorized文件一併複製到所有節點
[root@MHA ~]#ssh-keygen
[root@MHA ~]#ssh-copy-id 192.168.205.67
[root@MHA ~]#cat .ssh/authorized_keys
[root@MHA ~]#scp -r .ssh 192.168.205.77:/root/
[root@MHA ~]#scp -r .ssh 192.168.205.87:/root/
[root@MHA ~]#scp -r .ssh 192.168.205.97:/root/
- MHA配置文件沒有，我們直接按照如下創建
[root@MHA ~]#mkdir /etc/mha
[root@MHA ~]#vim /etc/mha/app1.cnf
[server default]
master_binlog_dir=/data/logs/
user=mhauser #這個帳號爲mha監控mysql的帳號
password=centos #帳號的密碼
manager_workdir=/data/mastermha/app1/ #配置文件的存放位置
manager_log=/data/mastermha/app1/manager.log #日誌的存放位置
remote_workdir=/data/mastermha/app1/
ssh_user=root #SSH key連接的用戶名
repl_user=repluser #複製帳號，也就是我們上面創建的複製帳號名
repl_password=centos #複製帳號的密碼
ping_interval=1 #檢測間隔爲每一秒
[server1] #定議節點服務器
hostname=192.168.205.77
candidate_master=1
[server2]
hostname=192.168.205.87
[server3]
hostname=192.168.205.97
candidate_master=1 #表示當主不可用時優先提升爲主的從服務器
- 啓動之前進行檢查ssh，repl複製是否準備好, 如果successful 我們可以進行下一步。
[root@MHA ~]#masterha_check_ssh --conf=/etc/mha/app1.cnf
[root@MHA ~]#masterha_check_repl --conf=/etc/mha/app1.cnf
- 起動進程，此進程前臺運行，當主節點失敗時切換完成後它會終止，所以要想持續要重啓進程
[root@MHA ~]#masterha_manager --conf=/etc/mha/app1.cnf
Mon Aug 12 23:33:22 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Aug 12 23:33:22 2019 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Mon Aug 12 23:33:22 2019 - [info] Reading server configuration from /etc/mha/app1.cnf..
實現proxysql
- 我們直接在兩個proxysql服務器上創建yum源來安裝proxysql
cat <<EOF | tee /etc/yum.repos.d/proxysql.repo
[proxysql_repo]
name= ProxySQL YUM repository
#baseurl=https://repo.proxysql.com/ProxySQL/proxysql-2.0.x/centos/\$releasever
baseurl=https://repo.proxysql.com/ProxySQL/proxysql-1.4.x/centos/\$releasever
gpgcheck=1
gpgkey=https://repo.proxysql.com/ProxySQL/repo_pub_key
EOF
- 因爲proxysql是一個基於輕量的數據庫配置的，所以我們需要一個sql客戶端來連接設置proxysql
[root@proxysql1 ~]#yum install proxysql mariadb
[root@proxysql2 ~]#yum install proxysql mariadb
- 啓動服務器查看端口，其中6032爲proxysql的數據庫端口，6033爲proxysql的用戶連接端口
[root@proxysql1 ~]#service proxysql start
[root@proxysql2 ~]#service proxysql start
[root@proxysql1 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:6032 *:*
LISTEN 0 128 *:6033 *:*
LISTEN 0 128 *:6033 *:*
LISTEN 0 128 *:6033 *:*
LISTEN 0 128 *:6033 *:*
- proxysql默認的用戶名和密碼是admin admin， 監聽端口爲6032,
[root@proxysql1 ~]#mysql -uadmin -padmin -P6032 -h127.0.0.1
- 在所有的proxysql註冊sql server的節點，包括所有的主從節點，使有和insert插入記錄到mysql_servers庫用
MySQL [(none)]> insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.205.77',3306);
MySQL [(none)]> insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.205.87',3306);
MySQL [(none)]> insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.205.97',3306);
MySQL [(none)]> load mysql servers to runtime;
MySQL [(none)]> save mysql servers to disk;
- 查看一下我們剛纔添加的主機記錄是否在庫中
MySQL [(none)]> select * from mysql_servers;
- 由於proxysql是查看主和從的數據的read_only來判讀誰是主誰是從的，所以建立一賬號用來連接到主和從服務器上，我們要在主節點上建立這個帳號，它會複製到從節點上
MariaDB [(none)]> grant replication client on *.* to monitor@'192.168.205.%' identified by 'centos';
- 在所有的proxysql服務器設置監控賬號，保存狀態
MySQL [(none)]> set mysql-monitor_username='monitor';
MySQL [(none)]> set mysql-monitor_password='centos';
MySQL [(none)]> load mysql variables to runtime;
MySQL [(none)]> save mysql variables to disk;
- 查看一下相關的日誌，以前出錯的原因是因爲默認沒使用monitor密碼是monitor進行連接(在proxysql.cnf中可以看到)，所以會出錯，當你添加完帳號就成功了,
MySQL [(none)]> select * from mysql_server_connect_log;
MySQL [(none)]> select * from mysql_server_ping_log;
- 需要修改的是main庫中的mysql_replication_hostgroups表，該表有3個字段：writer_hostgroup, reader_hostgroup，comment, 指定寫組的id爲10，讀組的id爲20
MySQL [(none)]> insert into mysql_replication_hostgroups values(10,20,"test");
MySQL [(none)]> load mysql servers to runtime;
MySQL [(none)]> save mysql servers to disk;
- proxySQL會跟據剛纔連接帳號判斷read_only並自動的把三個服務器按讀寫組加到這個表中了
MySQL [(none)]> select hostgroup_id,hostname,port,status,weight from mysql_servers;
MySQL [(none)]> select * from mysql_server_read_only_log;
- 在主服務器上設置一個帳號用來測試
MySQL [(none)]> grant all on *.* to sqluser@'192.168.205.%' identified by 'centos';
- 在proxysql服務器上設置這個帳號的缺省組爲10
MySQL [(none)]> insert into mysql_users(username,password,default_hostgroup) values('sqluser','centos',10);
MySQL [(none)]> load mysql users to runtime;
MySQL [(none)]> save mysql users to disk;
- 此時proxysql還是不知道那些sql語句算讀，那些爲寫，我們要定義好，讓它來區別併發送到不同的組服務器上,其中10爲寫，20組爲讀
MySQL [(none)]>insert into mysql_query_rules
(rule_id,active,match_digest,destination_hostgroup,apply) VALUES
(1,1,'^SELECT.*FOR UPDATE$',10,1),(2,1,'^SELECT',20,1);
MySQL [(none)]>load mysql query rules to runtime;
MySQL [(none)]>save mysql query rules to disk;
- 查看一下你添加的規則
MySQL [(none)]>select rule_id,active,match_digest,destination_hostgroup,apply from mysql_query_rules;
- 測試連接並實現讀，可以看到一會調度到87，一會調度到97
mysql -usqluser -pcentos -P6033 -h127.0.0.1 -e 'select @@server_id'
- 如果使用事務不能發送到讀服務器，只會發送到主服務器
mysql -usqluser -pcentos -P6033 -h127.0.0.1 -e 'begin;select @@server_id;commit'
mysql -usqluser -pcentos -P6033 -h127.0.0.1 -e 'create database testdb'
mysql -usqluser -pcentos testdb -P6033 -h127.0.0.1 -e 'create table t1(id int)'
- 我們可以用下列查詢看調度是否成功，並調度到那臺服務器上
select hostgroup hg,sum_time,count_star,digest_text from stats_mysql_query_digest order by sum_time desc;
實現proxysql的keepalive
- 使用yum安裝keepalvie，psmisc，psmisc中有個命令爲killall可以檢測到進程的狀態，keepalive會使用這個做爲腳本檢測進行是否運行
[root@proxysql1 ~]#yum install keepalived ipvsadm psmisc
[root@proxysql2 ~]#yum install keepalived ipvsadm psmisc
- 修改keepalive配置文件
[root@proxysql1 ~]#vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_1
vrrp_mcast_group4 224.0.0.100
}
# Script used to check if Proxy is running
vrrp_script check_proxy { #定義腳本測試proxysql的進程，如果進程down實現主備切換
script "killall -0 proxysql" #監控進程
interval 2 #每二秒監控一次
weight -30 #進程down時priority減30
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 45
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.205.45/24 dev eth0 label eth0:0
}
track_script {
check_proxy
}
}
[root@proxysql1 ~]#systemctl start keepalived
- 修改proxysql2的keepalive
[root@proxysql2 ~]#vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_2
vrrp_mcast_group4 224.0.0.100
}
# Script used to check if Proxy is running
vrrp_script check_proxy {
script "killall -0 proxysql"
interval 2
weight -30
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 45
priority 80
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.205.45/24 dev eth0 label eth0:0
}
track_script {
check_proxy
}
}
[root@proxysql2 ~]#systemctl start keepalived
- 在proxysql1上查看IP，可以看到vip 192.168.205.45, 停掉服務，看一下IP
[root@proxysql1 ~]#ip a
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:37:f9:93 brd ff:ff:ff:ff:ff:ff
inet 192.168.205.47/24 brd 192.168.205.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet 192.168.205.45/24 scope global secondary eth0:0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe37:f993/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@proxysql1 ~]#systemctl stop proxysql
- 在proxysql2上查看可以看到vip 192.168.205.45已經飄到了proxysql2上
[root@proxysql2 ~]#ip a
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:cf:e5:bb brd ff:ff:ff:ff:ff:ff
inet 192.168.205.57/24 brd 192.168.205.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet 192.168.205.45/24 scope global secondary eth0:0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fecf:e5bb/64 scope link noprefixroute
valid_lft forever preferred_lft forever
- 我們測試一下能否通過web server通過連接vip連接到後端的服務器，從而實現讀寫分離
[root@web1 data]#mysql -uwordpress -pcentos -P6033 -h192.168.205.45
安裝rsync server做爲nfs backup服務器
- 安裝rsync服務
[root@nfs2 data]#yum install rsync
- 編輯rsyncd.conf文件，讓rsyncc以daemon的方式運行
[root@nfs2 data]#vi /etc/rsyncd.conf
uid = root #以什麼身份開啓服務
gid = root
use chroot = no
max connections = 0 #不限制連接
ignore errors #忽略錯誤
exclude = lost+found/
log file = /var/log/rsyncd.log
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsyncd.lock
reverse lookup = no 反向解析名稱與ip
hosts allow = 192.168.205.0/24 充許連接的主機列表
[backup] 起名子
path = /data/www/
comment = webserver www backup
read only = no 可以寫
auth users = rsync
secrets file = /etc/rsync.pass 密碼文件
- 服務器端生成驗證文件
[root@nfs2 data]#echo "rsync:centos" > /etc/rsync.pass
[root@nfs2 data]#chmod 600 /etc/rsync.pass
- 服務器端準備目錄
[root@nfs2 data]#mkdir /data/www
- 服務器端啓動rsync服務
[root@nfs2 data]#systemctl start rsyncd
啓用NFS服務器
- 啓用epel
[root@nfs1 data]#yum install inotify-tools nfs-utils rsync
- 創建目錄
[root@nfs1 data]#mkdir /data/www
- 創建用戶nginx用戶
[root@nfs1 data]# useradd -s /sbin/nologin nginx -u 2000
[root@nfs1 data]# id nginx
uid=2000(nginx) gid=2000(nginx) groups=2000(nginx)
- 修改NFS配置文件，共享www目錄
[root@nfs1 data]# vi /etc/exports
/data/www 192.168.205.0/24(rw,all_squash,anonuid=2000,anongid=2000)
[root@nfs1 data]# systemctl restart nfs-server
- 將NFS服務器配置爲rsync的客戶端，先配置密碼文件
[root@nfs1 data]#echo "centos" > /etc/rsync.pass
[root@nfs1 data]#chmod 600 /etc/rsync.pass
- 安裝inotify實現實時同步數據，客戶端創建inotify_rsync.sh腳本
[root@nfs1 data]#cat inotify_rsync.sh
#!/bin/bash
SRC='/data/www/'
DEST='[email protected]::backup'
inotifywait -mrq --timefmt '%Y-%m-%d %H:%M' --format '%T %w %f' \
-e create,delete,moved_to,close_write,attrib ${SRC} | \
while read DATE TIME DIR FILE;do
FILEPATH=${DIR}${FILE}
rsync -az --delete --password-file=/etc/rsync.pass $SRC $DEST && echo "At ${TIME} \
on ${DATE}, file $FILEPATH was backuped up via rsync" >> /var/log/changelist.log
done
- 將腳本文件存在rc.local中，啓動進會自動執行
[root@nfs1 data]#chmod +x inotify_rsync.sh
[root@nfs1 data]#vi /etc/rc.d/rc.local
/data/inotify_rsync.sh &
[root@nfs1 data]#chmod +x /etc/rc.d/rc.local
- 在web server中實現掛載，安裝nfs-utils工具纔可以mount NFS文件系統
[root@web1 ~]#yum install nfs-utils
[root@web2 ~]#yum install nfs-utils
- 測試連接NFS服務器的共享文件
[root@web1 ~]#showmount -e 192.168.205.27
Export list for 192.168.205.27:
/data/www 192.168.205.0/24
[root@web1 ~]#mount 192.168.205.27:/data/www /data/www
[root@web2 ~]#mount 192.168.205.27:/data/www /data/www
[root@web1 ~]#df
[root@web2 ~]#df
- 在兩個web server中將mount寫入到fstab文件中，實現開機自動mount
[root@web1 ~]##vi /etc/fstab
192.168.205.27:/data/www /app/httpd24/htdocs nfs defaults 0 0
安裝nginx和php
- 複製nginx和php源碼文件到一個目錄中在兩個web服務器上
nginx-1.16.1.tar.gz
php-7.3.7.tar.xz
- 執行nginx安裝腳本在同一個目錄中
[root@web2 ~]#cat nginx_install_bin.sh
#!/bin/bash
#########################
#difination variables
#########################
TMP_DIR=`pwd`
NGINX="nginx-1.16.1.tar.gz"
NGINX_DIR=`echo "$NGINX" |rev | cut -d. -f3- | rev`
INS_DIR="/apps/nginx"
##########################
#Packges check and install
##########################
pkg(){
for i in $PKGS; do
rpm -q $i &> /dev/null && echo "Packge `rpm -q $i` is installed" || yum -y install $i
done
}
#####################
#NGINX INSTALLATION
#1.unarchive binary
####################
#install dependency packges,just add packges name to variable PKGS separate by SPACE.
#Example PKGS="libaio gcc glibc"
nginx_ins(){
PKGS="gcc pcre-devel openssl-devel zlib-devel"
pkg
cd $TMP_DIR
[ -e $TMP_DIR/$NGINX ] || wget -c http://nginx.org/download/$NGINX
tar xf $TMP_DIR/$NGINX
cd $NGINX_DIR
./configure \
--prefix=$INS_DIR \
--conf-path=/etc/nginx/nginx.conf \
--error-log-path=/var/log/nginx/error.log \
--http-log-path=/var/log/nginx/access.log \
--pid-path=/var/run/nginx.pid \
--lock-path=/var/run/nginx.lock \
--user=nginx \
--group=nginx \
--with-http_ssl_module \
--with-http_v2_module \
--with-http_dav_module \
--with-http_stub_status_module \
--with-http_gzip_static_module \
--with-http_realip_module \
--with-pcre \
--with-threads \
--with-file-aio \
--with-stream \
--with-stream_ssl_module \
--with-stream_realip_module
if [ $? -eq 0 ]; then
make -j 4 && make install
cd $TMP_DIR
rm -rf $HTTPD_DIR
else
echo "please remake and make install"
fi
id nginx || useradd nginx -s /sbin/nologin -u 2000
chown nginx:nginx -R $INS_DIR
echo "$INS_DIR/sbin/nginx" >> /etc/rc.d/rc.local
chmod +x /etc/rc.d/rc.local
ln -s $INS_DIR/sbin/nginx /sbin/nginx
nginx
}
###############
#OPTIONS SELECT
###############
case $1 in
install)
nginx_ins
;;
remove)
nginx_rm
;;
*)
echo "Useage $0 $1 install|remove"
;;
esac
[root@web2 ~]#./nginx_install_bin.sh install
- 執行如下腳本安裝php
[root@web2 ~]#cat apache_php_install.sh
#!/bin/bash
#########################
#difination variables
#########################
TMP_DIR=`pwd`
APR="apr-1.7.0.tar.bz2"
APR_UTIL="apr-util-1.6.1.tar.bz2"
HTTPD="httpd-2.4.39.tar.bz2"
PHP="php-7.3.7.tar.xz"
HTTPD_DIR=`echo "$HTTPD" |rev | cut -d. -f3- | rev`
APR_DIR=`echo "$APR" |rev | cut -d. -f3- | rev`
APR_UTIL_DIR=`echo "$APR_UTIL" | rev | cut -d. -f3- | rev`
PHP_DIR=`echo "$PHP" | rev | cut -d. -f3- | rev`
INS_HTTPD_DIR=/app/httpd24
INS_PHP_DIR=/app/php
##########################
#Packges check and install
##########################
pkg(){
for i in $PKGS; do
rpm -q $i &> /dev/null && echo "Packge `rpm -q $i` is installed" || yum -y install $i
done
}
#####################
#APACHE INSTALLATION
#1.unarchive binary
####################
#install dependency packges,just add packges name to variable PKGS separate by SPACE.
#Example PKGS="libaio gcc glibc"
httpd_ins(){
PKGS="gcc prce-devel openssl-devel expat-devel lbzip2"
pkg
cd $TMP_DIR
if [ -e $TMP_DIR/$HTTPD ]; then
tar xf $HTTPD
else
echo "file $HTTPD does not exist, pleases download it"
exit
fi
if [ -e $TMP_DIR/$APR ]; then
tar xf $APR
mv $APR_DIR $HTTPD_DIR/srclib/apr
else
echo "file $APR does not exist, pleases download it"
exit
fi
if [ -e $TMP_DIR/$APR_UTIL ]; then
tar xf $APR_UTIL
mv $APR_UTIL_DIR $HTTPD_DIR/srclib/apr-util
else
echo "file $APR_UTIL does not exist, pleases download it"
exit
fi
########################
#2.make and make install
########################
id apache||useradd -r -s /sbin/nologin apache
cd $HTTPD_DIR
./configure \
--prefix=$INS_HTTPD_DIR \
--enable-so \
--enable-ssl \
--enable-cgi \
--enable-rewrite \
--with-zlib \
--with-pcre \
--with-included-apr \
--enable-modules=most \
--enable-mpms-shared=all \
--with-mpm=prefork
if [ $? -eq 0 ]; then
make -j 4 && make install
cd $TMP_DIR
rm -rf $HTTPD_DIR
else
echo "please remake and make install"
fi
#####################
#3. modify config files
######################
sed -ri 's@^(.*) daemon$@\1 apache@' $INS_HTTPD_DIR/conf/httpd.conf
sed -ri 's@DirectoryIndex@DirectoryIndex index.php @' $INS_HTTPD_DIR/conf/httpd.conf
sed -ri 's@#(LoadModule proxy_module modules/mod_proxy.so)@\1@' $INS_HTTPD_DIR/conf/httpd.conf
sed -ri 's@#(LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so)@\1@' $INS_HTTPD_DIR/conf/httpd.conf
sed -ri 's@#(LoadModule proxy_fdpass_module modules/mod_proxy_fdpass.so)@\1@' $INS_HTTPD_DIR/conf/httpd.conf
cat >> $INS_HTTPD_DIR/conf/httpd.conf <<-EOF
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
ProxyRequests Off
ProxyPassMatch "^/.*\.php(/.*)?$" "fcgi://localhost:9000/app/httpd24/htdocs/"
EOF
echo "PATH=$INS_HTTPD_DIR/bin:\$PATH" > /etc/profile.d/httpd.sh
source /etc/profile.d/httpd.sh
echo "$INS_HTTPD_DIR/bin/apachectl start" >> /etc/rc.d/rc.local
chmod +x /etc/rc.d/rc.local
apachectl start
}
#########################
#PHP INSALLATION
#1. unarchive install packge
#########################
php_ins(){
PKGS="libxml2-devel bzip2-devel libmcrypt-devel gd-devel"
pkg
cd $TMP_DIR
echo $TMP_DIR
if [ -e $TMP_DIR/$PHP ]; then
tar xvf $PHP
else
echo "files $PHP does not exist, pleases download it"
exit
fi
#######################
#2. make and make install
#######################
cd $PHP_DIR/
./configure \
--prefix=$INS_PHP_DIR \
--enable-mysqlnd \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--with-openssl \
--with-freetype-dir \
--with-jpeg-dir \
--with-png-dir \
--with-zlib \
--with-libxml-dir=/usr \
--with-config-file-path=/etc \
--with-config-file-scan-dir=/etc/php.d \
--enable-mbstring \
--enable-xml \
--enable-sockets \
--enable-fpm \
--enable-maintainer-zts \
--disable-fileinfo \
--with-gd \
--with-imap\
--with-ldap\
--with-odbcver\
--with-iodbc\
--with-pear\
--with-libxml-dir\
--with-xmlrpc\
--enable-mbstring\
--with-mhash\
--with-gettext
if [ $? -eq 0 ]; then
make && make install
else
echo "please re make and make install"
fi
######################
#3. modify config file
######################
cp php.ini-production /etc/php.ini
cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
chmod +x /etc/init.d/php-fpm
cd $INS_PHP_DIR/etc
cp php-fpm.conf.default php-fpm.conf
cd php-fpm.d/
cp www.conf.default www.conf
sed -ri 's@(^.*) = nobody@\1 = apache@' $INS_PHP_DIR/etc/php-fpm.d/www.conf
chkconfig --add php-fpm
service php-fpm start
cd $TMP_DIR
rm -rf $PHP_DIR
echo '<?php phpinfo(); ?>' > /app/httpd24/htdocs/index.php
}
##################
#4. remove PHP
#################
rmphp(){
service php-rpm stop
rm /app/php -rf
rm /etc/php.ini -f
chkconfig --del php-fpm
rm /etc/init.d/php-fpm -f
}
################
#5. remove HTTPD
################
rmhttpd(){
apachectl stop
rm /app/httpd24 -rf
sed -i '/\/app\/http24\/bin\/apachectl start/d' /etc/rc.d/rc.local
rm /etc/profile.d/httpd.sh
}
###############
#OPTIONS SELECT
###############
case $1 in
install)
case $2 in
httpd)
httpd_ins
;;
php)
php_ins
;;
*)
echo "Useage $0 $1 httpd|php"
;;
esac
;;
remove)
case $2 in
php)
rmphp
;;
httpd)
rmhttpd
;;
*)
echo "Useage $0 $1 httpd|php"
;;
esac
;;
*)
echo "Useage $0 <install|remove> <php|httpd>"
;;
esac
[root@web2 ~]#./apache_php_install.sh install php
- 修改nginx配置文件
[root@web2 ~]#vi /etc/nginx/nginx.conf
server {
listen 80;
server_name www.zhaoli.com;
location / {
root /data/www;
index index.php index.html index.htm;
}
location ~ \.php$ {
root /data/www;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}
- 修改php配置文件
[root@web2 ~]#vi /app/php/etc/php-fpm.d/www.conf
user = nginx
group = nginx
listen = 127.0.0.1:9000
listen.owner = nginx
listen.group = nginx
listen.mode = 0660
- 將所有配置文件複製到所有的web server中並啓動服務
[root@web2 ~]#nginx -s reload
[root@web2 ~]#service php-fpm restart
- 解壓縮文件 wordpress-5.0.4-zh_CN.tar.gz
[root@web1 data]#tar xf wordpress-5.0.4-zh_CN.tar.gz -C www
- 在主服務器上創建wordpress數據庫及用戶名和密碼
MariaDB [(none)]> CREATE DATABASE wordpress;
MariaDB [(none)]> GRANT ALL PRIVILEGES ON wordpress.* TO "wordpress"@"192.168.205.%" IDENTIFIED BY "centos";
MariaDB [(none)]> FLUSH PRIVILEGES;
- 同樣我也需要將這個帳號在所有的proxysql服務器授權
[root@proxysql1 ~]#mysql -uadmin -padmin -P6032 -h127.0.0.1
[root@proxysql2 ~]#mysql -uadmin -padmin -P6032 -h127.0.0.1
所有proxysql中執行如下：
MySQL [(none)]> insert into mysql_users(username,password,default_hostgroup) values('wordpress','centos',10);
MySQL [(none)]> load mysql users to runtime;
MySQL [(none)]> save mysql users to disk;
- 修改wordpress配置文件
[root@web1 www]#cp wp-config-sample.php wp-config.php
[root@web1 www]#vi wp-config.php
define('DB_NAME', 'wordpress');
define('DB_USER', 'wordpress');
define('DB_PASSWORD', 'centos');
define('DB_HOST', '192.168.205.45:6033'); #注意這裏要添加proxysql vip的地址，端口爲6033
- 生成密鑰，可以使用網站https://api.wordpress.org/secret-key/1.1/salt/ 自動生成，然後直接替換即可
[root@web1 www]#vi wp-config.php
define('AUTH_KEY', ']xRUezwud7/sl9n{5Qv-=VM|uoqaFauAuc3|6wy<w7Dg0qUC7{.4%#>o+HfjC!I+');
define('SECURE_AUTH_KEY', '=e[P3g1~S|:+J@I)f-(:MTf3~h+;hQCg?wuk50NMP)Dgoj3X kL@BDDk%&;zed^`');
define('LOGGED_IN_KEY', 'f,B`O^3qW20-,`k>dHdW8Bt^/]HZ5 -sA1rz$x:|x3R3~!j*}^mw?0|N)YTO<usi');
define('NONCE_KEY', 'x/7V-u*8K^d-|3a&L}/V&2b9K}G+r-q&A7NCWin}h3dP1P( /X;fRzqG1U[,;F_C');
define('AUTH_SALT', 'U,kjv 5&srgsePiCJOxUxc+>HkX#B3:fWbQ;[n^5FD)-4r9C!/+Swwv:k~~HZ|-l');
define('SECURE_AUTH_SALT', ';=3HS/eY&DRN0p1_->e#]%h#x=*Q?Zj]A*tC=@*H$9_T%+SF+!w0?b}f/`#K&[h&');
define('LOGGED_IN_SALT', 'iVWA_K4+X&guJiXc90L4UnQ-#E7+q--rH1_`nhdbSzlC2X.}}R11aua{>8 <hQv:');
define('NONCE_SALT', 'z4,S7_]&70?7^p[o>$n7tJAq]?12ngpfi(]Cl{zfKs>!.Y?9|4@59{R*Q<k(Hg_.');
- 此時我們可以直接訪問web1或web2來測試
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
安裝haproxy
- 在所有的proxy server上安裝HAproxy和keepalived
[root@haproxy1 ~]#yum install haproxy keepalived
[root@haproxy2 ~]#yum install haproxy keepalived
- 修改proxysql1的keepalive配置
[root@haproxy1 ~]#vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_1
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_iptables
vrrp_garp_interval 0
vrrp_gna_interval 0
}
# Script used to check if HAProxy is running
vrrp_script check_haproxy {
script "killall -0 haproxy"
interval 2
weight -30
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 111
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.205.111/24 dev eth0 label eth0:0
}
track_script {
check_haproxy
}
}
- 修改proxysql2的keepalived配置
[root@haproxy2 ~]#vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_2
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_iptables
vrrp_garp_interval 0
vrrp_gna_interval 0
}
# Script used to check if HAProxy is running
vrrp_script check_haproxy {
script "killall -0 haproxy"
interval 2
weight -30
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 111
priority 80
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.205.111/24 dev eth0 label eth0:0
}
track_script {
check_haproxy
}
}
- 啓動服務
[root@haproxy1 ~]#systemctl enable keepalived
[root@haproxy1 ~]#systemctl start keepalived
[root@haproxy2 ~]#systemctl enable keepalived
[root@haproxy2 ~]#systemctl start keepalived
- 修改haproxy配置文件在所有的haproxy server上
[root@haproxy1 ~]#vi /etc/haproxy/haproxy.cfg
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
listen web-80
bind 192.168.205.111:80
server web1 192.168.205.127:80 check inter 3s fall 3 rise 5
server web1 192.168.205.137:80 check inter 3s fall 3 rise 5
- 啓動服務
[root@haproxy1 ~]#systemctl enable haproxy
[root@haproxy1 ~]#systemctl start haproxy
[root@haproxy1 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 192.168.205.111:80 *:*
- 將haprox配置文件複製到haproxy2上並啓動服務
[root@haproxy1 ~]#scp /etc/haproxy/haproxy.cfg 192.168.205.117:/etc/haproxy/
[root@haproxy2 ~]#systemctl enable haproxy
[root@haproxy2 ~]#systemctl start haproxy
- 我們發現沒有監聽192.168.205.111：80端口，因爲默認不會監聽不存在IP的端口
[root@haproxy2 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
- 修改內核參數可以實現監聽，重啓haproxy, 可以看到haproxy2也實現了監聽, 同樣我也需要在haproxy1上加上這個選項否則主失效的情況下，再切回來情況下，haproxy會出錯，無法啓動
[root@haproxy2 ~]#sysctl -a | grep bind
net.ipv4.ip_nonlocal_bind = 0
[root@haproxy2 ~]#vi /etc/sysctl.conf
net.ipv4.ip_nonlocal_bind = 1
[root@haproxy2 ~]#sysctl -p
net.ipv4.ip_nonlocal_bind = 1
[root@haproxy2 ~]#systemctl restart haproxy
[root@haproxy2 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 192.168.205.111:80 *:*
- 通過192.168.205.111訪問web服務器，發現沒有問題
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
- 如果停掉haproxy1的keepalive, 再測試
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
[root@haproxy1 ~]#systemctl stop keepalived
- 恢復keepalived，嘗試停掉haproxy，再測試，發現vip已經切到haproxy2上
[root@haproxy1 ~]#systemctl stop haproxy
[root@haproxy2 ~]#ip a
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:be:a7 brd ff:ff:ff:ff:ff:ff
inet 192.168.205.117/24 brd 192.168.205.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet 192.168.205.111/24 scope global secondary eth0:0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:bea7/64 scope link noprefixroute
valid_lft forever preferred_lft forever
實現firewall
- 爲了簡化我們使用一臺linux的iptables做爲DNAT,確保關閉firewald
[root@centos7 ~]#iptables -t nat -A PREROUTING -s 0/0 -d 202.106.0.17 -p tcp --dport 80 -j DNAT --to-destination 192.168.205.111:80
- 開啓ip轉發功能
[root@centos7 network-scripts]#cat /proc/sys/net/ipv4/ip_forward
0
[root@centos7 network-scripts]#sysctl -w net.ipv4.ip_forward=1
net.ipv4.ip_forward = 1
[root@centos7 ~]#vi /etc/sysctl.conf
net.ipv4.ip_forward = 1
- 安裝iptables service實現自動保存
[root@centos7 ~]#yum install iptables-services
[root@centos7 ~]#iptables-save >/etc/sysconfig/iptables
[root@centos7 ~]#systemctl enable iptables.service
- 注意，Haproxy的默認網關要指向firewall, 兩個webserver也默認網關也要指定firewall, 原因在於webserver回包時直接回到網關，實際是不是這樣，有待考證，但我加了網站才能夠正常訪問
[root@haproxy1 ~]#ip r
default via 192.168.205.17 dev eth0 proto static metric 102
[root@haproxy2 ~]#ip r
default via 192.168.205.17 dev eth0 proto static metric 102
[root@web1 ~]#ip r a default via 192.168.205.17 dev eth0
[root@web1 ~]#ip r
default via 192.168.205.17 dev eth0
[root@web2 ~]#ip r a default via 192.168.205.17 dev eth0
[root@web2 ~]#ip r
default via 192.168.205.17 dev eth0
實現powerdns
- 安裝包：基於EPEL源
yum install -y pdns pdns-backend-mysql mariadb-server
- 創建數據庫
CREATE DATABASE powerdns;
GRANT ALL ON powerdns.* TO 'powerdns'@'127.0.0.1' IDENTIFIED BY 'centos';
USE powerdns;
- 創建powerdns數據庫中的表 (參考https://doc.powerdns.com/md/authoritative/backend-generic-mysql/)
CREATE TABLE domains (
id INT AUTO_INCREMENT,
name VARCHAR(255) NOT NULL,
master VARCHAR(128) DEFAULT NULL,
last_check INT DEFAULT NULL,
type VARCHAR(6) NOT NULL,
notified_serial INT DEFAULT NULL,
account VARCHAR(40) DEFAULT NULL,
PRIMARY KEY (id)
) Engine=InnoDB;
CREATE UNIQUE INDEX name_index ON domains(name);
CREATE TABLE records (
id BIGINT AUTO_INCREMENT,
domain_id INT DEFAULT NULL,
name VARCHAR(255) DEFAULT NULL,
type VARCHAR(10) DEFAULT NULL,
content VARCHAR(64000) DEFAULT NULL,
ttl INT DEFAULT NULL,
prio INT DEFAULT NULL,
change_date INT DEFAULT NULL,
disabled TINYINT(1) DEFAULT 0,
ordername VARCHAR(255) BINARY DEFAULT NULL,
auth TINYINT(1) DEFAULT 1,
PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
CREATE INDEX recordorder ON records (domain_id, ordername);
CREATE TABLE supermasters (
ip VARCHAR(64) NOT NULL,
nameserver VARCHAR(255) NOT NULL,
account VARCHAR(40) NOT NULL,
PRIMARY KEY (ip, nameserver)
) Engine=InnoDB;
CREATE TABLE comments (
id INT AUTO_INCREMENT,
domain_id INT NOT NULL,
name VARCHAR(255) NOT NULL,
type VARCHAR(10) NOT NULL,
modified_at INT NOT NULL,
account VARCHAR(40) NOT NULL,
comment VARCHAR(64000) NOT NULL,
PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX comments_domain_id_idx ON comments (domain_id);
CREATE INDEX comments_name_type_idx ON comments (name, type);
CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);
CREATE TABLE domainmetadata (
id INT AUTO_INCREMENT,
domain_id INT NOT NULL,
kind VARCHAR(32),
content TEXT,
PRIMARY KEY (id)
) Engine=InnoDB;
CREATE INDEX domainmetadata_idx ON domainmetadata (domain_id, kind);
CREATE TABLE cryptokeys (
id INT AUTO_INCREMENT,
domain_id INT NOT NULL,
flags INT NOT NULL,
active BOOL,
content TEXT,
PRIMARY KEY(id)
) Engine=InnoDB;
CREATE INDEX domainidindex ON cryptokeys(domain_id);
CREATE TABLE tsigkeys (
id INT AUTO_INCREMENT,
name VARCHAR(255),
algorithm VARCHAR(50),
secret VARCHAR(255),
PRIMARY KEY (id)
) Engine=InnoDB;
CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);
- 配置PowerDNS使用mariadb作爲後臺數據存儲
vim /etc/pdns/pdns.conf，查找到包含launch= 的行，修改並添加下面的內容
launch=gmysql
gmysql-host=localhost
gmysql-port=3306
gmysql-dbname=powerdns
gmysql-user=powerdns
gmysql-password=centos
- 啓動服務
systemctl start pdns
systemctl enable pdns
- 安裝httpd和php相關包
yum -y install httpd php php-devel php-gd php-mcrypt php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-mhash gettext wget
systemctl start httpd
systemctl enable httpd
- 下載poweradmin程序，並解壓縮到相應目錄
cd /var/www/html
wget http://downloads.sourceforge.net/project/poweradmin/poweradmin-2.1.7.tgz
tar xvf poweradmin-2.1.7.tgz
mv poweradmin-2.1.7 /var/www/html/poweradmin
- 訪問下面地址，啓動PowerAdmin的網頁安裝嚮導，選擇英文然後 go to step2：
http://192.168.205.147/poweradmin/install/
- 提供先前配置的數據庫詳情，同時爲Poweradmin設置管理員密碼
Username: 爲上面91步創建的用戶名,此處應該爲powerdns
password:爲上面91步創建的密碼應該爲centos
database type :爲myql
hostname： 爲mysql主服務器的IP
DB port: 爲默認的3306
database: 爲上面9步創建的數據庫名稱powerdns
poweradmin adminstrator pasword: 此處爲powerdns會自動創建一個web管理員名爲admin的用戶，此爲admin的密碼
- 爲Poweradmin創建一個受限用戶，powerDNS會使用這個帳戶來更新powerdns數據庫，上面的只是用來連接數據庫，此處爲真正更新時使用的帳戶
Username：更新的用戶名
Password：上述用戶的密碼
Hostmaster：當創建SOA記錄指定默認主機管理員
Primary nameserver：主域名服務器，此處應該爲192.168.205.17
Secondary namesever: 輔域名服務器, 沒有輔助服務器，可以不添
- 跟據上面的輸入，他會自動產生sql語句，按照下面頁面說明，在數據庫中192.168.205.147創建用戶並授權
MariaDB [powerdns]> GRANT SELECT, INSERT, UPDATE, DELETE ON powerdns.* TO 'poweradmin'@'127.0.0.1' IDENTIFIED BY 'centos1';
- 按下面頁面說明，創建config.in.php文件內容
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
vim /var/www/html/poweradmin/inc/config.inc.php
- 刪除install目錄
rm -rf /var/www/html/poweradmin/install/
- 登錄http://202.106.0.17/poweradmin/
username：admin
password：admin 參看第96步
- 添加主機記錄在powerdns上
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
- 在客戶端的windows中測試dns解析
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
![架構測試：HAproxy實現負載均衡，前端爲nginx+php，數據庫實現讀寫分離和高可用]()
