- MGR 集群
- Redis的编译安装
环境清理：
===================================
三台机器都做：
修改主机名
修改/etc/hosts
关闭和禁用防火墙
关闭和禁用SELinux
生成密钥对
传输密钥对
验证免密登陆
安装数据库：每个机器都做
mount /dev/sr0 /mnt yum install mysql-server -y systemctl start mysqld systemctl stop mysqld
第一个服务器：（主服务器）
编写配置文件：
cd /etc/my.cnf.d/ vim mysql-server.cnf 追加内容： disabled_storage_engines="MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY" #server_id确保每个机器不一样 server_id=1 gtid_mode=ON enforce_gtid_consistency=ON log_bin=binlog log_slave_updates=ON binlog_format=ROW master_info_repository=TABLE relay_log_info_repository=TABLE transaction_write_set_extraction=XXHASH64 plugin_load_add='group_replication.so' #uuid确保每个机器都一样，可以用uuidgen生成 group_replication_group_name="8e1969ec-3ae3-4bd1-b80f-6de58b837ff5" group_replication_start_on_boot=off #当前主机的主机名和复制组端口，建议用主机名 group_replication_local_address= "mgr01:33061" group_replication_group_seeds= "mgr01:33061,mgr02:33061,mgr03:33061" group_replication_bootstrap_group=off
配置文件编辑完成
#启动数据库服务
[root@mgr01 ~]# systemctl start mysqld [root@mgr01 ~]# mysql -uroot -p mysql> use mysql;
#创建复制组的用户
mysql> SET SQL_LOG_BIN=0; mysql> CREATE USER rpl_user@'%' IDENTIFIED BY 'Test@1234'; mysql> GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%'; mysql> GRANT BACKUP_ADMIN ON *.* TO rpl_user@'%'; mysql> FLUSH PRIVILEGES; mysql> SET SQL_LOG_BIN=1;
#复制用户凭据到复制组通道
mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='Test@1234' FOR CHANNEL 'group_replication_recovery';
#查看复制组插件是否装载
mysql> SHOW PLUGINS;
如果有以下内容则表示已装载
group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | GPL
#启动复制组
mysql> SET GLOBAL group_replication_bootstrap_group=ON; mysql> START GROUP_REPLICATION USER='rpl_user', PASSWORD='Test@1234'; mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
#查看复制组
mysql> SELECT * FROM performance_schema.replication_group_members; +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ | CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ | group_replication_applier | a49b5c8f-fd44-11eb-a9e2-000c29707010 | mgr01 | 3306 | ONLINE | PRIMARY | 8.0.21 | +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ 1 row in set (0.00 sec)
上面是第一台服务器的配置
以下是添加第二台的相关配置
#复制第一台服务器的mysql配置
[root@mgr02 ~]# cd /etc/my.cnf.d/ [root@mgr02 my.cnf.d]# rm -rf mysql-server.cnf [root@mgr02 my.cnf.d]# scp mgr01:/etc/my.cnf.d/mysql-server.cnf .
只需要编辑以下两个相关配置：
server_id=2 group_replication_local_address= "mgr02:33061"
#启动mysql服务器
[root@mgr02 my.cnf.d]# systemctl start mysqld
#连接服务器
[root@mgr02 my.cnf.d]# mysql -uroot -p
#切换数据库
mysql> use mysql;
#创建复制组用户
SET SQL_LOG_BIN=0; CREATE USER rpl_user@'%' IDENTIFIED BY 'Test@1234'; GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%'; GRANT BACKUP_ADMIN ON *.* TO rpl_user@'%'; FLUSH PRIVILEGES; SET SQL_LOG_BIN=1;
#复制用户凭据到复制组通道
mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='Test@1234' FOR CHANNEL 'group_replication_recovery';
#查看复制组插件是否装载
mysql> SHOW PLUGINS;
如果有以下内容则表示已装载
group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | GPL
#启动复制组
mysql> START GROUP_REPLICATION USER='rpl_user', PASSWORD='Test@1234';
#查看复制组
mysql> SELECt * FROM performance_schema.replication_group_members; +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ | CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ | group_replication_applier | a49b5c8f-fd44-11eb-a9e2-000c29707010 | mgr01 | 3306 | ONLINE | PRIMARY | 8.0.21 | | group_replication_applier | a9eed5dc-fd44-11eb-aec2-000c29de2f00 | mgr02 | 3306 | ONLINE | SECONDARY | 8.0.21 | +---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+ 2 rows in set (0.00 sec)
以上是第二台服务器的配置，第三台和第二台服务器的配置是一样的
如果需要停止复制组，则使用：
mysql> stop GROUP_REPLICATION
Redis的编译安装安装Redis
#解压 [root@kittod opt]# pwd /opt [root@kittod opt]# tar xvf redis-6.0.6.tar.gz #编译 [root@kittod opt]# make #如果提示没有make命令，先安装make以及gcc环境 [root@kittod redis-6.0.6]# make -bash: make: command not found [root@kittod redis-6.0.6]# dnf install make gcc tcl -y #如果make提示致命错误，请指定分配器为libc In file included from adlist.c:34: zmalloc.h:50:10: fatal error: jemalloc/jemalloc.h: No such file or directory #include^~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[1]: *** [Makefile:315: adlist.o] Error 1 make[1]: Leaving directory '/redis-6.0.6/src' make: *** [Makefile:6: all] Error 2 [root@kittod redis-6.0.6]# make MALLOC=libc #测试 [root@kittod opt]# make test #安装 [root@kittod opt]# make install #启动服务 [root@kittod opt]# cd src/ [root@kittod opt]# ./redis-server #警告1 #打开文件限制 1672:M 18 Aug 2020 22:04:35.532 * Increased maximum number of open files to 10032 (it was originally set to 1024). #解决方法 [root@kittod src]# vim /etc/security/limits.conf root soft nofile 10032 root hard nofile 10032 #警告2 #TCP监听队列 1672:M 18 Aug 2020 22:04:35.533 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. #解决办法 [root@kittod src]# vim /etc/sysctl.conf net.core.somaxconn= 1024 #警告3 #内存过载 1672:M 18 Aug 2020 22:04:35.533 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. #解决办法 [root@kittod src]# vim /etc/sysctl.conf vm.overcommit_memory = 1 #警告4 #大页支持禁用 1672:M 18 Aug 2020 22:04:35.533 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. #解决办法 [root@kittod src]# vim /etc/rc.local echo never > /sys/kernel/mm/transparent_hugepage/enabled [root@kittod src]# chmod u+x /etc/rc.d/rc.local
启动服务
[root@kittod ~]# cd /opt/redis-6.0.6/src/ [root@kittod src]# ./redis-server 或者是 [root@kittod ~]# cd /opt/redis-6.0.6/src/ [root@kittod ~ ]# ./redis-server /root/redis-6.0.6/redis.conf
务必关闭防火墙或者是使用防火墙策略允许Redis通过
测试使用
[root@kittod src]# ./redis-cli 127.0.0.1:6379> ping PONG 127.0.0.1:6379> set foo bar OK 127.0.0.1:6379> get foo "bar" 127.0.0.1:6379> incr mycounter (integer) 1 127.0.0.1:6379> incr mycounter (integer) 2 127.0.0.1:6379>
Redis 配置
Redis 的配置文件位于 Redis 安装目录下，文件名为 redis.conf 可以通过 CONFIG 命令查看或设置配置项。
127.0.0.1:6379> config get * 1) "rdbchecksum" 2) "yes" 1 2 3 编辑配置 你可以通过修改 redis.conf 文件或使用 CONFIG set 命令来修改配置。 Key的数据结构 Redis key值是二进制安全的，这意味着可以用任何二进制序列作为key值，从形如”foo”的简单字符串到 一个JPEG文件的内容都可以。空字符串也是有效key值。 key的操作 exists key 指定的key是否存在。时间复杂度：O(1)。返回整数1则表示结果存在，返回0，则表示不存在。 set key 设置key-value 3) "daemonize" 4) "no" 。。。 259) "notify-keyspace-events" 260) "" 261) "bind" 262) "" 263) "requirepass" 264) "" 127.0.0.1:6379> config get loglevel 1) "loglevel" 2) "notice"
编辑配置
可以通过修改 redis.conf 文件或使用 CONFIG set 命令来修改配置。
127.0.0.1:6379> config get loglevel 1) "loglevel" 2) "notice" 127.0.0.1:6379> config set loglevel "warning" OK 127.0.0.1:6379> config get loglevel 1) "loglevel" 2) "warning"
