# mysql 기반의 리플리케이션 및 mmm 설치 안녕하세요, 고니입니다. 기존에 작성된 문서 Refactoring 중이라 업데이트 하하려고 합니다.
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### MYSQL 설치 1. 설치환경 구성1. Mysql사용자정보 추가 ```Python [root@localhost ~]# groupadd –g 1002 mysql [root@localhost ~]# useradd -M mysql -u 1002 –g 1002 -d /svc/mysql/ ```
1. 추가 패키지 설치 ```Python [root@localhost ~]# yum install ncurses* openssl-devel* \ gdbm-devel* curl* gmp* libxml2* libtermcap* cmake* libc-client-devel\ libcurl-devel libxslt -y ``` 2. 바이너리&환경설정 설치패키지&환경설정 다운로드 ```Python [root@localhost ~]# tar -zxf mysql-5.6.34-linux-glibc2.5-x86_64.tar.gz [root@localhost ~]# mv mysql-5.6.34-linux-glibc2.5-x86_64 /svc/mysql [root@localhost ~]# mv -f my.cnf /etc/my.cnf [root@localhost ~]# cp /svc/mysql/ [root@localhost ~]# ./scripts/mysql_install_db --user=mysql --datadir=/svc/db_data/ [root@localhost ~]# chown -R root: /svc/mysql/ [root@localhost ~]# chown -R mysql: /svc/db_data/ [root@localhost ~]# cp support-files/mysql.server /etc/init.d/mysqld [root@localhost ~]# chmod +x /etc/init.d/mysqld ``` 3. 서비스 등록 및 실행 ```Python [root@localhost ~]# /etc/init.d/mysqld start Starting mysqld: [ OK ] ```
2. MYSQL 이중화 구성1. 서버 ID설정 (Active/Standby 모두 설정) ```Python [root@localhost ~]# vi /etc/my.cnf … server-id = 1 (Active는 1, Standby는 2로 설정) ```
1. 리플리케이션 권한 설정서버 리플리케이션 설정 (Active/Standby 모두 설정) ```SQL mysql> grant replication slave on . to 'repl'@'상대방DB_IP' identified by 'repl'; mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) ``` 2. 액티브 서버에서 수행 ```SQL mysql> show master status \G; 1. row *************************** File: binlog.000004 Position: 722 Binlog_Do_DB: Binlog_Ignore_DB: Executed_Gtid_Set: 1 row in set (0.00 sec) ERROR: No query specified ``` 3. 스탠바이서버에서 수행 ```SQL mysql> change master to master_host='상대방DB_IP', master_user='repl', master_password='repl', master_log_file='binlog.000004', master_log_pos=722; Query OK, 0 rows affected, 2 warnings (0.02 sec) ``` 4. 리플리케이션 연동 (각 DB서버에서 수행) ```SQL mysql> start slave; Query OK, 0 rows affected (0.00 sec) ``` 5. Standby 시작 및 상태 확인 (Active/Standby 모두 설정) ```SQL mysql> show slave status \G; *************************** 1. row ***************************                Slave_IO_State: Waiting for master to send event                   Master_Host: 상대방DB_IP                   Master_User: repl                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: binlog.000004           Read_Master_Log_Pos: 722                Relay_Log_File: relay-bin.000007                 Relay_Log_Pos: 280         Relay_Master_Log_File: binlog.000005              Slave_IO_Running: Yes             Slave_SQL_Running: Yes               Replicate_Do_DB:           Replicate_Ignore_DB:            Replicate_Do_Table:        Replicate_Ignore_Table:       Replicate_Wild_Do_Table:   Replicate_Wild_Ignore_Table:                    Last_Errno: 0                    Last_Error:                  Skip_Counter: 0           Exec_Master_Log_Pos: 120               Relay_Log_Space: 607               Until_Condition: None                Until_Log_File:                 Until_Log_Pos: 0            Master_SSL_Allowed: No            Master_SSL_CA_File:            Master_SSL_CA_Path:               Master_SSL_Cert:             Master_SSL_Cipher:                Master_SSL_Key:         Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No                 Last_IO_Errno: 0                 Last_IO_Error:                Last_SQL_Errno: 0                Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 1                   Master_UUID: 2667fd34-0483-11e7-b59d-525400a0f91d              Master_Info_File: /svc/db_data/master.info                     SQL_Delay: 0           SQL_Remaining_Delay: NULL       Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it            Master_Retry_Count: 86400                   Master_Bind:       Last_IO_Error_Timestamp:      Last_SQL_Error_Timestamp:                Master_SSL_Crl:            Master_SSL_Crlpath:            Retrieved_Gtid_Set:             Executed_Gtid_Set:                 Auto_Position: 0 1 row in set (0.00 sec) ERROR: No query specified ```
### Mysql-MMM 설치하기 1. Mysql-MMM구성도 2. MMM(Multi-Master Replication Manager for MySQL)은 리플리케이션으로 DB데이터를 이중화했을때, 각 DBMS별로 상태 확인하여 ReadWrite, Readonly VIP를 관리하기 위한 오픈소스 3. 서버별 설치 Component
**대상서버** **Component** **역 할**
svcdb/dashboard\_dbMysql, mmm-agentMysql, 데이터 동기화, mmm 상태확인
db monitormmm-monitor각 Agent별 Healthcheck, VIP 관리
4. MMM접근 설정 (DB서버) ```SQL mysql> grant process,super,replication client on . to 'agent'@'자신IP' identified by 'agent'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) ``` 5. MMM-agent 설치 (DB서버)모니터 접근 허용하기 (DB서버) ```SQL mysql> GRANT REPLICATION CLIENT ON . TO 'monitor'@'MONITOR서버IP' IDENTIFIED BY 'monitor'; 1 row in set (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) ```
### MMM agent 설치 1. 설치에 필요한 패키지 1. mysql-mmm-2.2.1-2.el6.noarch.rpm 2. mysql-mmm-agent-2.2.1-2.el6.noarch.rpm 3. mysql-mmm-tools-2.2.1-2.el6.noarch.rpm OS환경에 따라 종속된 패키지가 필요할 수 있음. 종속된 패키지는 perl관련 패키지가 설치되어 있어야 함. 2. mmm-agent설치 ```Python [root@localhost ~]# yum install –y mysql-mmm-2.2.1-2.el6.noarch.rpm [root@localhost ~]# yum install –y mysql-mmm-agent-2.2.1-2.el6.noarch.rpm [root@localhost ~]# yum install –y mysql-mmm-tools-2.2.1-2.el6.noarch.rpm ``` 3. mmm-common.conf 설정 ```Python $> vi /etc/mysql-mmm/mmm_common.conf active_master_role writer cluster_interface bond0  #서버NIC 인터페이스 기재 pid_path /var/run/mysql-mmm/mmm_agentd.pid bin_path /usr/libexec/mysql-mmm/ replication_user repl #리플리케이션 사용자 입력 replication_password repl #리플리케이션 사용자 패스워드 agent_user agent #mmm을 통해 DBMS로 접근할 사용자 입력 agent_password agentpass #패스워드 입력 ip Mater 서버IP mode master peer db2 ip Standby 서버IP mode master peer db1 hosts db1, db2 ips DB VIP mode exclusive ``` 4. mmm - mmm\_agent.conf 설정 ```Python $> vi /etc/mysql-mmm/mmm_agent.conf include mmm_common.conf # The 'this' variable refers to this server. Proper operation requires # that 'this' server (db1 by default), as well as all other servers, have the # proper IP addresses set in mmm_common.conf. this db1 # Active는 db1, Standby는 db2로 기재 ``` 5. mmm-agent 서비스 실행 후 프로세스 상태 확인 ```Python [root@localhost ~]# /etc/init.d/mysql-mmm-agent start Starting mmm_agentd: [ OK ] [root@localhost ~]# ps -ef | grep mmm root 8052 8031 0 10:12 pts/0 00:00:00 grep mmm root 18251 1 0 2016 ? 00:00:00 mmm_agentd root 18253 18251 0 2016 ? 04:03:18 mmm_agentd ``` ### MMM-monitor 설치 (Satistics#2 서버) 1. 설치에 필요한 패키지 1. mysql-mmm-2.2.1-2.el6.noarch.rpm 2. mysql-mmm-monitor-2.2.1-2.el6.noarch.rpm 3. mysql-mmm-tools-2.2.1-2.el6.noarch.rpm OS환경에 따라 종속된 패키지가 필요할 수 있음. 종속된 패키지는 perl관련 패키지가 설치되어 있어야 함. 2. svcdb용 MMM 설정 ```Python $> vi /etc/mysql-mmm/mmm_common_svcdb.conf active_master_role writer cluster_interface bond0  서버NIC 인터페이스 기재 pid_path /var/run/mysql-mmm/mmm_agentd_svcdb.pid bin_path /usr/libexec/mysql-mmm/ replication_user repl  리플리케이션 사용자 입력 replication_password repl  리플리케이션 사용자 패스워드 agent_user agent  mmm을 통해 DBMS로 접근할 사용자 입력 agent_password agentpass  패스워드 입력 ip svcdb Mater 서버IP mode master peer db2 ip svcdb Standby 서버IP mode master peer db1 hosts db1, db2 ips svcdb VIP mode exclusive $> vi /etc/mysql-mmm/mmm_mon_svcdb.conf include mmm_common_svcdb.conf ip 127.0.0.1 pid_path /var/run/mysql-mmm/mmm_mond_svcdb.pid bin_path /usr/libexec/mysql-mmm status_path /var/lib/mysql-mmm/mmm_mond_svcdb.status ping_ips svcdb RIP  IP는 콤마(,)로 구분 auto_set_online 60 port 9991 monitor_user mmm_monitor  mmm 접근 사용자 monitor_password monitorpw  mmm 패스워드정보 debug 0 $> vi /etc/mysql-mmm/mmm_mon_log_svcdb.conf log4perl.logger = INFO, MMMLog log4perl.appender.MMMLog = Log::Log4perl::Appender::File log4perl.appender.MMMLog.Threshold = INFO log4perl.appender.MMMLog.filename = /var/log/mysql-mmm/mmm_mond_svcdb.log log4perl.appender.MMMLog.recreate = 1 log4perl.appender.MMMLog.layout = PatternLayout log4perl.appender.MMMLog.layout.ConversionPattern = %d %5p %m%n ``` 3. 서비스 등록
1. init.d스크립트 복사 ```Python [root@localhost ~]# cp /etc/init.d/mysql-mmm-monitor /etc/init.d/mysql-mmm-svcdb ```
2. 스크립트 수정 ```Python $> vi /etc/init.d/mysql-mmm-svcdb #!/bin/sh # # mysql-mmm-monitor  This shell script takes care of starting and stopping #                    the mmm monitoring daemon. # # chkconfig: - 64 36 # description:  MMM Monitor. # processname: mmm_mond # config: /etc/mysql-mmm/mmm_mon.conf # pidfile: /var/run/mysql-mmm/mmm_mond.pid # Source function library and defaults file. . /etc/rc.d/init.d/functions . /etc/default/mysql-mmm-monitor # Cluster name (it can be empty for default cases) CLUSTER='svcdb' LOCKFILE='/var/lock/subsys/mysql-mmm-monitor' prog='MMM Monitor Daemon' if [ "$CLUSTER" != "" ]; then        MMMD_MON_BIN="/usr/sbin/mmm_mond @$CLUSTER" MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond_$CLUSTER.pid" else        MMMD_MON_BIN="/usr/sbin/mmm_mond"        MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond.pid" Fi ```
4. dashboard\_db MMM설정 ```Python $> vi /etc/mysql-mmm/mmm_common_dashboard_db.conf active_master_role writer cluster_interface bond0  서버NIC 인터페이스 기재 pid_path /var/run/mysql-mmm/mmm_agentd-cssatdb.pid bin_path /usr/libexec/mysql-mmm/ replication_user repl  리플리케이션 사용자 입력 replication_password repl  리플리케이션 사용자 패스워드 agent_user agent  mmm을 통해 DBMS로 접근할 사용자 입력 agent_password agentpass  패스워드 입력 ip dashboard_db Mater 서버IP mode master peer db2 ip dashboard_db Standby 서버IP mode master peer db1 hosts db1, db2 ips dashboard_db VIP mode exclusive $> vi  /etc/mysql-mmm/mmm_mon_dashboard_db.conf include mmm_common_dashboard_db.conf ip 127.0.0.1 pid_path /var/run/mysql-mmm/mmm_mond_dashboard_db.pid bin_path /usr/libexec/mysql-mmm status_path /var/lib/mysql-mmm/mmm_mond_dashboard_db.status ping_ips dashboard_db RIP입력  IP는 콤마(,)로 구분 auto_set_online 60 port 9990 monitor_user mmm_monitor  mmm 접근 사용자 monitor_password monitorpw  mmm 패스워드정보 debug 0 $> vi /etc/mysql-mmm/mmm_mon_log_dashboard_db.conf log4perl.logger = INFO, MMMLog log4perl.appender.MMMLog = Log::Log4perl::Appender::File log4perl.appender.MMMLog.Threshold = INFO log4perl.appender.MMMLog.filename = /var/log/mysql-mmm/mmm_mond_dashboard_db.log log4perl.appender.MMMLog.recreate = 1 log4perl.appender.MMMLog.layout = PatternLayout log4perl.appender.MMMLog.layout.ConversionPattern = %d %5p %m%n ```
1. 서비스 등록 2. init.d스크립트 복사 ```Python [root@localhost ~]# cp /etc/init.d/mysql-mmm-monitor /etc/init.d/mysql-mmm-dashboard_db ```
5. init.d스크립트 내용변경 ```Python %> vi /etc/init.d/mysql-mmm-dashboard_db #!/bin/sh mysql-mmm-monitor This shell script takes care of starting and stopping the mmm monitoring daemon. chkconfig: - 64 36 description: MMM Monitor. processname: mmm_mond config: /etc/mysql-mmm/mmm_mon.conf pidfile: /var/run/mysql-mmm/mmm_mond.pid Source function library and defaults file. . /etc/rc.d/init.d/functions . /etc/default/mysql-mmm-monitor Cluster name (it can be empty for default cases) CLUSTER='dashboard_db' LOCKFILE='/var/lock/subsys/mysql-mmm-monitor' prog='MMM Monitor Daemon' if [ "$CLUSTER" != "" ]; then MMMD_MON_BIN="/usr/sbin/mmm_mond @$CLUSTER" MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond_$CLUSTER.pid" else MMMD_MON_BIN="/usr/sbin/mmm_mond" MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond.pid" fi ``` 6. Centos7 환경에서MMM-monitor등록 7. systemctl 서비스 생성 및 등록 ```Python [root@localhost ~]# cd /usr/lib/systemd/system [root@localhost system]# cp mysql-mmm-monitor.service mysql-mmm-monitor_svcdb.service [root@localhost system]# cp mysql-mmm-monitor.service mysql-mmm-monitor_dashboard_db.service [root@localhost system]# systemctl enable mysql-mmm-monitor_svcdb.service [root@localhost system]# systemctl enable mysql-mmm-monitor_dashboard_db.service $> vi /usr/lib/systemd/system/ mysql-mmm-monitor_svcdb.service [Unit] Description=MySQL MMM Monitor After=network.target mysqld.service [Service] Type=forking PIDFile=/var/run/mmm_mond_svcdb.pid ExecStart=/etc/init.d/mysql-mmm-monitor-svcdb start ExecStop=/etc/init.d/mysql-mmm-monitor-svcdb stop PrivateTmp=true [Install] WantedBy=multi-user.target $> vi /usr/lib/systemd/system/ mysql-mmm-monitor_dashboard_db.service [Unit] Description=MySQL MMM Monitor After=network.target mysqld.service [Service] Type=forking PIDFile=/var/run/mmm_mond_svcdb.pid ExecStart=/etc/init.d/mysql-mmm-monitor-dashboard_db start ExecStop=/etc/init.d/mysql-mmm-monitor-dashboard_db stop PrivateTmp=true [Install] WantedBy=multi-user.target ``` 8. 서비스 실행
1. MMM-monitor 서비스 실행 (monitor서버에서 실행) ```Python [root@localhost ~]# /etc/init.d/mysql-mmm-svcdb start Starting mmm_mond: [ OK ] [root@localhost ~]# /etc/init.d/mysql-mmm-dashboard_db start Starting mmm_mond: [ OK ] ``` 2. Mysql 프로세스 실행 상태 확인서비스 상태 확인 (db서버에서 실행) ```Python [root@localhost ~]# ps –ef | grep mysql root 6714 1 0 Jan08 ? 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/home/mysqldata --pid-file=/home/mysqldata/localhost.pid mysql 7856 6714 0 Jan08 ? 00:26:50 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/home/mysqldata --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/home/mysqldata/error.log --open-files-limit=8192 --pid-file=/home/mysqldata/localhost.pid --socket=/tmp/mysql.sock --port=3306 ``` 3. Mysql 쿼리 처리여부 확인 ```Python [root@localhost ~]# mysql -u root -p'root패스워드' -e'select now()' 2017-03-12 19:06:14 ``` 4. Mmm 프로세스상태 확인 ```Python [root@localhost ~]# ps -ef | grep mmm root 10832 1 0 Mar07 ? 00:00:00 mmm_mond-dashboard_db root 10834 10832 0 Mar07 ? 00:04:27 mmm_mond-dashboard_db root 10843 10834 0 Mar07 ? 00:01:49 perl /usr/libexec/mysql-mmm/monitor/checker @dashboard_db ping_ip root 10846 10834 0 Mar07 ? 00:01:03 perl /usr/libexec/mysql-mmm/monitor/checker @dashboard_db mysql root 10848 10834 0 Mar07 ? 00:00:35 perl /usr/libexec/mysql-mmm/monitor/checker @dashboard_db ping root 10850 10834 0 Mar07 ? 00:01:29 perl /usr/libexec/mysql-mmm/monitor/checker @dashboard_db rep_backlog root 10852 10834 0 Mar07 ? 00:01:28 perl /usr/libexec/mysql-mmm/monitor/checker @dashboard_db rep_threads root 10960 1 0 Mar07 ? 00:00:00 mmm_mond-svcdb root 10962 10960 0 Mar07 ? 00:04:23 mmm_mond-svcdb root 10969 10962 0 Mar07 ? 00:01:47 perl /usr/libexec/mysql-mmm/monitor/checker @svcdb ping_ip root 10972 10962 0 Mar07 ? 00:01:03 perl /usr/libexec/mysql-mmm/monitor/checker @svcdb mysql root 10974 10962 0 Mar07 ? 00:00:35 perl /usr/libexec/mysql-mmm/monitor/checker @svcdb ping root 10976 10962 0 Mar07 ? 00:01:27 perl /usr/libexec/mysql-mmm/monitor/checker @svcdb rep_backlog root 10978 10962 0 Mar07 ? 00:01:27 perl /usr/libexec/mysql-mmm/monitor/checker @svcdb rep_threads root 29560 27996 0 21:40 pts/3 00:00:00 grep mmm ``` 5. MMM 이중화 상태 확인 (dashboard\_db) ```Python [root@localhost ~]# mmm_control @dashboard_db show db1(192.168.67.230) master/ONLINE. Roles: writer(192.168.67.229) db2(192.168.67.231) master/ONLINE. Roles: ``` 6. MMM 이중화 상태 확인 (svcdb) ```Python [root@localhost ~]# mmm_control @svcdb show db1(192.168.67.224) master/ONLINE. Roles: writer(192.168.67.223) db2(192.168.67.225) master/ONLINE. Roles: ``` 7. DBMS별 상태 확인 (svcdb) ```Python [root@localhost ~]# mmm_control @svcdb checks all db2 ping [last change: 2017/03/09 11:03:42] OK db2 mysql [last change: 2017/03/09 11:03:42] OK db2 rep_threads [last change: 2017/03/09 11:03:42] OK db2 rep_backlog [last change: 2017/03/09 06:02:35] OK: Backlog is null db1 ping [last change: 2017/03/09 11:03:42] OK db1 mysql [last change: 2017/03/09 11:03:42] OK db1 rep_threads [last change: 2017/03/09 11:03:42] OK db1 rep_backlog [last change: 2017/03/09 11:03:42] OK: Backlog is null ``` 8. DBMS별 상태 확인 (dashboard\_db) ```Python [root@localhost ~]# mmm_control @dashboard_db checks all db2 ping [last change: 2017/03/09 10:58:37] OK db2 mysql [last change: 2017/03/09 10:58:37] OK db2 rep_threads [last change: 2017/03/09 10:58:37] OK db2 rep_backlog [last change: 2017/03/09 10:58:37] OK: Backlog is null db1 ping [last change: 2017/03/09 10:58:37] OK db1 mysql [last change: 2017/03/09 10:58:37] OK db1 rep_threads [last change: 2017/03/09 10:58:37] OK db1 rep_backlog [last change: 2017/03/09 10:58:37] OK: Backlog is null ```
### FAQ 1. 설치 과정의 오류
**현상**rpm설치시 아래내용으로 메시지 출력후 설치 실패 \[root@localhost ~\]# rpm -Uvh 123.rpm warning: 123.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY error: Failed dependencies: perl(Log::Log4perl) is needed by mysql-mmm-2.2.1-2.el6.noarch
**원인**MMM 설치시 종속된 패키지 설치 실패
**확인사항**perl-Proc-Daemon, perl-Proc-ProcessTable, perl-Log, perl-Mail 패키시 설치여부 확인
**조치방안**관련된 전체 패키지 내려받은 후 설치작업 수행
2. MMM-monitor 서비스 구동 실패현상
**현상**설치 및 설정완료후 서비스 구동시 구동불가 \[root@localhost ~\]# /etc/init.d/mysql-mmm-dashboard\_db-monitor start Starting MMM Monitor Daemon: Configuration file /etc/mysql-mmm/mmm\_mon\_dashboard\_db.conf is world readable! at /usr/share/perl5/vendor\_perl/MMM/Common/Config.pm line 132 \[실패\]
**원인**Mmm config의 권한 설정의 오류
**확인사항**/etc/mysql-mmm/ 경로에 있는 config파일의 퍼미션 확인
**조치방안**전체 퍼미션을 640으로 설정 수행 Chmod 640 /etc/mysql-mmm/\*.conf
3. VIP할당 실패
**현상**Mmm 서비스 구동 후 IP할당불가
**원인**monitor에서 mysql로 접근하는 권한이 오류가 있어 mysql상태체크 불가
**확인사항**/var/log/mysql-mmm/mmm-agent.log에서 Can't connect to MySQL sever 문자열 존재여부 확인
**조치방안**Mysql 접근권한 설정
4. MMM 리소스 확인시 중복출력
**현상**mmm\_config를 통해 DBMS별 상태 확인 불가
**원인**Group별 생성되는 포트를 생성하지 않는 경우 발생
**확인사항**/etc/mysql-mmm/mmm\_mon\_svcdb.conf, /etc/mysql-mmm/mmm\_mon\_svcdb.conf 파일안에 port항목이 기재되어 있고, 각각 다른 포트를 사용하는지 확인
**조치방안**dbms별 포트 설정
5. Centos7에서 mmm\_monitor cluster 구성실패
**현상**Systemctl을 이용한 mysql-monitor 서비스 작동 실패
**원인**Systemctl을 이용한 mmm-monitor실행은 cluster모드를 지원하지 않음
**확인사항**Systemctl 구문안에 ExecStart / ExecStop 구문의 명령어 확인 /etc/init.d/mysql-mmm-monitor- 파일이 있는지 확인
**조치방안**설정파일 및 서비스 구동 명령어 확인