Microsoft Word - HAクラスタ構築手順書.doc

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1 HA

2 OS DRBD DRBD DRDB DRBD hosts drbd.conf DRBD DRBD MySQL Apache heartbeat heartbeat heartbeat ha.cf haresources authkeys DRBD mysqld httpd... 22

3 7.3. heartbeat heartbeat Web

4 1. DRDB heartbeat Linux HA 2. HA 2.1. OS OS Linux CentOS 4.5 Kernel ELsmp 2.2. DRBD heartbeat kernel-devel EL perl-libwww-perl

5 3. HA LAN /24 IPeth /24 eth /24 eth /24 CentOS 4.5 lemon.araboth.local (heartbeat) (DRBD) DRBD eth /24 eth /24 CentOS 4.5 orange.araboth.local (heartbeat) (DRBD) heartbeat eth /8 eth /8 LAN /8 lemon.araboth.local orange.araboth.local eth / /24 eth1(drbd) / /24 eth2(heartbeat) / /8

6 4. DRBD DRBD 4.1. DRBD DRBD yum # yum y install drbd # yum y install kmod-drdb-smp 4.2. DRDB DRDB IDE SCSI DRDB SCSI 2 /dev/sdb IDE IDE fdisk # fdisk /dev/sdb No. 1 /dev/sdb1 2 /dev/sdb2 DRDB Linux 365P

7 MB 4.3.DRBD DRBD hosts DNS hosts # Do not remove the following line, or various programs # that require network functionality will fail lemon.araboth.local lemon localhost.localdomain localhost orange.araboth.local orange # Do not remove the following line, or various programs # that require network functionality will fail orange.araboth.local orange localhost.localdomain localhost lemon.araboth.local lemon

8 DRBD /etc/drbd.conf/ No. 1 drbd.conf /usr/share/doc/drbd /drbd.conf /etc/drbd.conf drbd.conf resource r0 { protocol C; incon-degr-cmd "echo '!DRBD! pri on incon-degr' wall ; sleep 60 ; halt -f"; startup { degr-wfc-timeout 120; } # 2 minutes. disk { on-io-error } panic; syncer { rate 10M; group 1; al-extents 257; } on lemon.araboth.local { device /dev/drbd0; disk /dev/sdb2; address :7788; meta-disk /dev/sdb1[0];

9 } } on orange.araboth.local { device /dev/drbd0; disk /dev/sdb2; address :7788; meta-disk /dev/sdb1[0]; }

10 4.4. DRBD DRBD # service drbd start DRBD yes # service drbd start Starting DRBD resources: [ d0 s0 n0 ].... *************************************************************** DRBD's startup script waits for the peer node(s) to appear. - In case this node was already a degraded cluster before the reboot the timeout is 120 seconds. [degr-wfc-timeout] - If the peer was available before the reboot the timeout will expire after 0 seconds. [wfc-timeout] (These values are for resource 'r0'; 0 sec -> wait forever) To abort waiting enter 'yes' [ 25]:

11 4.5. DRBD DRBD /proc/drbd Secondary (st Secondary ) 4.6. DRBD Primary/Secondary (cs) SyncTarget Connected Consistent # drbdadm -- --do-what-i-say primary all # cat /proc/drbd version: (api:79/proto:74) SVN Revision: 2875 build by buildcentos@build-i386, :30:50 0: cs:wfconnection st:primary/secondary ld:consistent ns:0 nr:0 dw:0 dr:0 al:0 bm:1008 lo:0 pe:0 ua:0 ap:0 1: cs:unconfigured

12 4.7. DRBD ( ext3 ) # mkfs.ext3 /dev/drbd0 /data # mkdir /data # mount /dev/drbd0 /data

13 4.8. # touch /data/test /dev/drbd0 fuser fuser km /data # umount /dev/drbd0 # drbdadm secondary r0 # drbdadm -- --do-what-i-say primary all # mount /dev/drbd0 /data

14 5. MySQL MySQL DRBD MySQL DRBD 5.1. MySQL my.cnf datadir [mysqld] datadir=/data/mysql socket=/var/lib/mysql/mysql.sock # Default to using old password format for compatibility with mysql 3.x # clients (those using the mysqlclient10 compatibility package). old_passwords=1 [mysql.server] user=mysql basedir=/var/lib [mysqld_safe] err-log=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid MySQL

15 6. Apache Apache DRBD Apache 6.1. Apache httpd.conf DocumentRoot DocumentRoot /data/www/html WebObujects apache.conf ScriptAlias

16 7. heartbeat 7.1.heartbeat # yum y install heartbeat 7.2.heartbeat haresources authkeys heartbeat /etc/ha.d/ No. 1 ha.cf /usr/share/doc/heartbeat2.1.2/ha.cf /etc/ha.d/ha.cf 2 haresources /usr/share/doc/heartbeat2.1.2/haresources /etc/ha.d/haresources 3 authkeys /usr/share/doc/heartbeat2.1.2/authkeys /etc/ha.d/authkeys

17 ha.cf ha.cf 1 ha.cf debugfile /var/log/ha-debug logfile /var/log/ha-log logfacility local0 keepalive 2 deadtime 30 warntime 10 initdead 120 udpport 694 baud ucast eth auto_failback on watchdog /dev/watchdog node lemon.araboth.local orange.araboth.local ping respawn hacluster /usr/lib/heartbeat/ipfail apiauth ipfail gid=haclient uid=hacluster

18 2 ha.cf debugfile /var/log/ha-debug logfile /var/log/ha-log logfacility local0 keepalive 2 deadtime 30 warntime 10 initdead 120 udpport 694 baud auto_failback on watchdog /dev/watchdog node lemon.araboth.local orange.araboth.local ping

19 haresources haresources lemon.araboth.local IPaddr:: /24/eth0 drbddisk Filesystem::/dev/drbd0::/data::ext3 mysqld httpd lemon.araboth.local IP heartbeat IP httpd mysqld heartbeat httpd mysqld httpd mysqld # chkconfig del httpd # chkconfig del mysqld

20 authkeys CRC /etc/ha.d/authkeys 600 auth 1 1 crc DRBD Linux P drbd-wait heartbeart drbd-wait /root/drbd-wait # cp /root/drbd-wait /etc/init.d/ # chmod +x /etc/init.d/drbd-wait # chkconfig ---del drbd # chkconfig -add drbd # chkconfig drbd on # chkconfig del drbd-wait # chkconfig add drbd-wait # chkconfig drbd-wait on # chkconfig del heartbeat # chkconfig add heartbeat # chkconfig on heartbeat

21 httpd mysqld /etc/ha.d/ha.cf /etc/ha.d/ha.cf 3 (lemon.araboth.local) ha.cf respawn root /usr/local/cluster/check_primary 4 (orange.araboth.local) ha.cf respawn root /usr/local/cluster/check_secondary check_primary check_secondary httpchk.pl /usr/local/cluster /root 1 # mkdir /usr/local/cluster # cp /root/check_primary /usr/local/cluster # cp /root/httpchk.pl /usr/local/cluster # chmod +x /usr/local/cluster/check_primary # chmod +x /usr/local/cluster/httpchk.pl 2 # mkdir /usr/local/cluster # cp /root/check_primary /usr/local/cluster # cp /root/httpchk.pl /usr/local/cluster # chmod +x /usr/local/cluster/check_secondary # chmod +x /usr/local/cluster/httpchk.pl

22 (check_primary check_secondary) No. 1 INITWAIT ( ) 2 INTERVAL ( ) 3 RETRYCOUNT 4 RETRYINTERVAL ( ) 5 CVIP IP 6 MYSQL_USER mysqld ( ) 7 MYSQL_PASSWORD MYSQL_USER 8 HTTP_CHECK_SCRIPT http Perl 9 HTTP_CHECK_URL http URL mysqld mysqld is alive mysqld # mysqladmin u root password password PING 2> /dev/null httpd httpchk.pl HTTP_CHECK_URL URL 200 httpd

23 7.3.heartbeat heartbeat httpd mysqld heartbeat # service heartbeat start heartbeat httpd mysqld heartbeat heartbeat httpd mysqld heartbeat httpd mysqld

24 7.4.heartbeat httpd mysqld heartbeat mysqld (service mysql stop) heartbeat (service heartbeat start) httpd heartbeat (service heartbeat start) httpd mysqld httpd mysqld httpd mysqld IP IP ifconfig -a heartbeat httpd mysqld httpd mysqld IP

25 8. Web 8.1. Linux HA 8.2.Web %2FDRBD EUC-JP LF init-wait check_primary check_secondary httpchk.pl

100123SLES11HA.pptx

100123SLES11HA.pptx SLES11 Xen +HA CEO miyahara@virtualtech.jp VirtualTech Japan Inc. VTJ 2006 12 14,250,000 1-1-10 CEO CTO 8 5.5 URL http://virtualtech.jp/ 2 1 P2V Xen 3 High Availability Extension SUSE Linux Enterprise