On Thu, Feb 11, 2010 at 4:07 PM, Glauber Cabral <glauber...@gmail.com> wrote: > Hi people. > I've been reading about cluster for some time and trying to configure > a 2-node cluster with shared storage. > I've already used the IRC channel, but these questions were to big to > ask there and I though the list should be a better place to make these > questions. > I would appreciate a lot if you can help me. > > I've created the configuration showed in the end of this message. > I've still not included STONITH and I'm not sure if this is causing problems. > I think the cluster behavior should be like this: > OCFS2: partition with database files and some files that tomcat will > access ( the application guarantees that a file will not be accessed > by both tomcat instances, at least to our needs at the moment). > Mysql: only one node running and accessing datadir inside the shared storage. > Tomcat: both nodes running tomcat and accessing mysql by a virtual IP > apache: will run only on one node and will load balance connections to > both tomcats by ajp protocol. > tomcat needs to start after mysql and filesystem > apache will start after tomcat (but I'm not sure if it's necessary) > > The first question if about mysql. It's running only on one node at a > time,
You cloned it though, so it thinks it should be able to run more than once. > but the logfile has a warn message showing that the other mysqld > process cannot run anywehere. I'm not sure if this warn is correct or > if I did something wrong configuring mysql service. Should it be > configured as master/slave? If they're supposed to run on both hosts with one of them r/o and syncing from the other, yes. > I didn't understand this correctly because > all the tutorials I've found use DRDB and not a shared partition. > > Another question is about migrating apache from one node to other. > When I migrate apache, the tomcat service is restarted and I guess it > shouldn't be. > I think it's being restarted because of the colocation rule. Is this > correct? Should I remove that rule? Probably not. You should create a hb_report for that. > > The third question. I tried to shutdown a node by powering it off, and > the services didn't turned on in the other node. Does it occurred > because I don't have STONITH configured? No, its because they're already there. You cloned them all, they're always running there. Although OCFS2 with no STONITH is insanely dangerous. > I know there are few > information here to answer this question, but I just want to have > ideas about what kind of error I must look for. > > Thank you in advance for any suggestions and help. > Cheers, > Glauber > > The crm configuration: > > node erytheia > node panopea > primitive apache ocf:heartbeat:apache \ > params configfile="/etc/httpd/conf/httpd.conf" \ > op monitor interval="1min" \ > meta target-role="Started" is-managed="true" > primitive dlm ocf:pacemaker:controld \ > op monitor interval="120s" > primitive fs ocf:heartbeat:Filesystem \ > params device="/dev/xvdb1" directory="/tidia" fstype="ocfs2" \ > op monitor interval="120s" > primitive ip ocf:heartbeat:IPaddr2 \ > params ip="143.106.157.26" cidr_netmask="25" \ > op monitor interval="30s" > primitive ip_mysql ocf:heartbeat:IPaddr2 \ > params ip="192.168.128.10" cidr_netmask="25" \ > op monitor interval="30s" timeout="30s" start-delay="0" depth="0" > primitive mysqld ocf:heartbeat:mysql \ > params binary="/usr/bin/mysqld_safe" > datadir="/tidia/mysql/datadir" pid="/home/sakai/mysql/mysqld.pid" > socket="/home/sakai/mysql/mysqld.sock" > log="/home/sakai/mysql/mysqld.log" user="sakai" group="tidia" \ > meta target-role="Started" \ > op monitor interval="120s" > primitive o2cb ocf:ocfs2:o2cb \ > op monitor interval="120s" > primitive tomcat ocf:heartbeat:tomcat \ > params statusurl="http://127.0.0.1:8080"; > java_home="/usr/java/jdk1.5.0_22" tomcat_name="tomcat" > tomcat_user="sakai" tomcat_stop_timeout="120" > tomcat_start_opts="-server -Xms512m -Xmx1024m -XX:+UseParallelGC > -XX:PermSize=256m -XX:MaxPermSize=512m -XX:NewSize=256m > -XX:MaxNewSize=486m -Djava.awt.headless=true -Duser.language=pt > -Duser.region=BR -Dsakai.demo=false" > catalina_home="/usr/lib/apache-tomcat-5.5.23" > catalina_pid="/usr/lib/apache-tomcat-5.5.23/logs/catalina.pid" > catalina_opts="-Xmx512M -XX:MaxPermSize=256M > -Duser.timezone=America/Sao_Paulo -Duser.language=pt -Duser.region=BR" > \ > op start interval="0" timeout="240s" \ > op stop interval="0" timeout="240s" \ > op status interval="0" timeout="60s" \ > op monitor interval="10s" timeout="30s" start-delay="0" depth="0" \ > meta target-role="Started" > clone dlm-clone dlm \ > meta globally-unique="false" interleave="true" target-role="Started" > clone fs-clone fs \ > meta interleave="true" ordered="true" target-role="Started" > clone mysql-clone mysqld \ > meta interleave="true" target-role="Started" > clone o2cb-clone o2cb \ > meta globally-unique="false" interleave="true" target-role="Started" > clone tomcat-clone tomcat \ > meta ordered="false" interleave="true" globally-unique="false" > is-managed="true" > location cli-prefer-apache apache \ > rule $id="cli-prefer-rule-apache" inf: #uname eq erytheia > location cli-prefer-ip ip \ > rule $id="cli-prefer-rule-ip" inf: #uname eq erytheia > location cli-prefer-mysql-clone mysql-clone \ > rule $id="cli-prefer-rule-mysql-clone" inf: #uname eq erytheia > colocation apache-with-ip inf: apache ip > colocation fs-with-o2cb inf: fs-clone o2cb-clone > colocation mysql_with_fs inf: mysql-clone fs-clone > colocation mysql_with_ip_mysql inf: mysql-clone ip_mysql > colocation o2cb-with-dlm inf: o2cb-clone dlm-clone > colocation tomcat_with_fs inf: tomcat-clone fs-clone > order start-apache-after-ip inf: ip apache > order start-fs-after-o2cb inf: o2cb-clone fs-clone > order start-o2cb-after-dlm inf: dlm-clone o2cb-clone > order start_mysql_after_fs inf: fs-clone mysql-clone > order start_mysql_after_ip_mysql inf: ip_mysql mysql-clone > order start_tomcat_after_fs inf: fs-clone tomcat-clone > order start_tomcat_after_ip inf: ip tomcat-clone > order start_tomcat_before_apache inf: tomcat-clone apache > property $id="cib-bootstrap-options" \ > last-lrm-refresh="1265892279" \ > expected-quorum-votes="2" \ > dc-version="1.0.5-ee19d8e83c2a5d45988f1cee36d334a631d84fc7" \ > cluster-infrastructure="openais" \ > stonith-enabled="false" \ > no-quorum-policy="ignore" > rsc_defaults $id="rsc-options" \ > resource-stickiness="100" > > _______________________________________________ > Pacemaker mailing list > Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
