[ClusterLabs] Adding Tomcat as a resource to a Cluster on CentOS 7

Wed Jan 3 05:20:54 EST 2018

On 03/01/18 10:13 +0000, Sean Beeson wrote:
>Hi, Oyvind.
>
>Creating a unit file named tomcat at tomcat.service resolved my issue of
>Tomcat not starting with the /usr/lib/ocf/resource.d/heartbeat/tomcat resource
>file that PCS uses. I was getting the error that a Unit file for tomcat
>could not be found using these script to debug with--
>https://roidelapluie.be/blog/2015/09/16/pcs-resource-debug/ .
That's strange. The tomcat package on CentOS should provide
/usr/lib/systemd/system/tomcat at .service which is the service-file the
reource agent is trying to use.
>
>Kind regards,
>
>Sean
>
>On Wed, Jan 3, 2018 at 6:27 PM Oyvind Albrigtsen <oalbrigt at redhat.com>
>wrote:
>
>> On 02/01/18 21:31 +0000, Sean Beeson wrote:
>> >Hi,
>> >
>> >I just wanted to add the solution for future reference.
>> >
>> >On CentOS 7 PCS starts and stops Tomcat as a systemd service named
>> >tomcat at tomcat.service, so  a Unit file for the service in
>> >/etc/systemd/system/ is needed. The simplest way to create that Unit file
>> >is to do this on both the primary and secondary-- cp
>> >/etc/systemd/system/tomcat.service
>> >/etc/systemd/system/tomcat at tomcat.service.
>> It's a systemd instance of tomcat at .service, so you dont need
>> to create a new .service-file.
>> >
>> >Kind regards,
>> >
>> >Sean
>> >
>> >
>> >On Thu, Dec 7, 2017 at 3:47 AM Sean Beeson <seanbeeson at gmail.com> wrote:
>> >
>> >> Hi, Oyvind.
>> >>
>> >> Thanks for that lead. I'll try it.
>> >>
>> >> Kind regards,
>> >>
>> >> Sean
>> >>
>> >> On Tue, Dec 5, 2017 at 6:08 PM Oyvind Albrigtsen <oalbrigt at redhat.com>
>> >> wrote:
>> >>
>> >>> On 04/12/17 16:29 +0000, Sean Beeson wrote:
>> >>> >Thank you for the replay, Oyvind. I gave it plenty of time to start
>> up.
>> >>> >using  tomcat_name="tomcat" it starts what I can only call a lifeless
>> >>> PID,
>> >>> >but it never seems to actually start up. The catalina.out file is
>> never
>> >>> >touched, so it never has anything in it to indicate a problem.
>> Pacemaker
>> >>> >does seem to be managing it though because, although this PID shows,
>> it
>> >>> >will report it as not running and then move everything to the other
>> node.
>> >>> >It will do that a couple times, but that eventually stops as well.
>> >>> Try "pcs resource disable <resource>" and then "pcs resource
>> >>> debug-start --full <resource>". The last command will start the
>> >>> resource and show you which commands are run, so you can troubleshoot
>> >>> why it's failing.
>> >>> >
>> >>> >Kind regards,
>> >>> >
>> >>> >Sean
>> >>> >
>> >>> >On Thu, Nov 30, 2017 at 10:40 PM Oyvind Albrigtsen <
>> oalbrigt at redhat.com>
>> >>> >wrote:
>> >>> >
>> >>> >> Tomcat can be very slow at startup depending on the modules you use,
>> >>> >> so you can either disable modules you arent using to make it start
>> >>> >> faster or set a higher start timeout via "pcs resource <resource> op
>> >>> >> start interval=".
>> >>> >>
>> >>> >> On 30/11/17 13:26 +0000, Sean Beeson wrote:
>> >>> >> >Hi, list.
>> >>> >> >
>> >>> >> >This is a pretty basic question. I have gone through what I could
>> >>> find on
>> >>> >> >setting up Tomcat service as a resource to a cluster, but did not
>> find
>> >>> >> >exactly the issue I am having. Sorry, if it has been covered
>> before.
>> >>> >> >
>> >>> >> >I am attempting this on centos-release-7-4.1708.el7.centos.x86_64.
>> >>> >> >The pcs I have installed is pcs-0.9.158-6.el7.centos.x86_64
>> >>> >> >The resource-agents installed is
>> >>> resource-agents-3.9.5-105.el7_4.2.x86_64
>> >>> >> >
>> >>> >> >I have DRBD, MySql, and a virtual IP running spectacularly well and
>> >>> they
>> >>> >> >failover perfectly and do exactly what I want them. I can add
>> Tomcat
>> >>> as a
>> >>> >> >resource just fine, but it never starts and I can not fined
>> anything
>> >>> in
>> >>> >> any
>> >>> >> >log file that indicates why. Pcs does at some point know to check
>> on
>> >>> it,
>> >>> >> >but simply says Tomcat is not running. If I run everything manually
>> >>> on in
>> >>> >> a
>> >>> >> >cluster I can manually get Tomcat to start with systemctl. Here is
>> >>> how I
>> >>> >> am
>> >>> >> >try to configure it.
>> >>> >> >
>> >>> >> >[root at centos7-ha-lab-01 ~]# pcs status
>> >>> >> >Cluster name: ha-cluster
>> >>> >> >Stack: corosync
>> >>> >> >Current DC: centos7-ha-lab-02-cr (version
>> 1.1.16-12.el7_4.4-94ff4df) -
>> >>> >> >partition with quorum
>> >>> >> >Last updated: Thu Nov 30 21:03:36 2017
>> >>> >> >Last change: Thu Nov 30 20:53:37 2017 by root via cibadmin on
>> >>> >> >centos7-ha-lab-01-cr
>> >>> >> >
>> >>> >> >2 nodes configured
>> >>> >> >6 resources configured
>> >>> >> >
>> >>> >> >Online: [ centos7-ha-lab-01-cr centos7-ha-lab-02-cr ]
>> >>> >> >
>> >>> >> >Full list of resources:
>> >>> >> >
>> >>> >> > Master/Slave Set: DRBD_data_clone [DRBD_data]
>> >>> >> >     Masters: [ centos7-ha-lab-01-cr ]
>> >>> >> >     Slaves: [ centos7-ha-lab-02-cr ]
>> >>> >> > fsDRBD_data    (ocf::heartbeat:Filesystem):    Started
>> >>> >> centos7-ha-lab-01-cr
>> >>> >> > OuterDB_Service    (systemd:mysqld):    Started
>> centos7-ha-lab-01-cr
>> >>> >> > OuterDB_VIP    (ocf::heartbeat:IPaddr2):    Started
>> >>> centos7-ha-lab-01-cr
>> >>> >> > tomcat_OuterWeb    (ocf::heartbeat:tomcat):    Stopped
>> >>> >> >
>> >>> >> >Failed Actions:
>> >>> >> >* tomcat_OuterWeb_start_0 on centos7-ha-lab-01-cr 'unknown error'
>> (1):
>> >>> >> >call=67, status=Timed Out, exitreason='none',
>> >>> >> >    last-rc-change='Thu Nov 30 20:56:22 2017', queued=0ms,
>> >>> exec=180003ms
>> >>> >> >* tomcat_OuterWeb_start_0 on centos7-ha-lab-02-cr 'unknown error'
>> (1):
>> >>> >> >call=57, status=Timed Out, exitreason='none',
>> >>> >> >    last-rc-change='Thu Nov 30 20:53:23 2017', queued=0ms,
>> >>> exec=180003ms
>> >>> >> >
>> >>> >> >Daemon Status:
>> >>> >> >  corosync: active/enabled
>> >>> >> >  pacemaker: active/enabled
>> >>> >> >  pcsd: active/enabled
>> >>> >> >
>> >>> >> >I have tried with and without tomcat_name=tomcat_OuterWeb and
>> tomcat
>> >>> and
>> >>> >> >root for tomcat_user=. Neither work.
>> >>> >> >
>> >>> >> >Here is the command I am using to add it.
>> >>> >> >
>> >>> >> >pcs resource create tomcat_OuterWeb ocf:heartbeat:tomcat
>> >>> >> >java_home="/opt/java/jre1.7.0_80" catalina_home="/opt/tomcat7"
>> >>> >> >catalina_opts="-Dbuild.compiler.emacs=true -Dfile.encoding=UTF-8
>> >>> >> >-Djava.util.logging.config.file=/opt/tomcat7/conf/log4j.properties
>> >>> >> >-Dlog4j.configuration=file:/opt/tomcat7/conf/log4j.properties
>> >>> -Xms1024m
>> >>> >> >-Xmx1024m -XX:PermSize=256m -XX:MaxPermSize=512m"
>> tomcat_user="root"
>> >>> op
>> >>> >> >monitor interval="15s" op start timeout="180s"
>> >>> >> >
>> >>> >> >I have tried also the most basic.
>> >>> >> >pcs resource create tomcat_OuterWeb ocf:heartbeat:tomcat
>> >>> >> >java_home="/opt/java/jre1.7.0_80" catalina_home="/opt/tomcat7"
>> >>> >> >tomcat_name="tomcat_OuterWeb" tomcat_user="root" op monitor
>> >>> interval="15s"
>> >>> >> >op start timeout="180s"
>> >>> >> >
>> >>> >> >I other examples I have seen they usually use params then the
>> options
>> >>> in
>> >>> >> >these command to add Tomcat as a resource, but when  I use that it
>> >>> tells
>> >>> >> me
>> >>> >> >that is an unrecognized option and it then accepts the options
>> >>> without it
>> >>> >> >just fine. I was led to think this was a difference in version of
>> the
>> >>> >> >resource-agents perhaps.
>> >>> >> >
>> >>> >> >Any idea why I can not get Tomcat to start or some lead to the
>> >>> logging I
>> >>> >> >could look at to understand why it is failing would be great.
>> Nothing
>> >>> >> shows
>> >>> >> >in messages, catalina.out, pcsd.log, nor the resource
>> >>> >> >log--tomcat_OuterWeb.log. However, it does make the resource log,
>> but
>> >>> it
>> >>> >> >only has this in it, which seems to be false:
>> >>> >> >
>> >>> >> >2017/11/30 20:50:22: start ===========================
>> >>> >> >2017/11/30 20:53:22: stop  ###########################
>> >>> >> >2017/11/30 20:56:22: start ===========================
>> >>> >> >2017/11/30 20:59:22: stop  ###########################
>> >>> >> >
>> >>> >> >The only other thing is: * tomcat_OuterWeb_start_0 on
>> >>> centos7-ha-lab-01-cr
>> >>> >> >'unknown error' (1): call=67, status=Timed Out, exitreason='none',
>> >>> >> >
>> >>> >> >Again, any ideas would be appreciated. Thank you.
>> >>> >> >
>> >>> >> >Kind regards,
>> >>> >> >
>> >>> >> >Sean
>> >>> >>
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