[ClusterLabs] Unable to start Apache resource
Reid Wahl
nwahl at redhat.com
Fri Sep 29 03:55:33 EDT 2023
On Fri, Sep 29, 2023 at 12:51 AM Bartosz Kaczyński
<bkaczynski at posteo.net> wrote:
>
> Reid Wahl <nwahl at redhat.com> writes:
>
> > On Tue, Sep 19, 2023 at 9:10 AM Bartosz Kaczyński <bkaczynski at posteo.net> wrote:
> >>
> >> Greetings,
> >>
> >> I am facing an issue with launching a primitive resource in a two-node
> >> Pacemaker/Corosync cluster. I have set up a lab environment based on the
> >> guidelines from the "Say Goodbye to Downtime with SUSE Linux Enterprise
> >> Server (Repeat)" [1] course.
> >>
> >> In my lab environment, I am using openSUSE Leap 15.5.
> >> Steps I have taken so far:
> >>
> >> - Created an IP resource
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> crm configure
> >> primitive p-IP_101 IPaddr2 \
> >> params ip=172.17.17.101 cidr_netmask=24 nic=bond1 \
> >> op start timeout=20s interval=0 \
> >> op stop timeout=20s interval=0 \
> >> op monitor timeout=20s interval=10s \
> >> meta target-role=Started
> >> commit
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >>
> >> - Created an Apache resource
> >>
> >> crm configure edit # and added following content of the bottom of the
> >> file
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> primitive p-apache2_1 apache \
> >> params configfile="/etc/apache2/http_1.conf" \
> >> statusurl="172.17.17.101:8180" \
> >> op start interval=0 timeout=40 \
> >> op stop interval=0 timeout=60 \
> >> op monitor interval=10 timeout=20
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >> - Edited the Apache configuration files
> >>
> >> cp /etc/apache2/httpd.conf /etc/apache2/httpd_1.conf
> >> cp /etc/apache2/listen.conf /etc/apache2/listen_1.conf
> >>
> >> vi /etc/apache2/httpd_1.conf
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> Include /etc/apache2/listen_1.conf
> >>
> >> --snip--
> >> Pidfile /var/run/httpd_1.pid
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >> vi /etc/apache2/listen_1.conf
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> Listen 172.17.17.101:8180
> >>
> >>
> >> <IfDefine SSL>
> >> <IfDefine !NOSSL>
> >> <IfModule mod_ssl.c>
> >>
> >> Listen 172.17.17.101:8443
> >>
> >> </IfModule>
> >> </IfDefine>
> >> </IfDefine>
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >>
> >> - Ensured file synchronization using csync2
> >> - Created a resource group with primitives for the IP and Apache resources
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> crm configure
> >> group g-apache2_1 p-IP_101 p-apache2_1 description="Apache2 Instance 1"
> >> commit
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >> - Started the resources, resulting in an error (logs provided below)
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> Failed Resource Actions:
> >> * p-apache2_1_start_0 on node01 'not installed' (5): call=24, status='complete', exitreason='environment is invalid, resource considered stopped', last-rc-change='Tue Sep 19 17:17:49 2023', queued=0ms, exec=39ms
> >> * p-apache2_1_start_0 on node02 'not installed' (5): call=26, status='complete', exitreason='environment is invalid, resource considered stopped', last-rc-change='Tue Sep 19 15:46:48 2023', queued=0ms, exec=40ms
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> crm configure rsctest p-apache2_1
> >> INFO: Probing resources
> >> INFO: Testing on node01: p-apache2_1
> >> ERROR: host node01 (exit code 5)
> >>
> >> INFO: Testing on node02: p-apache2_1
> >> ERROR: host node02 (exit code 5)
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >>
> >> The Apache server is installed on both nodes
> >>
> >> --8<---------------cut here---------------start------------->8---
> >> node01:~ # zypper se -i apache2
> >> Loading repository data...
> >> Reading installed packages...
> >>
> >> S | Name | Summary | Type
> >> ---+-----------------+--------------------------------------------------+--------
> >> i+ | apache2 | The Apache Web Server | package
> >> i | apache2-prefork | Apache 2 "prefork" MPM (Multi-Processing Module) | package
> >> i | apache2-utils | Apache 2 utilities | package
> >> node01:~ # ssh node02 zypper se -i apache2
> >> Loading repository data...
> >> Reading installed packages...
> >>
> >> S | Name | Summary | Type
> >> ---+-----------------+--------------------------------------------------+--------
> >> i+ | apache2 | The Apache Web Server | package
> >> i | apache2-prefork | Apache 2 "prefork" MPM (Multi-Processing Module) | package
> >> i | apache2-utils | Apache 2 utilities | package
> >> --8<---------------cut here---------------end--------------->8---
> >>
> >> and the firewall is disabled. What else can I check?
> >
> > Are there any more logs (for example, in /var/log/messages) from the
> > apache resource agent?
> >
> > The "environment is invalid, resource considered stopped" message
> > comes from handle_invalid_env() in the ocf-rarun file (installed at
> > /usr/lib/ocf/lib/heartbeat/ocf-rarun on my machine). It can happen if
> > one of the required binaries is not installed **or** if the apache
> > resource agent's validate_all() function fails.
> >
> > The required binaries list is empty for the apache resource agent, so
> > I suppose validate_all() is failing. There should be something in the
> > system logs.
> >
>
> Thank you for your response and the guidance - they are certainly
> helpful. Fortunately, the issue turned out to be more trivial. I made
> a mistake in defining the primitive resource for Apache, specifying a
> non-existent file, `/etc/apache2/http_1.conf`, as a parameter instead of
> `/etc/apache2/httpd_1.conf`, causing the problem. After correcting the
> filename, the resource started without any issues.
>
> Best regards,
> Bartosz Kaczyński
That's great news! Best wishes on your clustering.
> >>
> >> Best regards,
> >> Bartosz Kaczyński
> >>
> >> [1] https://open.sap.com/courses/suse2-1-pc
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--
Regards,
Reid Wahl (He/Him)
Senior Software Engineer, Red Hat
RHEL High Availability - Pacemaker
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