Apache service configuration on Veritas Cluster

VERITAS +  APACHE SERVICE GROUP CONFIGURATION

We are going to configure Veritas cluster server for apache service.

Server hostname      :    node1.example.com

Server hostname      :    node2.example.com

OS                   :    RHEL 5.6 64 bit

Make sure the time sync is configured on both the nodes.

Make sure hostnames are resolving on both the nodes. Edit /etc/hosts file and update the hostnames.

# more /etc/hosts

127.0.0.1               localhost.localdomain localhost

::1             localhost6.localdomain6 localhost6

192.168.80.21   node1.example.com       node1

192.168.80.22   node2.example.com       node2

Make ssh keyless authentication on both the nodes.

# ssh-keygen –t rsa

node1 # ssh-copy-id -i .ssh/id_rsa.pub node2

Do the same steps on node2

Cluster configuration file “/etc/VRTSvcs/conf/config/main.cf”

Cluster log file location “/var/VRTSvcs/log/engine_A.log”

By default configuration file will be in read only mode. We have to make that as RW.

# haclus -display | grep -i readonly

ReadOnly               1

# haconf –makerw à to make the config file to Read Write mode.

# haclus -display | grep -i readonly

ReadOnly               0

To make the config file as “RO”

# haconf -dump –makero

Creating apache service group

# hagrp –add apachesg

# hagrp –modify apachesg SystemList node1 0 node 1 à (0 and 1 are priority)

# hagrp –modify AutoStartList node1 node2 à (node1 and node2 are node names)

If we are going to use load balancer then

# hagrp –modify apachesg Parallel 1

To list out the cluster

# hagrp -list

ClusterService          node1

ClusterService          node2

apachesg                node1

apachesg                node2

To display the brief information

# hagrp –display

Creating resources

Creating NIC Resources

# hares –add nic_apache NIC apachesg

# hares –modify nic_apache Enabled 1

Enabled 1 à Veritas will not manage if it is not enabled

# hares –modify nic_apache Critical 0

# hares –modify nic_apache Device eth0

Creating IP resources

# hares –add ip_apache IP apachesg

# hares –modify ip_apache Enabled 1

# hares –modify ip_apache Device eth0

# hares –modify ip_apache Address 192.168.80.11

# hares –modify ip_apache NetMask 255.255.255.0

# hares –modify ip_apache Critical 0

Creating Disk Group resources

# hares –add apachedg DiskGroup apachesg

# hares –modify apachedg Enabled 1

# hares –modify apachedg DiskGroup appdg

# hares –modify apachedg Critical 0

Creating volume resources

# hares –add apachevol Volume apachesg

# hares –modify apachevol Enabled 1

# hares –modify apachevol DiskGroup appdg

# hares –modify apachevol Volume mirvol1

# hares –modify apachevol Critical 0

Creating mount point resources

# hares –add apachemount Mount apachesg

# hares –modify apachemount Enabled 1

# hares –modify apachemount BlockDevice /dev/vx/dsk/appdg/mirvol1

# hares –modify apachemount MountPoint /var/www/html

# hares –modify apachemount FsckOpt %-y

# hares –modify apachemount FSType vxfs

# hares –modify apachemount Critical 0

Creating apache resource

# hares –add apacheservice Apache apachesg

# hares –modify apacheservice Enabled 1

# hares –modify apacheserivce httpdDir /usr/sbin

# hares –modify apacheservice ConfigFile /etc/httpd/conf/httpd.conf

# hares –modify apacheservice Port 80

# hares –modify apacheservice Critical 1

Creating Dependencies

# hares –link ip_apache nic_apache

# hares –link apachevol apachedg

# hares –link apachemount apachevol

To list the dependencies

# hares –dep

Check hastauts –sum output

# hastatus -sum

-- SYSTEM STATE

-- System               State                Frozen

A  node1                RUNNING              0

A  node2                RUNNING              0

-- GROUP STATE

-- Group           System               Probed     AutoDisabled    State

B  ClusterService  node1                Y          N               OFFLINE

B  ClusterService  node2                Y          N               ONLINE

B  apachesg        node1                Y          N               OFFLINE

B  apachesg        node2                Y          N               ONLINE

Now the apache service group is online.

Switch the service group from node2 to node 1

# hagrp –switch apachesg –to node1

# hastatus -sum                                                                                     Thu Jan  2 03:23:32 2014

-- SYSTEM STATE

-- System               State                Frozen

A  node1                RUNNING              0

A  node2                RUNNING              0

-- GROUP STATE

-- Group           System               Probed     AutoDisabled    State

B  ClusterService  node1                Y          N               OFFLINE

B  ClusterService  node2                Y          N               ONLINE

B  apachesg        node1                Y          N               ONLINE

B  apachesg        node2                Y          N               OFFLINE

Now the apache service group is online on node1.

node1 ~]# ip a | grep -i 192.168.80.11 --color

    inet 192.168.80.11/24 scope global secondary eth0:0

--------------Veritas apache service group configuration completed successfully--------------