Now it’s fine to configure our services.
On both nodes install and disable these services (cluster services will manage starting/stopping)
1 2 3 4 5 6 7 | yum install postfix mysqld dovecotchkconfig postfix offchkconfig mysqld offchkconfig dovecot off |
Copy the required data to our shared glusterfs storage.
1 2 3 4 5 6 7 8 9 10 11 12 13 | cp -rp /var/lib/mysql /mysql/data/cp -p /etc/my.cnf /mysql/datacp -rp /etc/postfix /mail/datacp -rp /etc/dovecot /mail/dovecotcp -p /etc/init.d/postfix /mail/data/postfix.shcp -p /etc/init.d/dovecot /mail/data/dovecot.shmkdir /mail/data/vmail |
/mail/data/vmail will hold our user mail, otherwise we are making sure that our configuration files are located on the shared storage so we have a consistent environment.
Update /mysql/data/my.cnf with
1 | datadir=/mysql/data/mysql |
Create /mail/data/mail.sh since our cluster service needs to call both postfix and dovecot.
1 2 3 4 5 6 7 8 | #!/bin/bashif [ "$1" == "status" ]; thenps -ef | grep -v grep | grep "/usr/libexec/postfix/master"exit $?else/mail/data/dovecot.sh $1; /mail/data/postfix.sh $1exit 0fi |
Please note this is a quick and dirty hack. You should have more checks than just master running since we care about dovecot as well.
Now again on both nodes, make some symbolic links to the shared storage for our services.
1 2 3 4 5 6 7 | mv /etc/postfix /etc/postfix.bakln -s /mail/data/postfix /etc/postfixmv /etc/dovecot /etc/dovecot.bakln -s /mail/data/dovecot /etc/dovecot |
You should now be able to start your services. If you run into any errors, check /var/log/messages or /var/log/cluster/cluster.log
1 2 3 4 5 6 7 | clusvcadm -d postfix-svcclusvcadm -d mysql-svcclusvcadm -e postfix-svcclusvcadm -e mysql-svc |
To store users mail in /mail/data/vmail, make the following changes to /etc/postfix/main.cf – in this example we are using LDAP.
Both nodes in this case are replicating LDAP information from another server, so both the main LDAP server and one node could go down and users could still authenticate to the cluster services.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | accounts_server_host = localhostaccounts_search_base = dc=example,dc=com#Assumes users have a mail: attribute, if not use something elseaccounts_query_filter = (mail=%u)#accounts_result_attribute = homeDirectoryaccounts_result_attribute = mail#accounts_result_format = %u/Mailboxaccounts_result_format = /var/vmail/%u/accounts_scope = subaccounts_cache = yesaccounts_bind = yesaccounts_bind_dn = cn=admin,dc=example,dc=comaccounts_bind_pw = PASSWORDaccounts_version = 3virtual_transport = virtualvirtual_uid_maps = static:5000virtual_gid_maps = static:5000virtual_mailbox_base = /virtual_mailbox_maps = ldap:accountsvirtual_mailbox_domains = example.com |
For Dovecot, configure LDAP normally and then make the following changes
1 2 3 | conf.d/auth-ldap.conf.ext: args = uid=vmail gid=vmail home=/var/vmail/%u/conf.d/10-mail.conf:mail_location = maildir:/var/vmail/%udovecot.conf:mail_location = maildir:/var/vmail/%u |
Once this is done, restart your services (clusvcadm -R servicename) and send some test e-mails to yourself.