Unable to run dovecot.2.3.15

[Joe Wong]

Hello,

 I am trying to setup a new server on Centos 7 running 2.3.15, I compile
the source with ./configure --with-pam , make then make install. I have
another server using 2.3.8 so I copy my config files from there to
/usr/local/etc/dovecot. I am using systemctl enable dovecot then systemctl
start dovecot , however it failed to start. There is error found in
/var/log/messages:

Jun 28 09:14:37 new-ns1 systemd: Started Dovecot IMAP/POP3 email server.
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/login/login) failed: Read-only file system (in
master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/login/pop3) failed: Read-only file system (in
master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/login/imap) failed: Read-only file system (in
master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/login/dns-client) failed: Read-only file system
(in master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/login/ipc-proxy) failed: Read-only file system
(in master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/token-login/tokenlogin) failed: Read-only file
system (in master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error:
unlink(/usr/var/run/dovecot/token-login/imap-urlauth) failed: Read-only
file system (in master-settings.c:739)
Jun 28 09:14:37 new-ns1 dovecot: Error: service(stats):
unlink(/usr/var/run/dovecot/stats-reader) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(stats):
unlink(/usr/var/run/dovecot/stats-writer) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(replicator):
unlink(/usr/var/run/dovecot/replicator) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(aggregator):
unlink(/usr/var/run/dovecot/replication-notify) failed: Read-only file
system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(aggregator):
unlink(/usr/var/run/dovecot/replication-notify-fifo) failed: Read-only file
system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(pop3):
unlink(/usr/var/run/dovecot/login/pop3) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats):
unlink(/usr/var/run/dovecot/old-stats) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats):
unlink(/usr/var/run/dovecot/old-stats-mail) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats):
unlink(/usr/var/run/dovecot/old-stats-user) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(log):
unlink(/usr/var/run/dovecot/log-errors) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(lmtp):
unlink(/usr/var/run/dovecot/lmtp) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(ipc):
unlink(/usr/var/run/dovecot/ipc) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(ipc):
unlink(/usr/var/run/dovecot/login/ipc-proxy) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(indexer-worker):
unlink(/usr/var/run/dovecot/indexer-worker) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(indexer):
unlink(/usr/var/run/dovecot/indexer) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap):
unlink(/usr/var/run/dovecot/login/imap) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap):
unlink(/usr/var/run/dovecot/imap-master) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth-worker):
unlink(/usr/var/run/dovecot/imap-urlauth-worker) failed: Read-only file
system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth):
unlink(/usr/var/run/dovecot/token-login/imap-urlauth) failed: Read-only
file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth-login):
unlink(/usr/var/run/dovecot/imap-urlauth) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-hibernate):
unlink(/usr/var/run/dovecot/imap-hibernate) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(doveadm):
unlink(/usr/var/run/dovecot/doveadm-server) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(dns-client):
unlink(/usr/var/run/dovecot/dns-client) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(dns-client):
unlink(/usr/var/run/dovecot/login/dns-client) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(director):
unlink(/usr/var/run/dovecot/director-admin) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(director):
unlink(/usr/var/run/dovecot/director-userdb) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(dict):
unlink(/usr/var/run/dovecot/dict) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(dict-async):
unlink(/usr/var/run/dovecot/dict-async) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(config):
unlink(/usr/var/run/dovecot/config) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/login/login) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/token-login/tokenlogin) failed: Read-only file
system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/auth-login) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/auth-client) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/auth-userdb) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth):
unlink(/usr/var/run/dovecot/auth-master) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth-worker):
unlink(/usr/var/run/dovecot/auth-worker) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(anvil):
unlink(/usr/var/run/dovecot/anvil) failed: Read-only file system
Jun 28 09:14:37 new-ns1 dovecot: Error: service(anvil):
unlink(/usr/var/run/dovecot/anvil-auth-penalty) failed: Read-only file
system
Jun 28 09:14:37 new-ns1 dovecot: Fatal: Failed to start listeners
Jun 28 09:14:37 new-ns1 systemd: dovecot.service: main process exited,
code=exited, status=89/n/a
Jun 28 09:14:37 new-ns1 systemd: Unit dovecot.service entered failed state.
Jun 28 09:14:37 new-ns1 systemd: dovecot.service failed.

What did I miss here ?
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