Implement conf lock file check (#116)

It will make sure that the conf file will only be generated once
for a given container.

.dockerignore

@@ -0,0 +1 @@
+.gitignore

setup-conf.sh

@@ -2,6 +2,11 @@
 
 source /env-data.sh
 
+SETUP_LOCKFILE="${ROOT_CONF}/.postgresql.conf.lock"
+if [ -f "${SETUP_LOCKFILE}" ]; then
+	return 0
+fi
+
 # This script will setup necessary configuration to enable replications
 
 # Refresh configuration in case environment settings changed.
@@ -32,3 +37,5 @@ EOF
 echo "kernel.shmmax=543252480" >> /etc/sysctl.conf
 echo "kernel.shmall=2097152" >> /etc/sysctl.conf
 
+# Put lock file to make sure conf was not reinitialized
+touch ${SETUP_LOCKFILE}

setup-pg_hba.sh

@@ -2,6 +2,11 @@
 
 source /env-data.sh
 
+SETUP_LOCKFILE="${ROOT_CONF}/.pg_hba.conf.lock"
+if [ -f "${SETUP_LOCKFILE}" ]; then
+	return 0
+fi
+
 # This script will setup pg_hba.conf
 
 # Reconfigure pg_hba if environment settings changed
@@ -46,3 +51,6 @@ if [[ -z "$REPLICATE_FROM" ]]; then
 	echo "Add rule to pg_hba: replication user"
 	echo "host replication all 0.0.0.0/0 $authMethod" >> ${ROOT_CONF}/pg_hba.conf
 fi
+
+# Put lock file to make sure conf was not reinitialized
+touch ${SETUP_LOCKFILE}

setup-ssl.sh

@@ -2,6 +2,11 @@
 
 source /env-data.sh
 
+SETUP_LOCKFILE="${ROOT_CONF}/.ssl.conf.lock"
+if [ -f "${SETUP_LOCKFILE}" ]; then
+	return 0
+fi
+
 # This script will setup default SSL config
 
 # /etc/ssl/private can't be accessed from within container for some reason
@@ -24,3 +29,6 @@ echo "ssl_cert_file = '/etc/ssl/certs/ssl-cert-snakeoil.pem'" >> $CONF
 echo "ssl_key_file = '/etc/ssl/private/ssl-cert-snakeoil.key'" >> $CONF
 #echo "ssl_ca_file = ''                       # (change requires restart)" >> $CONF
 #echo "ssl_crl_file = ''" >> $CONF
+
+# Put lock file to make sure conf was not reinitialized
+touch ${SETUP_LOCKFILE}