Replication updates (#374)

* Archive and restore should not be on by default. They are eclusive to each other

* add option to use gzip with wal archiving

scripts/env-data.sh

@@ -181,14 +181,30 @@ if [ -z "${ARCHIVE_MODE}" ]; then
   ARCHIVE_MODE=off
 fi
 
+if [ -z "${ARCHIVE_COMPRESSION}" ]; then
+  ARCHIVE_COMPRESSION=gzip
+fi
+
+if [ -z "${ARCHIVE_DECOMPRESSION}" ]; then
+  ARCHIVE_DECOMPRESSION=gunzip
+fi
+
 if [ -z "${ARCHIVE_COMMAND}" ]; then
-  # https://www.postgresql.org/docs/12/continuous-archiving.html#BACKUP-ARCHIVING-WAL
+  # https://www.postgresql.org/docs/14/continuous-archiving.html#BACKUP-ARCHIVING-
-  ARCHIVE_COMMAND="test ! -f ${WAL_ARCHIVE}/%f && cp %p ${WAL_ARCHIVE}/%f"
+  if [[ ${ARCHIVE_COMPRESSION} == 'gzip' ]];then
+      ARCHIVE_COMMAND="test ! -f ${WAL_ARCHIVE}/%f && gzip  %p > ${WAL_ARCHIVE}/%f.gz "
+  else
+      ARCHIVE_COMMAND="test ! -f ${WAL_ARCHIVE}/%f && cp %p ${WAL_ARCHIVE}/%f"
+  fi
 fi
 
 if [ -z "${RESTORE_COMMAND}" ]; then
-  # https://www.postgresql.org/docs/12/runtime-config-wal.html
+  # https://www.postgresql.org/docs/14/runtime-config-wal.html
-  RESTORE_COMMAND="cp ${WAL_ARCHIVE}/%f \"%p\""
+  if [[ "${ARCHIVE_DECOMPRESSION}" == 'gunzip' ]];then
+    RESTORE_COMMAND="gunzip < ${WAL_ARCHIVE}/%f.gz > %p"
+  else
+    RESTORE_COMMAND="cp ${WAL_ARCHIVE}/%f \"%p\""
+  fi
 fi
 
 if [ -z "${ARCHIVE_CLEANUP_COMMAND}" ]; then

scripts/setup-conf.sh

@@ -77,7 +77,6 @@ if [[ ${ARCHIVE_MODE} =~ [Oo][Nn] ]];then
 cat >> ${ROOT_CONF}/streaming_replication.conf <<EOF
 archive_mode = ${ARCHIVE_MODE}
 archive_command = '${ARCHIVE_COMMAND}'
-restore_command = '${RESTORE_COMMAND}'
 archive_cleanup_command = '${ARCHIVE_CLEANUP_COMMAND}'
 EOF
 fi