From 515337682835baea25565b53d1efc1a9eff9f2f2 Mon Sep 17 00:00:00 2001
From: Dave Lane <dave@davelane.nz>
Date: Fri, 25 Nov 2022 16:17:05 +1300
Subject: [PATCH] adding NICE and NICE_VAL and ability to override backup
 numbers in config

---
 dbbackup-docker-compose            | 10 +++++++---
 default-docker-compose.conf-sample | 15 +++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/dbbackup-docker-compose b/dbbackup-docker-compose
index 7dcf62a..5e08f22 100755
--- a/dbbackup-docker-compose
+++ b/dbbackup-docker-compose
@@ -22,9 +22,11 @@ BU_FROOT_WEEKLY=weekly
 BU_FROOT_MONTHLY=monthly
 BU_FROOT_YEARLY=yearly
 #
+# Set backup priority: -20 highest, 0 default, 19 lowest
+NICE_VAL=0
 # this can be overridden at invocation
 BU_CONF=default-docker-compose.conf
-# # output for debugging...
+# output for debugging... 0 = false, 1 = true
 VERBOSE=0
 #
 # Stuff that should be universal for this install...
@@ -49,6 +51,8 @@ MAIL=`which mail`
 # database dump utility
 DC=`which docker-compose`
 #DEF_ARGS="-C -d -O -x"
+# nice
+NICE=`which nice`
 #
 # pattern for "ls" command to build list of
 # pruneable backup files...
@@ -142,7 +146,7 @@ do_backup() {
    echo "-- PostgreSQL Version: $VER" >> $FILE
    echo "--" >> $FILE
    echo "" >> $FILE
-   CMD="$DC exec $CONTAINER $DUMP_CMD"
+   CMD="$NICE -${NICE_VAL} $DC exec $CONTAINER $DUMP_CMD"
    verbose "doing database dump: $CMD"
    $CMD >> $FILE
 }
@@ -230,7 +234,7 @@ do_backup $FILEPATH $DC_CONTAINER
 message "completed backup"
 # compress the backup
 message "compressing $FILEPATH"
-$GZIP $FILEPATH
+$NICE -${NICE_VAL} $GZIP $FILEPATH
 # return to where you started from...
 cd $OLD_DIR
 #
diff --git a/default-docker-compose.conf-sample b/default-docker-compose.conf-sample
index 0e4c8d2..6776d5d 100644
--- a/default-docker-compose.conf-sample
+++ b/default-docker-compose.conf-sample
@@ -17,3 +17,18 @@ DUMP_CMD='pg_dumpall -c -U postgres'
 # email address to send reports to, and subject
 EMAIL=webmaster@oerfoundation.org
 EMAIL_SUBJ="Mastodon on OERu Open Postgres Backup Report"
+#
+# Optional overrides
+#
+# Default retention
+#BU_TO_KEEP_HOURLY=24
+#BU_TO_KEEP_DAILY=7
+#BU_TO_KEEP_WEEKLY=4
+#BU_TO_KEEP_MONTHLY=12
+#BU_TO_KEEP_YEARLY=7
+#
+# Set backup priority: -20 highest, 0 default, 19 lowest
+#NICE_VAL=0
+#
+# Verbosity 0 = false, 1 = true
+#VERBOSE=0