add email notify support

Makefile

@@ -9,6 +9,10 @@ BACKUP_ENABLED     ?= no
 DB_NAME            ?= template1
 # Cron args
 BACKUP_CRON        ?= 10 5 * * *
+# The address to which error messages will be sent
+# to change address you need delete file /etc/cron.d/backup,
+# change address and update deploy 
+EMAIL_ADMIN        ?= admin@domain.local
 
 # dcape container name prefix
 DCAPE_PROJECT_NAME ?= dcape
@@ -26,6 +30,10 @@ BACKUP_ENABLED=$(BACKUP_ENABLED)
 DB_NAME=$(DB_NAME)
 # Cron args
 BACKUP_CRON=$(BACKUP_CRON)
+# The address to which error messages will be sent
+# to change address you need delete file /etc/cron.d/backup,
+# change address and update deploy 
+EMAIL_ADMIN=$(EMAIL_ADMIN)
 
 # dcape postgresql container name
 DCAPE_DB=$(DCAPE_DB)
@@ -39,21 +47,49 @@ export CONFIG_DEF
 
 define EXP_SCRIPT
 [[ "$$DCAPE_DB_DUMP_DEST" ]] || { echo "DCAPE_DB_DUMP_DEST not set. Exiting" ; exit 1 ; } ; \
+WEEK_PARITY=$$(($$(date +%U) %2)); \
+DAY_TO_PROC=4; \
+DAY_OF_MONTH=$$(date +%d); \
+DAY_OF_WEEK=$$(date +%u); \
+MONTH_TO_KEEP=(1 * 30); \
+WEEKS_TO_KEEP=(2 * 7); \
+DAYS_TO_KEEP=3; \
+find $$DCAPE_DB_DUMP_DEST -type f -mtime +$$MONTH_TO_KEEP -name "*-monthly.tgz" | xargs --no-run-if-empty 'rm -f' ';' \
+find $$DCAPE_DB_DUMP_DEST -type f -mtime +$$WEEKS_TO_KEEP -name "*-weekly.tgz" | xargs --no-run-if-empty 'rm -f' ';' \
+find $$DCAPE_DB_DUMP_DEST -type f -mtime +$$DAYS_TO_KEEP -name "*-daily.tgz" | xargs --no-run-if-empty 'rm -f' ';' \
 DBS=$$@ ; \
 [[ "$$DBS" ]] || DBS=all ; \
 dt=$$(date +%y%m%d) ; \
 if [[ $$DBS == "all" ]] ; then \
   echo "Exporting all databases..." ; \
-  DBS=$$(psql --tuples-only -P format=unaligned -U postgres \
+  DBS=$$(psql --tuples-only -P format=unaligned -U postgres  \
     -c "SELECT datname FROM pg_database WHERE NOT datistemplate AND datname <> 'postgres'") ; \
 fi ; \
-echo "Backup DBs: $$DBS" ; \
 for d in $$DBS ; do \
-  dest=$$DCAPE_DB_DUMP_DEST/$${d%%.*}-$${dt}.tgz ; \
-  echo -n $${dest}... ; \
-  [ -f $$dest ] && { echo Skip ; continue ; } ; \
+  echo -n "Make daily backup DBs: $$DBS" ; \
+  dest=$$DCAPE_DB_DUMP_DEST/$${d%%.*}-$${dt}-daily.tgz ; \
+  echo -n "$${dest}..." ; \
+  [ -f $$dest ] && { echo Exist ; } ; \
   pg_dump -d $$d -U postgres -Ft | gzip > $$dest || echo "error" ; \
-  echo Done ; \
+  echo "Daily done!" ; \
+  echo -n "Make weekly backup DBs: $$DBS" ; \
+  dest=$$DCAPE_DB_DUMP_DEST/$${d%%.*}-$${dt}-weekly.tgz ; \
+  echo -n "$${dest}..." ; \
+  [ -f $$dest ] && { echo Exist ; } ; \
+  if [ $$WEEK_PARITY == "0" ]; then \
+    if [[ $$DAY_OF_WEEK == $$DAY_TO_PROC ]]; then \
+      pg_dump -d $$d -U postgres -Ft | gzip > $$dest || echo "error" ; \
+      echo "Weekly done!" ; \
+    fi; \
+  fi; \
+  echo -n "Make monthly backup DBs: $$DBS" ; \
+  dest=$$DCAPE_DB_DUMP_DEST/$${d%%.*}-$${dt}-monthly.tgz ; \
+  echo -n "$${dest}..." ; \
+  [ -f $$dest ] && { echo Exist ; } ; \
+  if [[ $$DAY_OF_MONTH == "03" ]]; then \
+    pg_dump -d $$d -U postgres -Ft | gzip > $$dest || echo "error" ; \
+    echo "Monthly done!" ; \
+  fi; \
 done
 endef
 export EXP_SCRIPT
@@ -93,10 +129,15 @@ docker-wait:
 # DB operations
 
 ## Setup host system cron
+## If need change the target "cron", you need delete file /etc/cron.d/backup
+## otherwise: make cron -> make: nothing to do for cron
 cron: /etc/cron.d/backup
 
 /etc/cron.d/backup:
-	echo "$$BACKUP_CRON op cd $$PWD && make backup" > $@
+	echo "# Set the email to wich error message will be sent" > $@
+	echo "MAILTO=$$EMAIL_ADMIN" >> $@
+	echo "# Set cron command with disable STDOUT for cron sent mail only if error exist" >> $@
+	echo "$$BACKUP_CRON op cd $$PWD && make backup > /dev/null" >> $@
 
 ## dump all databases or named database
 backup: docker-wait

README.md

@@ -9,6 +9,7 @@
 [5]: LICENSE
 
 Postgresql database backup application package for [dcape](https://github.com/dopos/dcape).
+The service uses a cron to backup all or selected databases deployed to dcape and sends a report by e-mail in cases of an error.
 
 ## Docker image used