Merge "borg-backup: implement saving a stream, use for database backups"

inventory/service/host_vars/etherpad01.opendev.org.yaml

@@ -8,3 +8,5 @@ etherpad_redirect_vhost: etherpad.openstack.org
 borg_backup_excludes_extra:
   # live db; we store daily dumps
   - /var/etherpad/*
+  # local db backups, we store stream
+  - /var/backups/etherpad-mariadb

inventory/service/host_vars/gitea01.opendev.org.yaml

@@ -7,3 +7,5 @@ borg_backup_excludes_extra:
   - /var/gitea/data/
   # db is backed up in dumps, don't capture live files
   - /var/gitea/db
+  # backed up by streaming backup
+  - /var/backups/gitea-mariadb

inventory/service/host_vars/review01.openstack.org.yaml

@@ -76,3 +76,5 @@ borg_backup_excludes_extra:
   - /home/gerrit2/review_site/cache/*
   - /home/gerrit2/review_site/tmp/*
   - /home/gerrit2/review_site/index/*
+  # dump directly via stream
+  - /home/gerrit2/mysql_backups/*

playbooks/roles/borg-backup/README.rst

@@ -15,6 +15,12 @@ correctly on the backup server.  This role sets a tuple ``borg_user``
 with the username and public key; the ``borg-backup-server`` role uses this
 variable for each host in the ``borg-backup`` group to initalise users.
 
+Hosts can place into ``/etc/borg-streams`` which should be a script
+that outputs to stdout data to be fed into a backup archive on each
+run.  This will be saved to an archive with the name of the file.
+This is useful for raw database dumps which allow ``borg`` to
+deduplicate as much as possible.
+
 **Role Variables**
 
 .. zuul:rolevar:: borg_username

playbooks/roles/borg-backup/templates/borg-backup.j2

@@ -9,6 +9,7 @@ if [ -z "$1" ]; then
 fi
 
 BORG="/opt/borg/bin/borg"
+BORG_CREATE="${BORG} create --verbose --filter AME --list --stats --show-rc --compression lz4 --exclude-caches "
 
 # Setting this, so the repo does not need to be given on the commandline:
 export BORG_REPO="ssh://{{ borg_username}}@${1}/opt/backups/{{ borg_username }}/backup"
@@ -24,31 +25,35 @@ export BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK=1
 
 # Backup the most important directories into an archive named after
 # the machine this script is currently running on:
-${BORG} create                      \
-    --verbose                       \
-    --filter AME                    \
-    --list                          \
-    --stats                         \
-    --show-rc                       \
-    --compression lz4               \
-    --exclude-caches                \
+${BORG_CREATE} \
 {% for item in borg_backup_excludes + borg_backup_excludes_extra -%}
     --exclude '{{ item }}'          \
 {% endfor -%}
-                                    \
-    ::'{hostname}-{now}'            \
+    ::'{hostname}-filesystem-{now}' \
 {% for item in borg_backup_dirs + borg_backup_dirs_extra -%}
     {{ item }} {{ '\\' if not loop.last }}
 {% endfor -%}
 
 backup_exit=$?
 
-if [ ${backup_exit} -eq 0 ]; then
-    info "Running prune"
-    ${BORG} prune --verbose --list --prefix '{hostname}-' \
-            --show-rc --keep-daily 7 --keep-weekly 4 --keep-monthly 12
-    backup_exit=$?
-fi
+for f in $(shopt -s nullglob; echo /etc/borg-streams/*)
+do
+    stream_name=$(basename $f)
+    info "Backing up stream archive $stream_name"
+    bash $f | ${BORG_CREATE} --stdin-name ${stream_name} \
+                      ::"{hostname}-${stream_name}-{now}" -
+
+    if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+        info "Streaming script ${f} failed!"
+        stream_exit=${PIPESTATUS[0]}
+    elif [[ ${PIPESTATUS[1]} -ne 1 ]]; then
+        info "Borg failed!"
+        stream_exit=${PIPESTATUS[1]}
+    else
+        stream_exit=0
+    fi
+    (( backup_exit = backup_exit || stream_exit ))
+done
 
 if [ ${backup_exit} -eq 0 ]; then
     info "Backup finished successfully"

playbooks/roles/etherpad/tasks/main.yaml

@@ -123,7 +123,7 @@
     owner: root
     group: root
 
-- name: Set up cron job to backup the database
+- name: Set up cron job for local database backup
   cron:
     name: etherpad-db-backup
     state: present
@@ -142,3 +142,17 @@
     logrotate_rotate: 2
     logrotate_file_name: /var/backups/etherpad-mariadb/etherpad-mariadb.sql.gz
     logrotate_compress: false
+
+- name: Setup db backup streaming job
+  block:
+    - name: Create backup streaming config dir
+      file:
+        path: /etc/borg-streams
+        state: directory
+
+    - name: Create db streaming file
+      copy:
+        content: >-
+          /usr/local/bin/docker-compose -f /etc/etherpad-docker/docker-compose.yaml exec -T mariadb
+          bash -c '/usr/bin/mysqldump --skip-extended-insert --databases etherpad-lite --single-transaction -uroot -p"$MYSQL_ROOT_PASSWORD"'
+        dest: /etc/borg-streams/mysql

playbooks/roles/gerrit/tasks/main.yaml

@@ -338,3 +338,16 @@
     job: 'find /home/gerrit2/review_site/logs/*.gz -mtime +30 -exec rm -f {} \;'
     minute: 1
     hour: 6
+
+- name: Setup db backup streaming job
+  block:
+    - name: Create backup streaming config dir
+      file:
+        path: /etc/borg-streams
+        state: directory
+
+    - name: Create db streaming file
+      copy:
+        content: >-
+          /usr/bin/mysqldump --defaults-file=/root/.gerrit_db.cnf --skip-extended-insert --ignore-table mysql.event --all-databases --single-transaction
+        dest: /etc/borg-streams/mysql

playbooks/roles/gitea/tasks/main.yaml

@@ -186,3 +186,16 @@
   vars:
     logrotate_file_name: /var/backups/gitea-mariadb/gitea-mariadb.sql.gz
     logrotate_compress: false
+- name: Setup db backup streaming job
+  block:
+    - name: Create backup streaming config dir
+      file:
+        path: /etc/borg-streams
+        state: directory
+
+    - name: Create db streaming file
+      copy:
+        content: >-
+            /usr/local/bin/docker-compose -f /etc/gitea-docker/docker-compose.yaml exec -T mariadb
+            bash -c '/usr/bin/mysqldump --skip-extended-insert --databases gitea --single-transaction -uroot -p"$MYSQL_ROOT_PASSWORD"'T_PASSWORD"'
+        dest: /etc/borg-streams/mysql

playbooks/test-borg-backup.yaml

@@ -0,0 +1,14 @@
+- hosts: "borg-backup"
+  tasks:
+    - name: Setup db backup streaming job
+      block:
+        - name: Create backup streaming config dir
+          file:
+            path: /etc/borg-streams
+            state: directory
+
+        - name: Create sample streaming file
+          copy:
+            content: >-
+              dd if=/dev/urandom bs=1M count=5
+            dest: /etc/borg-streams/random

zuul.d/system-config-run.yaml

@@ -347,7 +347,10 @@
     vars:
       run_playbooks:
         - playbooks/service-borg-backup.yaml
+      run_test_playbook: playbooks/test-borg-backup.yaml
     files:
+      - playbooks/service-borg-backup.yaml
+      - playbooks/test-borg-bcakup.yaml
       - playbooks/install-ansible.yaml
       - playbooks/roles/install-borg
       - playbooks/roles/borg-backup