new: [mariadb] added mysql's backup install script with debian 10 compatibility

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

mariadb/hooks/install.d/60-backup.sh

@@ -0,0 +1,102 @@
+
+set -eux  ## important for unbound variable ?
+
+## Require these to be set
+# MYSQL_ROOT_PASSWORD=
+# MYSQL_CONTAINER=
+
+[ "${MYSQL_ROOT_PASSWORD}" ] || {
+    echo "Error: you must set \$MYSQL_ROOT_PASSWORD prior to running this script." >&2
+    exit 1
+}
+
+[ "${MYSQL_CONTAINER}" ] || {
+    echo "Error: you must set \$MYSQL_CONTAINER prior to running this script." >&2
+    exit 1
+}
+
+
+##
+## Init, to setup passwordless connection to mysql
+##
+
+type -p mysql >/dev/null || {
+    case $(lsb_release -is) in
+        Debian)
+            case $(lsb_release -rs) in
+                10)
+                    apt-get install -y default-mysql-client </dev/null
+                    ;;
+                *)
+                    apt-get install -y mysql-client </dev/null
+                    ;;
+            esac
+            ;;
+        Ubuntu)
+            apt-get install -y mysql-client </dev/null
+            ;;
+    esac
+}
+
+if ! [ -e "/root/.my.cnf" ]; then
+    cat <<EOF > ~/.my.cnf
+[client]
+password=${MYSQL_ROOT_PASSWORD}
+EOF
+    chmod 600 ~/.my.cnf
+fi
+
+##
+## installation of the mysql-backup script
+##
+
+
+apt-get install -y kal-shlib-{core,pretty,common} </dev/null
+cp -f resources/bin/mysql-backup /usr/local/sbin/mysql-backup
+
+
+##
+## Connection to cron
+##
+
+
+depends cron
+cat <<EOF > /etc/cron.d/mysql-backup
+SHELL=/bin/bash
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+0 * * * *   root   /usr/local/sbin/mysql-backup --host \$(docker-ip "$MYSQL_CONTAINER" 2>/dev/null | sed -r 's/ +/ /g' | cut -f 3 -d " ") | logger -t mysql-backup
+
+EOF
+
+
+##
+## Connection with backup
+##
+
+if type -p mirror-dir >/dev/null 2>&1; then
+    [ -d "/etc/mirror-dir" ] || {
+        echo "'mirror-dir' is installed but no '/etc/mirror-dir' was found." >&2
+        exit 1
+    }
+    depends shyaml
+
+    if ! sources=$(shyaml get-values default.sources < /etc/mirror-dir/config.yml); then
+        echo "Couldn't query 'default.sources' in '/etc/mirror-dir/config.yml'." >&2
+        exit 1
+    fi
+
+    if ! echo "$sources" | grep "^/var/backups/mysql$" 2>/dev/null; then
+        sed -i '/sources:/a\  - /var/backups/mysql' /etc/mirror-dir/config.yml
+        cat <<EOF >> /etc/mirror-dir/config.yml
+/var/backups/mysql:
+  exclude:
+    - "/*.inprogress"
+EOF
+    fi
+else
+    echo "warn: 'mirror-dir' not installed, backup won't be sent" >&2
+fi
+
+
+