add: backup scripts and docker image

scripts/ofelia-config.sh

@@ -0,0 +1,69 @@
+#! /bin/sh
+
+#
+# Do nothing if there is no URLs to proccess
+#
+if test -z "${BACKUP_DATABASES}"; then
+    echo >&2 "missing a list of db urls on \$BACKUP_DATABASES env var"\
+    && exit 1;
+fi
+
+#
+# Create output file if --saved option was set
+#
+while test $# -gt 0; do
+    arg_value="$1";
+    shift;
+    if test "${arg_value}" = "--save"; then
+        output_path=${OFELIA_CONFIG_PATH:-/etc/ofelia/config.ini};
+        mkdir $(dirname $output_path);
+        touch ${output_path};
+    fi
+done
+if test -z "${output_path}"; then
+    output_path=/dev/stdout;
+fi
+
+for entry in "${BACKUP_DATABASES}"; do
+    # normalize spaces
+    backup_data=$(echo ${entry} | xargs);
+    # skip if it is a empty line
+    if test -z "${backup_data}"; then
+        continue;
+    fi
+    # remove everything after first space to filter URL
+    DB_URL=${backup_data%% *};
+    # remove everything before the first space to get cron label
+    BACKUP_SCHEDULE=${backup_data#* };
+    # load url data as variables
+    dburl-parser.sh ${DB_URL} > /tmp/ofelia.dotenv;
+    source /tmp/ofelia.dotenv;
+    rm /tmp/ofelia.dotenv;
+    # fail if $DB_URL has no schema
+    if test -z "${DB_SCHEMA}"; then
+        1>&2 echo "invalid entry in \$BACKUP_DATABASES: ${entry}";
+        exit 7;
+    fi
+    # strip final : and convert schema to lowercase
+    schema="$(echo ${DB_SCHEMA%:} | tr '[:upper:]' '[:lower:]')";
+    # install schema related tools in advance
+    install-${schema}-tools.sh
+    # save backup command : should there be one script per database type
+    bkp_command="backup-${schema}.sh --url=${DB_URL}";
+    # BACKUP_SCHEDULE defaults to @daily
+    bkp_schedule="${BACKUP_SCHEDULE:-@daily}";
+    # set a title to ofelia job
+    bkp_title="backup-${DB_HOST}";
+    if test -n "${DB_NAME}"; then
+        bkp_title="${bkp_title}-${DB_NAME}";
+    fi
+    # add a entry to this backup in ofelia config file
+    cat >> ${output_path} << HEREDOC
+# sending data to ${output_path}
+[job-local "${bkp_title}"]
+$(if test "${DEBUG}" = "on"; then echo "save-only-on-error = false"; fi)
+no-overlap = true
+command = ${bkp_command}
+schedule = ${bkp_schedule}
+HEREDOC
+done;