添加 mysql redis postgres 插件

plugins/postgres/subcommands/backup

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
+
+service-backup-cmd() {
+  #E backup the 'lollipop' service to the 'my-s3-bucket' bucket on AWS
+  #E dokku $PLUGIN_COMMAND_PREFIX:backup lollipop my-s3-bucket --use-iam
+  #E restore a backup file (assuming it was extracted via 'tar -xf backup.tgz')
+  #E dokku $PLUGIN_COMMAND_PREFIX:import lollipop < backup-folder/export
+  #F -u|--use-iam, use the IAM profile associated with the current server
+  #A service, service to run command against
+  #A bucket-name, name of the s3 bucket to upload backups to
+  declare desc="create a backup of the $PLUGIN_SERVICE service to an existing s3 bucket"
+  local cmd="$PLUGIN_COMMAND_PREFIX:backup" argv=("$@")
+  [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1" BUCKET_NAME="$2" USE_IAM_OPTIONAL_FLAG="$3"
+  is_implemented_command "$cmd" || dokku_log_fail "Not yet implemented"
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a valid name for the service"
+  [[ -z "$BUCKET_NAME" ]] && dokku_log_fail "Please specify an aws bucket for the backup"
+  verify_service_name "$SERVICE"
+  service_backup "$SERVICE" "$BUCKET_NAME" "$USE_IAM_OPTIONAL_FLAG"
+}
+
+service-backup-cmd "$@"