From 171620046df52d98d50f4a8953f1eb04d02a83d4 Mon Sep 17 00:00:00 2001
From: Felix Ableitner <me@nutomic.com>
Date: Mon, 11 Mar 2019 22:02:07 +0100
Subject: [PATCH] Add migration script

---
 docker-compose.yaml | 10 +++---
 migration.sh        | 76 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+), 5 deletions(-)
 create mode 100755 migration.sh

diff --git a/docker-compose.yaml b/docker-compose.yaml
index d9594a2..6210c72 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -10,7 +10,7 @@ services:
       - "443:443"   # The HTTPS port
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock # So that Traefik can listen to the Docker events
-      - ./docker-volume/traefik/acme.json:/etc/acme.json
+      - ./docker-volumes/traefik/acme.json:/etc/acme.json
       - ./traefik.toml:/traefik.toml
     restart: "always"
     # If you want to use the Traefik dashboard, you should expose it on a 
@@ -27,8 +27,8 @@ services:
       traefik.frontend.rule: "Host:${PEERTUBE_WEBSERVER_HOSTNAME}"
       traefik.port: "9000"
     volumes:
-      - ./docker-volume/data:/data
-      - ./docker-volume/config:/config
+      - ./docker-volumes/data:/data
+      - ./docker-volumes/config:/config
     depends_on:
       - postgres
       - redis
@@ -42,7 +42,7 @@ services:
       POSTGRES_PASSWORD: ${PEERTUBE_DB_PASSWORD}
       POSTGRES_DB: peertube
     volumes:
-      - ./docker-volume/db:/var/lib/postgresql/data
+      - ./docker-volumes/db:/var/lib/postgresql/data
     restart: "always"
     labels:
       traefik.enable: "false"
@@ -50,7 +50,7 @@ services:
   redis:
     image: redis:5-alpine
     volumes:
-      - ./docker-volume/redis:/data
+      - ./docker-volumes/redis:/data
     restart: "always"
     labels:
       - "traefik.enable=false"
diff --git a/migration.sh b/migration.sh
new file mode 100755
index 0000000..bbe92b5
--- /dev/null
+++ b/migration.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+set -e
+
+DOMAIN="peertube.social"
+OLD_SERVER="migration-user@$DOMAIN"
+OLD_BASE_FOLDER="/var/www/peertube"
+NEW_BASE_FOLDER="/peertube/docker-volumes"
+RSYNC_PARAMS="-a --rsync-path=\"sudo rsync\" --bwlimit=5000"
+
+function sync-volumes {
+    mkdir -p "$NEW_BASE_FOLDER"
+    mkdir -p "$NEW_BASE_FOLDER/data/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/config/" "$NEW_BASE_FOLDER/config/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/avatars/" "$NEW_BASE_FOLDER/data/avatars/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/cache/" "$NEW_BASE_FOLDER/data/cache/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/captions/" "$NEW_BASE_FOLDER/data/captions/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/previews/" "$NEW_BASE_FOLDER/data/previews/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/thumbnails/" "$NEW_BASE_FOLDER/data/thumbnails/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/torrents/" "$NEW_BASE_FOLDER/data/torrents/"
+
+    # TODO: change folders in config/docker-compose
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/external/videos/" "/mnt/external/videos/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/external/redundancy/" "/mnt/external/redundancy/"
+    rsync $RSYNC_PARAMS "$OLD_SERVER:$OLD_BASE_FOLDER/storage/external/tmp/" "/mnt/external/tmp/"
+}
+
+if [ "$(whoami)" != "root" ]; then
+    echo "You need to run this script as root"
+    exit 1
+fi
+
+if [ "$(ssh "$OLD_SERVER" sudo whoami)" != "root" ]; then
+    echo "passwordless sudo needs to be available on $OLD_SERVER"
+    exit 1
+fi
+
+
+echo "Before running this script, ensure the following:
+- this script is running on the new server (migration target)
+- docker-compose based setup for peertube is already installed in /peertube/
+- set reverse dns for new server to $DOMAIN
+- set DNS TTL for $DOMAIN to the minimum possible value
+- new external storage is mounted under /mnt/external/
+- backups are in place and tested (ideally also of videos)
+"
+
+read -p "Continue? [y/N] " yn
+if [ "$yn" != "y" ]; then
+    exit
+fi
+
+# remove any existing volume files
+# https://stackoverflow.com/a/790245
+rm -r "$NEW_BASE_FOLDER"/* | true
+# dont delete this because it would take too long to sync
+#rm -r "/mnt/external/*" | true
+
+# copy volumes to local server
+# we do this while the old server is still running to reduce downtime
+sync-volumes
+
+read -p "Initial copy complete. Do you want to complete the migration now? [y/N] " yn
+if [ "$yn" != "y" ]; then
+    exit
+fi
+
+# shutdown peertube (it will keep seeding videos)
+ssh $OLD_SERVER sudo systemctl stop peertube
+
+# now that the old server is offline, we can do a final copy
+sync-volumes
+
+# TODO: also need to update domain in .env and traefik.toml (maybe with sed, or just set it before we migrate)
+docker-compose -f "$NEW_BASE_FOLDER/docker-compose.yaml" up -d
+
+echo "Now update the dns entries for $DOMAIN to point at the new server"