From 247d522b7ee379e19bce92d80785999db5d99b79 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Sat, 22 Nov 2025 20:25:22 -0500
Subject: [PATCH] feat: enable live-restore by default when installing Dokku

This will help users have more seamless upgrades in the future in cases where docker is restarted.
---
 debian/control  |  4 ++--
 debian/postinst | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/debian/control b/debian/control
index 9fa5ff11d..82b6eeaa4 100644
--- a/debian/control
+++ b/debian/control
@@ -3,9 +3,9 @@ Version: 0.37.0
 Section: web
 Priority: optional
 Architecture: amd64
-Depends: apache2-utils, locales, git, cpio, cron, curl, man-db, netcat, sshcommand, docker-engine-cs (>= 19.03.0) | docker-engine (>= 19.03.0) | docker-io (>= 19.03.0) | docker.io (>= 19.03.0) | docker-ce (>= 19.03.0) | docker-ee (>= 19.03.0) | moby-engine, docker-compose-plugin | moby-compose, docker-buildx-plugin | moby-buildx, docker-container-healthchecker, docker-image-labeler, lambda-builder, net-tools, netrc, parallel, procfile-util, rsync, dos2unix, jq, unzip, util-linux
+Depends: apache2-utils, locales, git, cpio, cron, curl, man-db, netcat, sshcommand, docker-engine-cs (>= 19.03.0) | docker-engine (>= 19.03.0) | docker-io (>= 19.03.0) | docker.io (>= 19.03.0) | docker-ce (>= 19.03.0) | docker-ee (>= 19.03.0) | moby-engine, docker-compose-plugin | moby-compose, docker-buildx-plugin | moby-buildx, docker-container-healthchecker, docker-image-labeler, lambda-builder, net-tools, netrc, parallel, procfile-util, rsync, dos2unix, unzip, util-linux
 Recommends: herokuish, bash-completion, dokku-update, dokku-event-listener
-Pre-Depends: gliderlabs-sigil, nginx (>= 1.8.0) | openresty, bind9-dnsutils, debconf, plugn, sudo, python3, rsyslog
+Pre-Depends: gliderlabs-sigil, jq, nginx (>= 1.8.0) | openresty, bind9-dnsutils, debconf, plugn, sudo, python3, rsyslog
 Maintainer: Jose Diaz-Gonzalez <dokku@josediazgonzalez.com>
 Description: Docker-powered PaaS that helps build and manage the lifecycle of applications
  Dokku is an extensible, open source Platform as a Service
diff --git a/debian/postinst b/debian/postinst
index 6e6976f08..3abf72ddb 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -24,6 +24,39 @@ call-sshcommand() {
   fi
 }
 
+setup-docker-live-restore() {
+  # skip if running in docker-based installation
+  if [[ "$DOKKU_INIT_SYSTEM" == "sv" ]]; then
+    return
+  fi
+
+  # allow disabling via /etc/default/dokku
+  if [[ "$DOKKU_LIVE_RESTORE" == "false" ]]; then
+    return
+  fi
+
+  live_restore="$(docker info --format '{{ .LiveRestoreEnabled }}' || true)"
+  if [ "$live_restore" = "true" ]; then
+    echo "Docker live-restore is already enabled"
+    return
+  fi
+
+  echo "Enabling docker live-restore"
+  if [[ ! -f /etc/docker/daemon.json ]]; then
+    echo "{}" >/etc/docker/daemon.json
+  fi
+
+  config="$(jq '. + {"live-restore": true}' /etc/docker/daemon.json)"
+  echo "$config" >/etc/docker/daemon.json
+  if command -v systemctl &>/dev/null; then
+    if ! systemctl reload docker; then
+      echo "Unable to reload docker, please reload manually" 1>&2
+    fi
+  else
+    echo "Unable to reload docker, please reload manually" 1>&2
+  fi
+}
+
 setup-user() {
   echo "Setting up dokku user"
   call-sshcommand create dokku /usr/bin/dokku
@@ -135,6 +168,7 @@ case "$1" in
     dpkg-handling
     setup-plugins
     setup-sshcommand
+    setup-docker-live-restore
     ;;
 
   *)