From 118ff790598aebf3c3f11a2ed73f0c842ae83e9c Mon Sep 17 00:00:00 2001
From: root
Date: Tue, 16 May 2017 23:57:27 +0200
Subject: Add LXC containers upgrade script

---
 upgrade-containers.sh | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 upgrade-containers.sh

diff --git a/upgrade-containers.sh b/upgrade-containers.sh
new file mode 100755
index 0000000..dd4bba2
--- /dev/null
+++ b/upgrade-containers.sh
@@ -0,0 +1,35 @@
+#!/bin/sh -euf
+
+usage() (
+	echo "upgrade-containers.sh"
+	echo
+	echo "Upgrade currently running LXC containers."
+	echo "Uses apt-get for Debian and apk for Alpine."
+	echo
+)
+
+upgrade_container() (
+	NAME="$1"
+
+	RELEASE_FILE="/var/lib/lxc/$NAME/rootfs/etc/os-release"
+
+	if grep -q "ID=debian" "$RELEASE_FILE"; then
+		lxc-attach -n "$NAME" -- apt-get update
+		lxc-attach -n "$NAME" -- apt-get upgrade -y
+	elif grep -q "ID=alpine" "$RELEASE_FILE"; then
+		lxc-attach -n "$NAME" -- apk update
+		lxc-attach -n "$NAME" -- apk upgrade
+	fi
+)
+
+upgrade_running_containers() (
+	for CONTAINER in $(lxc-ls --running); do
+		upgrade_container "$CONTAINER"
+	done
+)
+
+case "${1:-run}" in
+	"help")	usage;;
+	"run")	upgrade_running_containers;;
+esac
+
-- 
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