Create lxc-update

usr/local/bin/lxc-update

@@ -0,0 +1,43 @@
+#!/bin/bash
+#
+# Updates all running lxc containers on a proxmox host
+
+PATH="/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin"
+
+prog="$(basename "$0")"
+
+usage() {
+	cat >&2 <<-EOF
+	usage: $prog [-h] [-e EXCLUDELIST]
+	  installs a preconfigured lxc container on your proxmox server
+    -e EXCLUDELIST   list of container ids to exclude from backup (separator: |)
+    -h               displays this help text
+  ---------------------------------------------------------------------------
+    (C) 2021         lxc-update by bashclub (https://github.com/bashclub)
+  ---------------------------------------------------------------------------
+	EOF
+	exit $1
+}
+
+condition="grep running"
+
+while getopts "hi:s:c:" opt; do
+  case $opt in
+    h) usage 0 ;;
+    e) condition="$condition | grep -vE '$OPTARG'" ;;
+    *) usage 1 ;;
+  esac
+done
+shift $((OPTIND-1))
+
+ctlist=$(pct list | $condition | cut -d' ' -f1)
+
+for ct in $ctlist; do
+    for vol in $(pct config $ct | grep -E "^rootfs|^mp[0-9]+" | cut -d ' ' -f2 | cut -d',' -f1); do
+        snapvols="$snapvols $(pvesm path $vol | cut -d'/' -f2-)";
+    done
+    zfs-auto-snapshot --quiet --syslog --label=lxc-auto-update --keep=2 --pre-snapshot=$(pct shutdown $ct && while [[ "$(pct status $ct)" == "status: running" ]];do sleep .1; echo "waiting for shutdown of ct $ct"; done) --post-snapshot=$(pct start $ct) $snapvols
+    pct exec $ct /usr/bin/apt update
+    pct exec $ct -- bash -c "DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical /usr/bin/apt -y -qq dist-upgrade"
+    snapvols=
+done