Install a script to snapshot the k8s bhyve virtual machines and persistent volume space.

ansible/roles/mrmanager/files/k8s_snapshot.bash

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+#!/usr/bin/env bash
+#
+# Kill the virtual machines, take a snapshot, and start the virtual machines up again.
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+############## Setup #########################
+
+function die {
+    local status_code="$1"
+    shift
+    (>&2 echo "${@}")
+    exit "$status_code"
+}
+
+function log {
+    (>&2 echo "${@}")
+}
+
+############## Program #########################
+
+function main {
+    snapshot_name="$1"
+    kill_all_bhyve
+    log "Taking snapshot $1"
+    for worker in worker0 worker1 worker2 controller0 controller1 controller2; do
+        doas zfs snapshot -r zdata/vm/${worker}/disk0@${snapshot_name}
+    done
+    doas zfs snapshot zdata/k8spersistent@${snapshot_name}
+    launch_all_bhyve
+    log "Done."
+}
+
+function kill_all_bhyve {
+    log "Killing all virtual machines."
+    doas killall bhyve; while true; do tmux ls || break; sleep 2; done;
+}
+
+function launch_all_bhyve {
+    log "Launching all virtual machines."
+    for vm in poudriere controller0 controller1 controller2 worker0 worker1 worker2; do tmux new -d -s $vm doas bhyve_netgraph_bridge start $vm zdata/vm/$vm /vm/$vm; sleep 5; done
+}
+
+main "$@"