Add KVM tests to healthcheck

Signed-off-by: Kyle Harding <kyle@balena.io>

Dockerfile

@@ -116,7 +116,7 @@ CMD [ "/usr/local/bin/usage.sh" ]
 FROM alpine:3.18 AS alpine-rootfs
 
 # hadolint ignore=DL3018
-RUN apk add --no-cache bash ca-certificates ca-certificates curl iproute2 iputils-ping lsblk
+RUN apk add --no-cache bash ca-certificates ca-certificates curl iproute2 iputils-ping kmod lsblk
 
 FROM jailer AS alpine-test
 
@@ -133,7 +133,7 @@ FROM debian:bookworm AS debian-rootfs
 
 # hadolint ignore=DL3008
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends curl iproute2 iputils-ping ca-certificates util-linux \
+    && apt-get install -y --no-install-recommends ca-certificates cpu-checker curl iproute2 iputils-ping util-linux \
     && rm -rf /var/lib/apt/lists/*
 
 FROM jailer AS debian-test
@@ -147,7 +147,7 @@ FROM ubuntu:jammy AS ubuntu-rootfs
 
 # hadolint ignore=DL3008
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends ca-certificates curl iproute2 iputils-ping util-linux \
+    && apt-get install -y --no-install-recommends ca-certificates cpu-checker curl iproute2 iputils-ping util-linux \
     && rm -rf /var/lib/apt/lists/*
 
 FROM jailer AS ubuntu-test

overlay/usr/local/bin/healthcheck.sh

@@ -24,6 +24,13 @@ ping -c 4 -M "do" -s 1472 "$(head -1 /etc/resolv.conf | awk '{print $2}')"
 
 curl -fsSL https://raw.githubusercontent.com/dylanaraps/neofetch/7.1.0/neofetch | bash
 
+test -r /dev/kvm
+test -w /dev/kvm
+
+if which kvm-ok > /dev/null; then
+    kvm-ok
+fi
+
 mkdir -p /mnt/data
 mount -v /dev/vdb /mnt/data
 touch /mnt/data/healthy