Add healthcheck

Dockerfile

@@ -8,5 +8,10 @@ COPY --from=qemu-user-static /usr/bin/qemu-* /usr/bin/
 ARG GOARCH=amd64
 COPY ./cadvisor-${GOARCH} /usr/bin/cadvisor
 
+ENV CADVISOR_HEALTHCHECK_URL=http://localhost:8080/healthz
+
+HEALTHCHECK --interval=30s --timeout=3s \
+  CMD wget --quiet --tries=1 --spider $CADVISOR_HEALTHCHECK_URL || exit 1
+
 EXPOSE 8080
 ENTRYPOINT ["/usr/bin/cadvisor", "-logtostderr"]

README.md

@@ -1,3 +1,7 @@
 # cadvisor-multi-arch
 
 A multi-arch build script for generating arm images of cadvisor
+
+## Note
+
+This does not include `libpfm` or `netgo`, which the upstream does include.