Use busybox from alpine

Author: liam-verta

glibc/Dockerfile

@@ -29,7 +29,14 @@ RUN set -x \
         fi; \
     done
 
+FROM        ${ARCH}alpine:latest as alpine
+
 FROM        ${ARCH}busybox:glibc
 MAINTAINER  The Prometheus Authors <prometheus-developers@googlegroups.com>
 
+# Use the busybox executable from alpine which is generally patched more quickly for vulnerabilities
+RUN rm /bin/*
+COPY --from=alpine /bin/busybox /bin/
+RUN /bin/busybox --install /bin
+
 COPY --from=0 /rootfs /

uclibc/Dockerfile

@@ -28,7 +28,14 @@ RUN set -x \
         fi; \
     done
 
+FROM        ${ARCH}alpine:latest as alpine
+
 FROM        ${ARCH}busybox:uclibc
 MAINTAINER  The Prometheus Authors <prometheus-developers@googlegroups.com>
 
+# Use the busybox executable from alpine which is generally patched more quickly for vulnerabilities
+RUN rm /bin/*
+COPY --from=alpine /bin/busybox /bin/
+RUN /bin/busybox --install /bin
+
 COPY --from=0 /rootfs /