prepare profiler container to run both binaries

Dockerfile

@@ -1,8 +1,24 @@
 FROM alpine:latest
 RUN apk update
-RUN apk add libvirt-client ncurses5-libs
+RUN apk add libvirt-client ncurses5-libs git gettext curl bash make
 RUN mkdir /lib64 && ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2
 RUN ln -s /usr/lib/libncurses.so.5 /usr/lib/libtinfo.so.5
+
+# use bpkg to handle complex bash entrypoints
+RUN curl -Lo- "https://raw.githubusercontent.com/bpkg/bpkg/master/setup.sh" | bash
+RUN bpkg install cha87de/bashutil -g
+
+# copy entrypoint
+RUN mkdir -p /opt/docker-init
+ADD init /opt/docker-init
+
+# add kvmtop binaries
 ADD kvmtop /bin/kvmtop
 ADD kvmprofiler /bin/kvmprofiler
-CMD [ "/bin/kvmtop" ]
+
+# set parameters
+ENV PARAMS "-c qemu:///system --printer=text --cpu --mem --net --disk"
+
+# start from init folder
+WORKDIR /opt/docker-init
+ENTRYPOINT ["./entrypoint"]

init/entrypoint

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# include bpkg  dependencies
+source /usr/local/bin/retry
+source /usr/local/bin/bgo
+source /usr/local/bin/bgowait
+
+##############################################################################
+function start_metrics(){
+    kvmtop $PARAMS
+}
+function start_profiler(){
+    kvmprofiler $PARAMS
+}
+function start(){
+    echo "starting applications..."
+    bgo start_metrics start_profiler
+    if [[ $? != 0 ]]; then
+        echo "start failed. exiting now." >&2
+        exit 1
+    fi
+}
+
+##############################################################################
+function main(){
+    # start
+    start 
+    if [[ $? != 0 ]]; then
+        echo "start failed. exiting now." >&2
+        exit 1
+    fi    
+
+    # wait
+    echo "done. now waiting for services."
+    #freq=5; waitForN=-1; killTasks=0 # fail one, ignore (development mode)
+    freq=5; waitForN=1; killTasks=1 #fail one, fail all (production mode)
+    bgowait $freq $waitForN $killTasks
+}
+
+if [[ "$1" == "" ]]; then
+    main
+else
+    exec "$@"
+fi