cluster/log-dump.sh: Add a way to dump more journalctl services as well

cluster/log-dump.sh

@@ -43,6 +43,7 @@ readonly gce_logfiles="startupscript"
 readonly kern_logfile="kern"
 readonly initd_logfiles="docker"
 readonly supervisord_logfiles="kubelet supervisor/supervisord supervisor/kubelet-stdout supervisor/kubelet-stderr supervisor/docker-stdout supervisor/docker-stderr"
+readonly systemd_services="kubelet docker"
 
 # Limit the number of concurrent node connections so that we don't run out of
 # file descriptors for large clusters.
@@ -133,13 +134,16 @@ function save-logs() {
           ;;
       esac
     fi
+    local -r services=( ${systemd_services} ${LOG_DUMP_SAVE_SERVICES:-} )
 
     if log-dump-ssh "${node_name}" "command -v journalctl" &> /dev/null; then
         log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-node-installation.service" > "${dir}/kube-node-installation.log" || true
         log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-node-configuration.service" > "${dir}/kube-node-configuration.log" || true
-        log-dump-ssh "${node_name}" "sudo journalctl --output=cat -u kubelet.service" > "${dir}/kubelet.log" || true
-        log-dump-ssh "${node_name}" "sudo journalctl --output=cat -u docker.service" > "${dir}/docker.log" || true
         log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -k" > "${dir}/kern.log" || true
+
+        for svc in "${services[@]}"; do
+            log-dump-ssh "${node_name}" "sudo journalctl --output=cat -u ${svc}.service" > "${dir}/${svc}.log" || true
+        done
     else
         files="${kern_logfile} ${files} ${initd_logfiles} ${supervisord_logfiles}"
     fi