From 2cfac0e8bbdfb487129f544a8142aa5d93b3e49e Mon Sep 17 00:00:00 2001
From: Ian Campbell <ian.campbell@docker.com>
Date: Fri, 7 Jul 2017 15:44:20 +0100
Subject: [PATCH] kubernetes: Expose each node's ssh port on the host starting
 from 2222

Port base is configurable (via $KUBE_PORT_BASE envvar). Master uses this and
nodes use subsequent ports.

Check that the node number is numeric so we can add them to things, but avoid
worker node 0 since the port will clash with master.

Signed-off-by: Ian Campbell <ian.campbell@docker.com>
---
 projects/kubernetes/boot.sh | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/projects/kubernetes/boot.sh b/projects/kubernetes/boot.sh
index c11643a6b..2f69fc990 100755
--- a/projects/kubernetes/boot.sh
+++ b/projects/kubernetes/boot.sh
@@ -1,11 +1,25 @@
 #!/bin/bash -eu
+: ${KUBE_PORT_BASE:=2222}
 if [ $# -eq 0 ] ; then
     img="kube-master"
+    port=${KUBE_PORT_BASE}
     data=""
     state="kube-master-state"
 elif [ $# -gt 1 ] ; then
+    case $1 in
+	''|*[!0-9]*)
+	    echo "Node number must be a number"
+	    exit 1
+	    ;;
+	0)
+	    echo "Node number must be greater than 0"
+	    exit 1
+	    ;;
+	*) ;;
+    esac
     img="kube-node"
     name="node-${1}"
+    port=$((${KUBE_PORT_BASE} + $1))
     shift
     data="${*}"
     state="kube-${name}-state"
@@ -19,4 +33,4 @@ else
 fi
 set -x
 rm -rf "${state}"
-../../bin/linuxkit run -cpus 2 -mem 4096 -state "${state}" -disk size=4G -data "${data}" "${img}"
+../../bin/linuxkit run -publish $port:22 -cpus 2 -mem 4096 -state "${state}" -disk size=4G -data "${data}" "${img}"