From faf5b14d8b1e8a8c0e22e6d5984f7889e021b837 Mon Sep 17 00:00:00 2001
From: Matthias Radestock <matthias.radestock@gmail.com>
Date: Wed, 13 Jul 2016 09:48:03 +0100
Subject: [PATCH] make CNI setup work on recent Docker-for-Macs

Docker for Mac 1.12.0-rc3 (as of beta18) looks for mounted paths on VM
first, and when it doesn't find them there, it assumes they refer to
paths on the Mac OS host. At which point it will complain that the
paths don't exit.

So instead we mount / since that will always exist on the VM. It's
also what we used to do already when launching the router.

Fixes #2434.
---
 weave | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/weave b/weave
index a5ee0746..7bb3a69c 100755
--- a/weave
+++ b/weave
@@ -135,20 +135,19 @@ docker_run_options() {
     echo --privileged --net=host $(docker_sock_options)
 }
 
-cni_volume_options() {
-    [ "$1" = "setup" -o "$1" = "setup-cni" ] && echo -v /etc/cni:/etc/cni -v /opt/cni:/opt/cni
-}
-
-launch_router_options() {
-    [ "$1" = "launch" -o "$1" = "launch-router" ] && echo -v /:/host -e HOST_ROOT=/host
+exec_options() {
+    case "$1" in
+        setup|setup-cni|launch|launch-router)
+            echo -v /:/host -e HOST_ROOT=/host
+            ;;
+    esac
 }
 
 exec_remote() {
     docker $DOCKER_CLIENT_ARGS run --rm \
         $(docker_run_options) \
         --pid=host \
-        $(cni_volume_options "$@") \
-        $(launch_router_options "$@") \
+        $(exec_options "$@") \
         -e DOCKERHUB_USER="$DOCKERHUB_USER" \
         -e WEAVE_VERSION \
         -e WEAVE_DEBUG \
@@ -1034,7 +1033,7 @@ create_cni_script() {
 #!/bin/sh
 docker run --rm $(docker_run_options) --pid=host -i \\
  -e CNI_VERSION -e CNI_COMMAND -e CNI_CONTAINERID -e CNI_NETNS \\
- -e CNI_IFNAME -e CNI_ARGS -e CNI_PATH $(cni_volume_options setup) \\
+ -e CNI_IFNAME -e CNI_ARGS -e CNI_PATH -v /etc/cni:/etc/cni -v /opt/cni:/opt/cni \\
  $PLUGIN_IMAGE $COVERAGE_ARGS $2
 EOF
     chmod a+x "$1"
@@ -1050,12 +1049,12 @@ EOF
 }
 
 setup_cni() {
-    if [ -d /opt/cni/bin ] ; then
-        create_cni_script /opt/cni/bin/weave-net  --cni-net
-        create_cni_script /opt/cni/bin/weave-ipam --cni-ipam
+    if [ -d $HOST_ROOT/opt/cni/bin ] ; then
+        create_cni_script $HOST_ROOT/opt/cni/bin/weave-net  --cni-net
+        create_cni_script $HOST_ROOT/opt/cni/bin/weave-ipam --cni-ipam
     fi
-    if [ -d /etc/cni/net.d -a ! -f /etc/cni/net.d/10-weave.conf ] ; then
-        create_cni_config /etc/cni/net.d/10-weave.conf
+    if [ -d $HOST_ROOT/etc/cni/net.d -a ! -f $HOST_ROOT/etc/cni/net.d/10-weave.conf ] ; then
+        create_cni_config $HOST_ROOT/etc/cni/net.d/10-weave.conf
     fi
 }