demo: Create a cluster of 5 etcd daemons

Also tweak the shell script a little and give the local and GCP
infrakit group different names.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

projects/demo/etcd/README.md

@@ -15,7 +15,7 @@ moby build etcd
 
 ## InfraKit cluster setup (OUTDATED)
 
-This should create a HyperKit based, InfraKit managed `etcd` cluster with 3 `etcd` instances.
+This should create a HyperKit based, InfraKit managed `etcd` cluster with 5 `etcd` instances.
 
 Start InfraKit:
 ```

projects/demo/etcd/etcd.sh

@@ -4,8 +4,6 @@
 set -x
 set -v
 
-# --initial-cluster argument should come from meta data
-
 # Wait till we have an IP address
 IP=""
 while [ -z "$IP" ]; do
@@ -18,6 +16,10 @@ NUM=$(echo ${IP} | cut -d . -f 4)
 PREFIX=$(echo ${IP} | cut -d . -f 1,2,3)
 NAME=infra${NUM}
 
+# This should come from Metadata
+INIT_CLUSTER=infra200=http://${PREFIX}.200:2380,infra201=http://${PREFIX}.201:2380,infra202=http://${PREFIX}.202:2380,infra203=http://${PREFIX}.203:2380,infra204=http://${PREFIX}.204:2380
+
+# Try to start in *new* cluster mode
 /usr/local/bin/etcd \
     --name ${NAME} \
     --debug \
@@ -27,13 +29,12 @@ NAME=infra${NUM}
     --listen-client-urls http://${IP}:2379,http://127.0.0.1:2379 \
     --advertise-client-urls http://${IP}:2379 \
     --initial-cluster-token etcd-cluster-1 \
-    --initial-cluster infra200=http://${PREFIX}.200:2380,infra201=http://${PREFIX}.201:2380,infra202=http://${PREFIX}.202:2380 \
+    --initial-cluster ${INIT_CLUSTER} \
     --initial-cluster-state new
 
-echo "Returned $?"
+[ $? -eq 0 ] && exit 0
 
-# If we get here, joining a new cluster failed. Let's try joining an
+# Joining the new cluster failed. Let's try joining an *existing* cluster
-# existing cluster
 /usr/local/bin/etcd \
     --name ${NAME} \
     --debug \
@@ -42,5 +43,5 @@ echo "Returned $?"
     --listen-peer-urls http://${IP}:2380 \
     --listen-client-urls http://${IP}:2379,http://127.0.0.1:2379 \
     --advertise-client-urls http://${IP}:2379 \
-    --initial-cluster infra200=http://${PREFIX}.200:2380,infra201=http://${PREFIX}.201:2380,infra202=http://${PREFIX}.202:2380 \
+    --initial-cluster ${INIT_CLUSTER} \
     --initial-cluster-state existing

projects/demo/etcd/etcd.yml

@@ -41,7 +41,7 @@ daemon:
     net: host
 outputs:
   - format: kernel+initrd
-  - format: gce
+#  - format: gcp
-    project: docker4x
+#    project: docker4x
-    bucket: rolf
+#    bucket: rolf
-    replace: true
+#    replace: true

projects/demo/etcd/infrakit-gcp.json

@@ -1,11 +1,13 @@
 {
-    "ID": "etcd",
+    "ID": "etcd.gcp",
     "Properties": {
         "Allocation": {
             "LogicalIDs": [
                 "10.132.0.200",
                 "10.132.0.201",
-                "10.132.0.202"
+                "10.132.0.202",
+                "10.132.0.203",
+                "10.132.0.204"
             ]
         },
         "Instance": {

projects/demo/etcd/infrakit.json

@@ -5,7 +5,9 @@
             "LogicalIDs": [
                 "192.168.65.200",
                 "192.168.65.201",
-                "192.168.65.202"
+                "192.168.65.202",
+                "192.168.65.203",
+                "192.168.65.204"
             ]
         },
         "Instance": {