[FAB-3954] /examples/cluster: add client config

We want to make it as easy as possible for a client to
consume a fabric configuration. This patch adds a new
output "build/client.config".  This file is a YAML formatted
structure that can be consumed by a client.  It contains
details specific to the cluster that was created, such as IP,
port, protocols, principals, and key material.  These files
may be consumed by fabric clients, which we will take advantage
of elsewhere.

-----------------------------------------------------------
ca:
        url: http://172.18.0.2:7054
        certificate: |
              -----BEGIN CERTIFICATE-----
              MIICLTCCA......
              -----END CERTIFICATE-----

orderer: grpc://172.18.0.3:7050

peers:
       - api: grpc://172.18.0.4:7051
         events: grpc://172.18.0.4:7053
         hostname: peer1
       - api: grpc://172.18.0.7:7051
         events: grpc://172.18.0.7:7053
         hostname: peer2
       - api: grpc://172.18.0.6:7051
         events: grpc://172.18.0.6:7053
         hostname: peer3
       - api: grpc://172.18.0.5:7051
         events: grpc://172.18.0.5:7053
         hostname: peer4

identity:
        principal: Admin@org1.net
        mspid: Org1MSP
        privatekey: |
              -----BEGIN PRIVATE KEY-----
              MIGHAgEAM...
              -----END PRIVATE KEY-----
        certificate: |
              -----BEGIN CERTIFICATE-----
              MIICFjCCA...
              -----END CERTIFICATE-----
-----------------------------------------------------------

Fixes FAB-3954

Change-Id: I96a20f57fc2a7502d8d132461dccb30e8da78c59
Signed-off-by: Greg Haskins <gregory.haskins@gmail.com>

examples/cluster/Makefile

@@ -46,7 +46,7 @@ compose-up: nodes
 	@echo "Booting docker-compose environment"
 	$(COMPOSE) up -d $(DAEMONS)
 	$(DRUN) ./configure.sh $(CHANNEL_NAME) "$(CHANNEL_TXNS)" "$(PEERS)" $(TLS)
-	@./compose/report-env.sh "$(DAEMONS)"
+	@./compose/report-env.sh "$(DAEMONS)" build/client.config $(TLS)
 
 compose-down:
 	$(COMPOSE) down

examples/cluster/compose/report-env.sh

@@ -1,21 +1,93 @@
 #!/bin/bash
 
 NODES=$1
+CONFIG=$2
+TLS=$3
 
 getip() {
     HOST=$1
 
     docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $HOST
 }
 
+url() {
+    TYPE=$1
+    NODE=$2
+    PORT=$3
+
+    if [ "$TLS" == "true" ]; then
+        TYPE="$1s"
+    fi
+
+    echo $TYPE://$(getip $NODE):$PORT
+}
+
+http() {
+    NODE=$1
+    PORT=$2
+
+    echo $(url "http" $NODE $PORT)
+}
+
+grpc() {
+    NODE=$1
+    PORT=$2
+
+    echo $(url "grpc" $NODE $PORT)
+}
+
+peerurls() {
+    for i in $(seq 1 4); do
+        echo "$(url grpc peer$i, 7051)"
+    done
+}
+
 generate_hosts() {
     for NODE in $NODES; do
         echo "$(getip $NODE) $NODE"
     done
 }
 
+includefile() {
+    file=$1
+    prefix=$2
+
+    echo "|"
+
+    while IFS= read -r line; do
+        printf '%s%s\n' "$prefix" "$line"
+    done < "$file"
+}
+
 echo "========================================================================"
 echo "Cluster ready!"
 echo "========================================================================"
 echo
 generate_hosts | sort
+
+cat <<EOF > $CONFIG
+#
+# Generated by fabric.git/examples/cluster.  DO NOT EDIT!
+#
+ca:
+        url: $(http "ca" "7054")
+        certificate: $(includefile build/nodes/cli/tls/ca.crt "              ")
+
+orderer:
+        url:  $(grpc "orderer" "7050")
+        hostname: orderer
+        ca: $(includefile build/nodes/orderer/tls/ca.crt "              ")
+
+peers:
+$(for i in $(seq 1 4); do
+      echo "       - api: $(grpc peer$i 7051)"
+      echo "         events: $(grpc peer$i 7053)"
+      echo "         hostname: peer$i"
+done)
+
+identity:
+        principal: Admin@org1.net
+        mspid: Org1MSP
+        privatekey: $(includefile build/nodes/cli/tls/server.key  "              ")
+        certificate: $(includefile build/nodes/cli/tls/server.crt  "              ")
+EOF