Improve rancher script

Author: moul

examples/start-rancher.sh

@@ -1,43 +1,75 @@
 #!/bin/sh
+## depends on docker client, curl, docker-machine + docker-machine-driver-scaleway, jq
+
+
+# looking for existing rancher-server
+if docker-machine inspect rancher-server >/dev/null; then
+    echo "[-] rancher-server already exists."
+    echo "    you need to remove your previous rancher machines from docker-machine before running this script."
+    exit 1
+fi
+
+
+set -xe
+SLAVES=3
+
 
 # create a machine for the Rancher server
-docker-machine create -d scaleway --scaleway-name=rancher-server rancher-server || exit 1
+docker-machine create -d scaleway --scaleway-name=rancher-server rancher-server
+
 
 # configure shell to use rancher-server
 eval $(docker-machine env rancher-server)
 
-# create a machine for a Rancher host
-docker-machine create -d scaleway --scaleway-name=rancher-host-1 rancher-host-1 || exit 1 &
+
+# create machines for a Rancher host (slaves)
+for i in $(seq 1 ${SLAVES}); do
+    docker-machine create -d scaleway --scaleway-name=rancher-host-$i rancher-host-$i &
+done
+
 
 # start a Rancher Server on rancher-server
-docker run -d --restart=always -p 8080:8080 rancher/server || exit 1
+docker run -d --restart=always -p 8080:8080 rancher/server
+(
+    set +xe
+    false
+    while [ "$?" != "0" ]
+    do
+        # wait for Rancher Server installation
+        docker logs $(docker ps -q) | grep "Startup Succeeded"
+    done
+)
 
-false
-while [ "$?" != "0" ]
-do
-	# wait for Rancher Server installation
-	docker logs $(docker ps -q) | grep "Startup Succeeded"
-done
 
 # wait for background tasks
-wait `jobs -p` || true
+wait `jobs -p`; sleep 10
 
-IP=$(docker-machine ip rancher-server)
 
-sleep 10
 
 # generate a token
-curl 'http://'$IP':8080/v1/registrationtoken' -H 'x-api-project-id: 1a5' -H 'Accept: application/json' --data-binary '{"type":"registrationToken"}' --compressed > /dev/null
+RANCHER_IP=$(docker-machine ip rancher-server)
+curl "http://${RANCHER_IP}:8080/v1/registrationtoken" \
+     -H 'x-api-project-id: 1a5' \
+     -H 'Accept: application/json' \
+     --data-binary '{"type":"registrationToken"}' \
+     --compressed > /dev/null
 sleep 5
-CMD=$(curl 'http://'$IP':8080/v1/registrationtokens?state=active&limit=-1' -H 'x-api-project-id: 1a5' -H 'Accept: application/json' --compressed | jq '.data[0].command' | sed 's/sudo//g' | tr -d '"')
+
 
 # start a Rancher Agent on rancher-server
-$CMD || exit 1
+AGENT_CMD=$(
+    curl "http://${RANCHER_IP}:8080/v1/registrationtokens?state=active&limit=-1" -H 'x-api-project-id: 1a5' -H 'Accept: application/json' --compressed \
+        | jq -r '.data[0].command' \
+        | sed 's/sudo//g'
+         )
+${AGENT_CMD}
+
 
-# configure shell to use rancher-host-1
-eval $(docker-machine env rancher-host-1)
+# start a Rancher Agent on rancher-host-X (slaves)
+for i in $(seq 1 ${SLAVES}); do
+    eval $(docker-machine env rancher-host-$i)
+    ${AGENT_CMD}
+done
 
-# start a Rancher Agent on rancher-host-1
-$CMD || exit 1
 
-echo "Open your browser at http://"$IP":8080"
+echo "Open your browser at http://${RANCHER_IP}:8080"