executor, scheduler: make default pod roles configurable

Currently if a pod is being scheduled with no meta.RolesKey label
attached to it, per convention the first configured mesos (framework)
role is being used.

This is quite limiting and also lets e2e tests fail. This commit
introduces a new configuration option "--mesos-default-pod-roles" defaulting to
"*" which defines the default pod roles in case the meta.RolesKey pod
label is missing.

cluster/mesos/docker/docker-compose.yml

@@ -23,7 +23,7 @@ mesosmaster1:
   - MESOS_QUORUM=1
   - MESOS_REGISTRY=in_memory
   - MESOS_WORK_DIR=/var/lib/mesos
-  - MESOS_ROLES=role1
+  - MESOS_ROLES=public
   links:
   - etcd
   - "ambassador:apiserver"
@@ -38,12 +38,13 @@ mesosslave:
   - >
     NAME=$$(cut -f2 -d/ <<<$${MESOSMASTER1_NAME}) &&
     N=$${NAME##*_} &&
+    PUBLIC_RESOURCES="$$(if [ $${N} = 2 ]; then echo ";cpus(public):2;mem(public):640;ports(public):[7000-7999]"; fi)" &&
     DOCKER_NETWORK_OFFSET=0.0.$${N}.0
     exec wrapdocker mesos-slave
     --work_dir="/var/tmp/mesos/$${N}"
-    --attributes="rack:$${N};gen:201$${N};role:role$${N}"
+    --attributes="rack:$${N};gen:201$${N}"
     --hostname=$$(getent hosts mesosslave | cut -d' ' -f1 | sort -u | tail -1)
-    --resources="cpus:4;mem:1280;disk:25600;ports:[8000-21099];cpus(role$${N}):1;mem(role$${N}):640;disk(role$${N}):25600;ports(role$${N}):[7000-7999]"
+    --resources="cpus:4;mem:1280;disk:25600;ports:[8000-21099]$${PUBLIC_RESOURCES}"
   command: []
   environment:
   - MESOS_MASTER=mesosmaster1:5050
@@ -144,7 +145,8 @@ scheduler:
     --mesos-executor-cpus=1.0
     --mesos-sandbox-overlay=/opt/sandbox-overlay.tar.gz
     --static-pods-config=/opt/static-pods
-    --mesos-roles=*,role1
+    --mesos-framework-roles=*,public
+    --mesos-default-pod-roles=*,public
     --v=4
     --executor-logv=4
     --profiling=true