Split deploy steps in separate playbooks: part1 (#3451)

* Fix bootstrap_os/ubuntu idempotency

* Update bastion role

* move container_engine in sub-roles

* requires ansible 2.5

* ubuntu18 as first CI job

.gitlab-ci.yml

@@ -42,7 +42,7 @@ before_script:
   tags:
     - kubernetes
     - docker
-  image: quay.io/kubespray/kubespray:latest
+  image: quay.io/kubespray/kubespray:v2.7
 
 .docker_service: &docker_service
   services:
@@ -323,12 +323,13 @@ before_script:
 
 # Builds for PRs only (premoderated by unit-tests step) and triggers (auto)
 ### PR JOBS PART1
-gce_coreos-calico-aio:
+
+gce_ubuntu18-flannel-aio:
   stage: deploy-part1
   <<: *job
   <<: *gce
   variables:
-    <<: *coreos_calico_aio_variables
+    <<: *ubuntu18_flannel_aio_variables
     <<: *gce_variables
   when: on_success
   except: ['triggers']
@@ -336,14 +337,14 @@ gce_coreos-calico-aio:
 
 ### PR JOBS PART2
 
-gce_ubuntu18-flannel-aio:
+gce_coreos-calico-aio:
   stage: deploy-part2
   <<: *job
   <<: *gce
   variables:
-    <<: *ubuntu18_flannel_aio_variables
+    <<: *coreos_calico_aio_variables
     <<: *gce_variables
-  when: manual
+  when: on_success
   except: ['triggers']
   only: [/^pr-.*$/]
 
@@ -358,7 +359,7 @@ gce_centos7-flannel-addons:
   except: ['triggers']
   only: [/^pr-.*$/]
 
-gce_centos-weave-kubeadm:
+gce_centos-weave-kubeadm-sep:
   stage: deploy-part2
   <<: *job
   <<: *gce
@@ -369,6 +370,8 @@ gce_centos-weave-kubeadm:
   except: ['triggers']
   only: [/^pr-.*$/]
 
+### MANUAL JOBS
+
 gce_ubuntu-weave-sep:
   stage: deploy-part2
   <<: *job
@@ -376,11 +379,10 @@ gce_ubuntu-weave-sep:
   variables:
     <<: *gce_variables
     <<: *ubuntu_weave_sep_variables
-  when: on_success
+  when: manual
   except: ['triggers']
   only: [/^pr-.*$/]
 
-### MANUAL JOBS
 gce_coreos-calico-sep-triggers:
   stage: deploy-part2
   <<: *job