overcame the kubeadm join race condition issue with serial: 1 role

kubernetes/kubeadm#335
kubevirt/kubevirt#292

roles/common/tasks/main.yaml

@@ -1,7 +1,20 @@
+- name: show ssh_host
+  debug:
+    msg: "{{ ansible_ssh_host }}"
+
+- name: show host
+  debug:
+    msg: "{{ ansible_host }}"
+
+#waiting for ssh is done in the openstack roles anyway ...
 # first timeout to wait for ssh to come available...
 # wait 300 seconds for port 22 to become open and contain "OpenSSH", don't assume the inventory_hostname is resolvable
 # and don't start checking for 10 seconds
-- local_action: wait_for port=22 host="{{ ansible_ssh_host | default(inventory_hostname) }}" search_regex=OpenSSH delay=10
+#- name: Wait for ssh to become available 
+#  local_action: 
+#    wait_for port="22" host="{{ ansible_ssh_host | default(inventory_hostname) }}" search_regex="OpenSSH" delay=10
+#  delegate_to: "{{ groups.master[0] }}"
+#  when: state == "present"
 
 #seems this is what ansible is instructed to do before instance is deemed ready (some gzip going on, taking quite some time...)
 - name: Wait for cloud-init to finish

roles/kubeadm-master/tasks/main.yaml

@@ -75,5 +75,5 @@
   become_user: centos
 
 #obsolete with kubernetes 1.7.1 https://github.com/kubevirt/kubevirt/pull/292
-#- name: Workaround kubeadm 1.7.0 race condition, see https://github.com/kubernetes/kubeadm/issues/335
-#  script: kubeadm-1-7-0-race-condition-workaround.sh
+- name: Workaround kubeadm 1.7.0 race condition, see https://github.com/kubernetes/kubeadm/issues/335
+  script: kubeadm-1-7-0-race-condition-workaround.sh

roles/kubeadm-nodes/tasks/main.yaml

@@ -1,6 +1,11 @@
-- name: Install a pod network
-  command: sh -c 'printenv'
-
+- name: show host
+  debug:
+    msg: "{{ ansible_host }}"
+
+- name: show token
+  debug:
+    msg: "{{ hostvars[groups.master[0]]['token'].stdout }}"
+
 - name: kubeadm join
   command: "kubeadm join --skip-preflight-checks --token {{ hostvars[groups.master[0]]['token'].stdout }} {{ hostvars[groups.master[0]]['ansible_default_ipv4']['address'] }}:6443"
   args:

site.yaml

@@ -41,7 +41,7 @@
     - bootstrap
   gather_facts: false
   roles:
-#    - common
+    - common
 
 - name: Install repo and packages
   hosts: all
@@ -61,9 +61,10 @@
 
 - name: k8s nodes setup
   hosts: nodes
-  become: true
+  serial: 1
   tags:
     - bootstrap
+  become: true
   roles:
     - kubeadm-nodes