arun@fedora:~/Projects/bingoarun/istio/install/ansible$ kubectl version
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.2", GitCommit:"81753b10df112992bf51bbc2c2f85208aad78335", GitTreeState:"clean", BuildDate:"2018-04-27T09:22:21Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:44:10Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}

arun@fedora:~/Projects/bingoarun/istio/install/ansible$ ansible --version
ansible 2.5.3
  config file = /home/arun/Projects/bingoarun/istio/install/ansible/ansible.cfg
  configured module search path = [u'/home/arun/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.15rc1 (default, Apr 15 2018, 21:51:34) [GCC 7.3.0]

arun@fedora:~/Projects/bingoarun/istio/install/ansible$ ansible-playbook main.yml -e '{"cluster_flavour": "k8s"}' -vvv

TASK [istio : assert] *******************************************************************************************************************************
fatal: [localhost]: FAILED! => {
    "assertion": "vo.stdout >= minimum_cluster_version", 
    "changed": false, 
    "evaluated_to": false, 
    "msg": "Cluster version must be at least 1.7.0"
}
	to retry, use: --limit @/home/arun/Projects/bingoarun/istio/install/ansible/main.retry

TASK [istio : Extract server version] ***************************************************************************************************************
task path: /home/arun/Projects/bingoarun/istio/install/ansible/istio/tasks/main.yml:22
Using module file /usr/lib/python2.7/dist-packages/ansible/modules/commands/command.py
<127.0.0.1> ESTABLISH LOCAL CONNECTION FOR USER: arun
<127.0.0.1> EXEC /bin/sh -c 'echo ~arun && sleep 0'
<127.0.0.1> EXEC /bin/sh -c '( umask 77 && mkdir -p "` echo /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266 `" && echo ansible-tmp-1528456955.52-107553329050266="` echo /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266 `" ) && sleep 0'
<127.0.0.1> PUT /home/arun/.ansible/tmp/ansible-local-28063mc3_IW/tmpOhYjri TO /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266/command.py
<127.0.0.1> EXEC /bin/sh -c 'chmod u+x /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266/ /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266/command.py && sleep 0'
<127.0.0.1> EXEC /bin/sh -c '/usr/bin/python2 /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266/command.py && sleep 0'
<127.0.0.1> EXEC /bin/sh -c 'rm -f -r /home/arun/.ansible/tmp/ansible-tmp-1528456955.52-107553329050266/ > /dev/null 2>&1 && sleep 0'
changed: [localhost] => {
    "changed": true, 
    "cmd": "kubectl version | sed -En \"s/Server Version.*GitVersion.*v([[:digit:]]\\.[[:digit:]]\\.[[:digit:]]).*/\\1/p\" | tail -1", 
    "delta": "0:00:00.099051", 
    "end": "2018-06-08 16:52:35.755299", 
    "invocation": {
        "module_args": {
            "_raw_params": "kubectl version | sed -En \"s/Server Version.*GitVersion.*v([[:digit:]]\\.[[:digit:]]\\.[[:digit:]]).*/\\1/p\" | tail -1", 
            "_uses_shell": true, 
            "chdir": null, 
            "creates": null, 
            "executable": null, 
            "removes": null, 
            "stdin": null, 
            "warn": true
        }
    }, 
    "rc": 0, 
    "start": "2018-06-08 16:52:35.656248", 
    "stderr": "", 
    "stderr_lines": [], 
    "stdout": "", 
    "stdout_lines": []
}

TASK [istio : print vo] *****************************************************************************************************************************
task path: /home/arun/Projects/bingoarun/istio/install/ansible/istio/tasks/main.yml:27
ok: [localhost] => {
    "vo": {
        "changed": true, 
        "cmd": "kubectl version | sed -En \"s/Server Version.*GitVersion.*v([[:digit:]]\\.[[:digit:]]\\.[[:digit:]]).*/\\1/p\" | tail -1", 
        "delta": "0:00:00.099051", 
        "end": "2018-06-08 16:52:35.755299", 
        "failed": false, 
        "rc": 0, 
        "start": "2018-06-08 16:52:35.656248", 
        "stderr": "", 
        "stderr_lines": [], 
        "stdout": "", 
        "stdout_lines": []
    }
}

TASK [istio : assert] *******************************************************************************************************************************
task path: /home/arun/Projects/bingoarun/istio/install/ansible/istio/tasks/main.yml:31
fatal: [localhost]: FAILED! => {
    "assertion": "vo.stdout >= minimum_cluster_version", 
    "changed": false, 
    "evaluated_to": false, 
    "msg": "Cluster version must be at least 1.7.0"
}
	to retry, use: --limit @/home/arun/Projects/bingoarun/istio/install/ansible/main.retry