Check ansible version >=2.7.8

ansible-playbook -i inventory/mycluster/hosts.yml -e 'ansible_ssh_user=vagrant' -k --become --become-user=root cluster.yml
SSH password: 
 [WARNING]: Unable to parse /root/kubespray/inventory/mycluster/hosts.yml as an inventory source

 [WARNING]: No inventory was parsed, only implicit localhost is available

 [WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'


PLAY [localhost] *******************************************************************************************************************************

TASK [Check ansible version >=2.7.8] ***********************************************************************************************************
Tuesday 27 August 2019  07:26:29 +0000 (0:00:00.105)       0:00:00.105 ******** 
ok: [localhost] => {
    "changed": false, 
    "msg": "All assertions passed"
}
 [WARNING]: Could not match supplied host pattern, ignoring: bastion


PLAY [bastion[0]] ******************************************************************************************************************************
skipping: no hosts matched
 [WARNING]: Could not match supplied host pattern, ignoring: k8s-cluster

 [WARNING]: Could not match supplied host pattern, ignoring: etcd


PLAY [k8s-cluster:etcd] ************************************************************************************************************************
skipping: no hosts matched

PLAY [k8s-cluster:etcd] ************************************************************************************************************************
skipping: no hosts matched

PLAY [etcd] ************************************************************************************************************************************
skipping: no hosts matched

PLAY [k8s-cluster] *****************************************************************************************************************************
skipping: no hosts matched

PLAY [k8s-cluster] *****************************************************************************************************************************
skipping: no hosts matched
 [WARNING]: Could not match supplied host pattern, ignoring: kube-master


PLAY [kube-master] *****************************************************************************************************************************
skipping: no hosts matched

PLAY [k8s-cluster] *****************************************************************************************************************************
skipping: no hosts matched
 [WARNING]: Could not match supplied host pattern, ignoring: calico-rr


PLAY [calico-rr] *******************************************************************************************************************************
skipping: no hosts matched

PLAY [kube-master[0]] **************************************************************************************************************************
skipping: no hosts matched

PLAY [kube-master] *****************************************************************************************************************************
skipping: no hosts matched

PLAY [kube-master] *****************************************************************************************************************************
skipping: no hosts matched

PLAY [k8s-cluster] *****************************************************************************************************************************
skipping: no hosts matched

PLAY RECAP *************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0   

Tuesday 27 August 2019  07:26:29 +0000 (0:00:00.134)       0:00:00.240 ******** 
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Check ansible version >=2.7.8 ----------------------------------------------------------------------------------------------------------- 0.14s