CommentConfig add `#` to the head of each lines for imported configs.

GetHostPort tries to read the SSH port of the host.

ImportConfig copies config files from cluster which deployed through tidb-ansible.

LoadConfig files to clusterMeta, include tidbservers, tikvservers, pdservers pumpservers and drainerservers.

ParseAndImportInventory builds a basic ClusterMeta from the main Ansible inventory.

ReadInventory reads the inventory files of a TiDB cluster deployed by TiDB-Ansible.

SSHKeyPath gets the path to default SSH private key, this is the key Ansible uses to connect deployment servers.

AnsibleConfigFile is the default ansible config file name.

AnsibleInventoryFile is the default inventory file name.