Ansible (14) wait_for module, ansiblewait_for

Ansible (14) wait_for module, ansiblewait_for
Module description

When you use service to start tomcat or database, are they actually starting? Do you want to confirm this?
This is what the wait_for module does.Wait for a thing to happen and continue. It can wait for a port to be occupied, and then do the following, Or do another thing after a certain time-out.

Common Parameters

Parameter Name	Required?	Default Value	Option	Description
Connect_timeout	No	5		The waiting time before the next event occurs, in seconds.
Delay	No			Latency: the number of seconds before the next task.
Host	No	127.0.0.1		Host that executes this module
Path	No			If a file exists in the file system, the next step is to continue.
Port	No			Port number, such as 8080
State	No	Started	Present/started/stopped/absent	When the object is a port, the start State ensures that the port is opened, and the stoped State determines that the port is closed. When the object is a file, the present or started confirms that the file exists, the absent will confirm that the file does not exist.

Case

# Check port 8000 on the current host after 10 seconds until the port is started-wait_for: port = 8000 delay = 10 # Check path =/tmp/foo until the file exists-wait_for: path =/tmp/foo # Until/var/lock/file. after the lock is removed, continue-wait_for: path =/var/lock/file. lock state = absent # continue until/proc/3466/status is removed-wait_for: path =/proc/3466/status state = absent

All the modules used in the previous homework have been explained.