ecsHostName

Windows system: length of 2 to 15 characters, allowing the use of upper and lower case letters, numbers. You cannot use only numbers. Other operating systems (such as Linux): the length of 2 to 64 characters, allowing the use of dot (.) to separate characters into multiple segments, each segment allows the use of upper and lower case letters, numbers, but can not use continuous dot (.). Cannot start or end with a dot (.).