EC2 Amazon：在没有JRE的情况下设置自动缩放工具环境吗？

Question

I am following this guide here: http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/UsingTheCommandLineTools.html

I don't have JRE, although I have Java 7 setup (I develop in Java). So, I believe that I am stuck on this step in the tutorial: export JAVA_HOME=/usr/local/jre (but my /usr/local does not have JRE.)

See information here:

lucas@lucas-ThinkPad-W520:~$ ls /usr/local/
bin  etc  games  include  lib  man  sbin  share  src
lucas@lucas-ThinkPad-W520:~$ which java
/usr/bin/java
lucas@lucas-ThinkPad-W520:~$ which jre
lucas@lucas-ThinkPad-W520:~$ 

Should I install JRE separately, or is there a way to configure my system to work with these auto-scaling tools?

Answer 1

You should not use as-cmd anymore. Please use AWS CLI . Here is the AWS CLI relevant autoscaling commands

The reason being, as-cmd is not maintained by Amazon anymore and all the old CLI features have been exported to AWS CLI . AWS CLI is a one stop shop for all the AWS Services unlike older CLIs where you had to install a separate CLI for individual services.

as-cmd is JAva based and hecne your question. However, AWS-CLI is python based and in my opinion (which is ofcourse subjective), It is bit faster than older JAva based AWS CLIs.

AWS CLI provides output in JSON format which is much more easier to parse.

BESIDES, You don't have to play with CLI for autoscaling. Now, you can do the same job via AWS Console .

Answer 2

Your best bet is to download JRE. http://www.oracle.com/technetwork/java/javase/downloads/index.html Bottom right of that page. Small download should be done within seconds. Hope this helps