如何在CLI上获取ec2实例状态? [英] How to get ec2 instance state at CLI?

问题描述

我可以看到我的实例:

$ aws ec2 describe-instances --output text
RESERVATIONS    193693970645    r-06e25c9702ca1a586
INSTANCES       0       x86_64          False   True    xen     ami-00c03f7f7f2ec15c3   i-03006b8712ac593f9     t2.micro        mdaws   2019-10-11T12:08:56.000Z                    /dev/xvda       ebs     User initiated (2019-10-11 12:51:09 GMT)        hvm
CAPACITYRESERVATIONSPECIFICATION        open
CPUOPTIONS      1       1
HIBERNATIONOPTIONS      False
MONITORING      disabled
PLACEMENT       us-east-2c              default
STATE   48      terminated
STATEREASON     Client.UserInitiatedShutdown    Client.UserInitiatedShutdown: User initiated shutdown

但是当我只需要几个字段时，如何选择终止代码(48)或描述(终止)?

but how can I pick out the termination code (48) or description (terminated) when I just want a few fields ?

我尝试了一些事情，包括:

I have tried a few things including:

$ aws ec2 describe-instances --query "Reservations[*].Instances[*].[InstanceId, ImageId, State]" --output text

'str' object has no attribute 'items'

$ aws ec2 describe-instances --query "Reservations[*].Instances[*].[InstanceId, ImageId, State[*]]" --output text
i-03006b8712ac593f9     ami-00c03f7f7f2ec15c3   None

$ aws ec2 describe-instances --query "Reservations[*].Instances[*].[InstanceId, ImageId, State[*].[Code]]" --output text
i-03006b8712ac593f9     ami-00c03f7f7f2ec15c3   None

$ aws ec2 describe-instances --query "Reservations[*].Instances[*].[InstanceId, ImageId, State[*].[Code[*]]]" --output text
i-03006b8712ac593f9     ami-00c03f7f7f2ec15c3   None

推荐答案

格式为 [InstanceId，ImageId，State.Code，State.Name] ，即

$ aws ec2 describe-instances \
--query "Reservations[*].Instances[*].[InstanceId, ImageId, State.code, State.Name]" --o text

在此示例中的输出:

i-03006b8712ac593f9     ami-00c03f7f7f2ec15c3   48    terminated

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