使用 ansible 的 shell 模块的 stdin 参数可能出现的引用问题 [英] Probable quoting issue using the stdin argument of ansible's shell module

问题描述

我有一个包含以下任务的剧本:

I've got a playbook with the following tasks:

- set_fact:
    asg_filter: >
      .AutoScalingGroups[] |
      select(.Tags[] | select(.Key == "Role").Value == "myrole")
- shell: aws autoscaling --region us-west-2 describe-auto-scaling-groups | jq --compact-output "{{ asg_filter }}"
  register: asgs_result
- set_fact:
    stale_instance_filter: >
      .LaunchConfigurationName as $lc |
      .Instances[] |
      select(.LaunchConfigurationName != $lc) |
      .InstanceId

现在我想在 asgs_result.stdout 上使用 stale_instance_filter.以下工作:

Now I want to use stale_instance_filter on asgs_result.stdout. The following works:

- shell: echo '{{ asgs_result.stdout }}' | jq -r '{{ stale_instance_filter }}'

但这不会:

- shell: jq -r '{{ stale_instance_filter }}'
  args:
    stdin: "{{ asgs_result.stdout }}"

我收到以下错误消息:parse error: Invalid numeric literal at line 1, column 23(我认为来自 ARN 中 ASG 的帐号.)我认为这是一个引用问题(可能是关于 JSON 中的双引号)，但我也试过 asgs_result.stdout |引用 无济于事.我还尝试了 command 模块；它也没有帮助.当然，如果我直接在 CLI 上执行，这一切都有效.

I get the following error message: parse error: Invalid numeric literal at line 1, column 23 (which I believe is from the account number in the ARN for the ASG.) I think it's a quoting issue (maybe something about the double quotes in the JSON), but I've also tried asgs_result.stdout | quote to no avail. I also tried the command module; it didn't help either. Of course this all works if I do it directly on the CLI.

我意识到我可以组合两个 jq 过滤器，但我想将 asgs_result 重用于其他事情，并且不想多次进行查询.我该如何解决这个问题，以便我可以使用 stdin 参数?

I realize I could combine the two jq filters but I want to reuse asgs_result for other things and don't want to have to make the query multiple times. How can I fix this so I can use the stdin argument?

我被要求提供一个 asgs_result 的值的例子，你去吧，这是其中的 stdout 属性(因为我不使用其他任何东西):

I was asked to provide an example of the value of asgs_result, well here you go, here's the stdout attribute in it (since I don't use anything else):

"stdout": "{\"AutoScalingGroupARN\":\"arn:aws:autoscaling:us-east-2:123456:autoScalingGroup:e75a213b-75fe-467c-8cf5-d7c51f76c471:autoScalingGroupName/myrole-dev\",\"TargetGroupARNs\":[],\"SuspendedProcesses\":[],\"DesiredCapacity\":4,\"Tags\":[{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"dev\",\"Key\":\"Dimension\"},{\"ResourceType\":\"auto-scaling-group\",\"ResouJceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"true\",\"Key\":\"Monitored\"},{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"myrole\",\"Key\":\"Name\"},{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"myrole\",\"Key\":\"Role\"},{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"2035-09-30 18:55:31 +0000\",\"Key\":\"cleaner-destroy-after\"},{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"vpce-2c23ca45\",\"Key\":\"force_s3_endpoint_dependency\"},{\"ResourceType\":\"auto-scaling-group\",\"ResourceId\":\"myrole-dev\",\"PropagateAtLaunch\":true,\"Value\":\"owned\",\"Key\":\"kubernetes.io/cluster/dev\"}],\"EnabledMetrics\":[],\"LoadBalancerNames\":[],\"AutoScalingGroupName\":\"myrole-dev\",\"DefaultCooldown\":300,\"MinSize\":4,\"Instances\":[{\"ProtectedFromScaleIn\":false,\"AvailabilityZone\":\"us-east-2b\",\"InstanceId\":\"i-0141fd35e3cf3ad0a\",\"HealthStatus\":\"Healthy\",\"LifecycleState\":\"InService\",\"LaunchConfigurationName\":\"dev_myrole_20180511171410107500000002\"},{\"ProtectedFromScaleIn\":false,\"AvailabilityZone\":\"us-east-2c\",\"InstanceId\":\"i-01aec2b3546d75190\",\"HealthStatus\":\"Healthy\",\"LifecycleState\":\"InService\",\"LaunchConfigurationName\":\"dev_myrole_20180511171410107500000002\"},{\"ProtectedFromScaleIn\":false,\"AvailabilityZone\":\"us-east-2a\",\"InstanceId\":\"i-0830b227f034d2859\",\"HealthStatus\":\"Healthy\",\"LifecycleState\":\"InService\",\"LaunchConfigurationName\":\"dev_myrole_20180511171410107500000002\"},{\"ProtectedFromScaleIn\":false,\"AvailabilityZone\":\"us-east-2b\",\"InstanceId\":\"i-0f7d847e8c168040b\",\"HealthStatus\":\"Healthy\",\"LifecycleState\":\"InService\",\"LaunchConfigurationName\":\"dev_myrole_20180511171410107500000002\"}],\"MaxSize\":4,\"VPCZoneIdentifier\":\"subnet-c348988e,subnet-79743210,subnet-156ee36e\",\"HealthCheckGracePeriod\":300,\"TerminationPolicies\":[\"Default\"],\"LaunchConfigurationName\":\"dev_myrole_20180511171410107500000002\",\"CreatedTime\":\"2018-02-20T22:35:32.183Z\",\"AvailabilityZones\":[\"us-east-2a\",\"us-east-2b\",\"us-east-2c\"],\"HealthCheckType\":\"EC2\",\"NewInstancesProtectedFromScaleIn\":false}"

抱歉，所有内容都在一行上，但我不想让任何人认为那里有换行符，因为没有.

Sorry that it is all on one line but I don't want to make anyone think there is a newline in there, because there isn't.

推荐答案

JSON 内容似乎在发送到 stdin 之前被解释过，所以看起来像简单的引号被发送(在详细模式下看到 -vvv):

The JSON content seems to be interpreted before sent to the stdin, so looks like simple quotes are sent (seen in verbose mode with -vvv):

"stdin": "{'AutoScalingGroupARN': 'arn:aws:autoscaling:us-east-2:123456:autoScalin
gGroup:e75a213b-75fe-467c-8cf5-d7c51f76c471:autoScalingGroupName/myrole-dev', ...,
 'AvailabilityZones': ['us-east-2a', 'us-east-2b', 'us-east-2c']}"

JSON 无效:

$ echo "{'AutoScalingGroupARN': 'arn:aws:autoscaling:us-east-2:123456:autoScalingGroup:e75a213b-75fe-467c-8cf5-d7c51f76c471:autoScalingGroupName/myrole-dev', 'HealthCheckGracePeriod': 300}" | jq
parse error: Invalid numeric literal at line 1, column 23

$ echo '{"AutoScalingGroupARN": "arn:aws:autoscaling:us-east-2:123456:autoScalingGroup:e75a213b-75fe-467c-8cf5-d7c51f76c471:autoScalingGroupName/myrole-dev", "HealthCheckGracePeriod": 300}' | jq
{
  "AutoScalingGroupARN": "arn:aws:autoscaling:us-east-2:123456:autoScalingGroup:e75a213b-75fe-467c-8cf5-d7c51f76c471:autoScalingGroupName/myrole-dev",
  "HealthCheckGracePeriod": 300
}

所以，你需要逃避"它.不幸的是，to_json 过滤器，逃脱了很多:

So, you need to "escape" it. Unfortunately, the to_json filter, escape to much:

"stdin": "\"{\\\"AutoScalingGroupARN\\\":\\\"arn:aws:autosca...

但是 string 过滤器非常适合:

But the string filter fits perfectly:

"stdin": "{\"AutoScalingGroupARN\":\"arn:aws:autosca...

所以，stdin 的正确方法是这样的:

So, the correct way with stdin is this:

- shell: jq -r '{{ stale_instance_filter }}'
  args:
    stdin: "{{ asgs_result.stdout | string }}"

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