使用jq解析AWS CLI的json输出

Question

我想使用jq(http://stedolan.github.io/jq/)来解析来自aws elb describe-load-balancers的json输出,并仅在AvailabilityZones包含特定值的地方返回名称和AZ.

这是代表源输出的部分编辑的json:

{
  "LoadBalancerDescriptions": [
    {
    {
      "AvailabilityZones": [
        "us-east-1b",
        "us-east-1c",
        "us-east-1d"
      ],
      "CanonicalHostedZoneName": "example.us-east-1.elb.amazonaws.com",

在指定AvailabilityZones键的完整值列表时,我只能使其工作.

$ aws elb describe-load-balancers --region us-east-1 |jq '.LoadBalancerDescriptions[] | select(.AvailabilityZones == ["us-east-1b", "us-east-1c", "us-east-1d"]) | .CanonicalHostedZoneName, .AvailabilityZones'

上面的工作,但我想只选择它是否包含"us-east-1b"的值,而不管其他值.

Answer 1

也许这可行:

aws elb describe-load-balancers --region us-east-1 | jq '.LoadBalancerDescriptions[] | select((.AvailabilityZones[] | select(. == "us-east-1b")) == "us-east-1b") | .CanonicalHostedZoneName, .AvailabilityZones'

我实际测试了这样的输入:

{
  "LoadBalancerDescriptions": [
    {
      "AvailabilityZones": [
        "us-east-1b",
        "us-east-1c",
        "us-east-1d"
      ]
    }
  ]
}

并运行此命令:

jq '.LoadBalancerDescriptions[] | select((.AvailabilityZones[] | select(. == "us-east-1b")) == "us-east-1b")' input_file

然后我得到了:

{
  "AvailabilityZones": [
    "us-east-1b",
    "us-east-1c",
    "us-east-1d"
  ]
}

另一个输入:

{
  "LoadBalancerDescriptions": [
    {
      "AvailabilityZones": [
        "us-east-1b",
        "us-east-1c",
        "us-east-1d"
      ]
    },
    {
      "AvailabilityZones": [
        "us-east-1b",
        "us-east-1c"
      ]
    },
    {
      "AvailabilityZones": [
        "us-east-1d"
      ]
    }
  ]
}

输出:

{
  "AvailabilityZones": [
    "us-east-1b",
    "us-east-1c",
    "us-east-1d"
  ]
}
{
  "AvailabilityZones": [
    "us-east-1b",
    "us-east-1c"
  ]
}

您可能可以使用该概念来验证表示数组的键是否包含类似的元素.