7

我想使用 jq ( http://stedolan.github.io/jq/ ) 解析来自 aws elb describe-load-balancers 的 json 输出，并仅在 AvailabilityZones 包含特定值的情况下返回名称和可用区。

这是表示源输出的部分编辑 json：

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

只有在为 AvailabilityZones 键指定完整的值列表时，我才能让它工作。

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

以上工作，但我只想选择它是否包含“us-east-1b”的值，而不考虑其他值。

4

1 回答 1

5

也许这可以工作：

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

我实际上用这样的输入进行了测试：

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

并运行以下命令：

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

然后我得到：

{
  "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。

于 2013-09-13T23:59:55.710 回答