Question

我正在尝试使用以下查询提取有关我的某些 ELB 实例的一些相关信息

aws elb describe-load-balancers --load-balancer-name my-elb \
 --query 'LoadBalancerDescriptions[*].[LoadBalancerName, DNSName, Scheme ,\
 SourceSecurityGroup.GroupName , SecurityGroups, Instances[*].InstanceId ]

输出如下

- - - my-elb
    - my-elb-15451562.us-east-1.elb.amazonaws.com
    - internet-facing
    - my-elb-sg
    - - sg-ef113b0d
    - - i-00633c0d3a103b3e9

我的问题是：当我执行 --output text 时，最后两个元素各自以单独的行结束。这会破坏 TSV 格式和随后的 LibreCalc 输入。

如何防止这种情况发生，以便 TSV 的导入显示在一行上？

Answer 1

问题在于 ELB 和实例之间存在一对多关系。一个 ELB 可以链接多个实例。这使得难以显示为 CSV/TSV，因为列数是可变的。

如果您知道有一个固定数量的实例总是与该 ELB 相关联，那么您可以将查询更改为：

aws elb describe-load-balancers --load-balancer-name my-elb \
 --query 'LoadBalancerDescriptions[*].[LoadBalancerName, DNSName, Scheme ,\
 SourceSecurityGroup.GroupName , SecurityGroups, Instances[0].InstanceId, Instances[1].InstanceId ]

Answer 2

通过管道传递粘贴命令 | paste -d"\t" -s

，我能够得到我想要的结果

当有未知的新行时，我想知道有 SED 或 AWK 解决方案吗？

Answer 3

您实际上可以通过创建一个人工数组来解决这个问题，然后在这个人工数组上使用 flatten operator — [] —。

给定 JSON：

{
  "LoadBalancerDescriptions": [
    {
      "Subnets": [
          "subnet-15aaab61"
      ],
      "CanonicalHostedZoneNameID": "Z3DZXE0EXAMPLE",
      "CanonicalHostedZoneName": "my-load-balancer-1234567890.us-west-2.elb.amazonaws.com",
      "ListenerDescriptions": [
          {
              "Listener": {
                  "InstancePort": 80,
                  "LoadBalancerPort": 80,
                  "Protocol": "HTTP",
                  "InstanceProtocol": "HTTP"
              },
              "PolicyNames": []
          },
          {
              "Listener": {
                  "InstancePort": 443,
                  "SSLCertificateId": "arn:aws:iam::123456789012:server-certificate/my-server-cert",
                  "LoadBalancerPort": 443,
                  "Protocol": "HTTPS",
                  "InstanceProtocol": "HTTPS"
              },
              "PolicyNames": [
                  "ELBSecurityPolicy-2015-03"
              ]
          }
      ],
      "HealthCheck": {
          "HealthyThreshold": 2,
          "Interval": 30,
          "Target": "HTTP:80/png",
          "Timeout": 3,
          "UnhealthyThreshold": 2
      },
      "VPCId": "vpc-a01106c2",
      "BackendServerDescriptions": [
          {
              "InstancePort": 80,
              "PolicyNames": [
                  "my-ProxyProtocol-policy"
              ]
          }
      ],
      "Instances": [
          {
              "InstanceId": "i-207d9717"
          },
          {
              "InstanceId": "i-afefb49b"
          }
      ],
      "DNSName": "my-load-balancer-1234567890.us-west-2.elb.amazonaws.com",
      "SecurityGroups": [
          "sg-a61988c3"
      ],
      "Policies": {
          "LBCookieStickinessPolicies": [
              {
                  "PolicyName": "my-duration-cookie-policy",
                  "CookieExpirationPeriod": 60
              }
          ],
          "AppCookieStickinessPolicies": [],
          "OtherPolicies": [
              "my-PublicKey-policy",
              "my-authentication-policy",
              "my-SSLNegotiation-policy",
              "my-ProxyProtocol-policy",
              "ELBSecurityPolicy-2015-03"
          ]
      },
      "LoadBalancerName": "my-load-balancer",
      "CreatedTime": "2015-03-19T03:24:02.650Z",
      "AvailabilityZones": [
          "us-west-2a"
      ],
      "Scheme": "internet-facing",
      "SourceSecurityGroup": {
          "OwnerAlias": "123456789012",
          "GroupName": "my-elb-sg"
      }
    }
  ]
}

^{以https://docs.aws.amazon.com/cli/latest/reference/elb/describe-load-balancers.html#examples}

为例

查询：

LoadBalancerDescriptions[*].[ [LoadBalancerName, DNSName, Scheme, SourceSecurityGroup.GroupName, SecurityGroups, Instances[*].InstanceId][] ]

将产生 JSON

[
  [
    [
      "my-load-balancer",
      "my-load-balancer-1234567890.us-west-2.elb.amazonaws.com",
      "internet-facing",
      "my-elb-sg",
      "sg-a61988c3",
      "i-207d9717",
      "i-afefb49b"
    ]
  ]
]

相当于 YAML

- - - my-load-balancer
    - my-load-balancer-1234567890.us-west-2.elb.amazonaws.com
    - internet-facing
    - my-elb-sg
    - sg-a61988c3
    - i-207d9717
    - i-afefb49b

根据需要，您可以根据需要进一步展平：

LoadBalancerDescriptions[*].[ [LoadBalancerName, DNSName, Scheme, SourceSecurityGroup.GroupName, SecurityGroups, Instances[*].InstanceId][] ][]

给予

- - my-load-balancer
  - my-load-balancer-1234567890.us-west-2.elb.amazonaws.com
  - internet-facing
  - my-elb-sg
  - sg-a61988c3
  - i-207d9717
  - i-afefb49b

和

LoadBalancerDescriptions[*].[ [LoadBalancerName, DNSName, Scheme, SourceSecurityGroup.GroupName, SecurityGroups, Instances[*].InstanceId][] ][][]

给予

- my-load-balancer
- my-load-balancer-1234567890.us-west-2.elb.amazonaws.com
- internet-facing
- my-elb-sg
- sg-a61988c3
- i-207d9717
- i-afefb49b

aws ec2 文本输出打印在多行上

3 个答案: