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Mcar49's questions

Martin Hope
Mcar49
Asked: 2019-11-22 01:38:51 +0800 CST
  • 4

我有一个 json 文件，其中包含大量 AWS CloudWatch 日志（从 CLI 命令生成）。我正在尝试使用 jq仅返回没有“retentionInDays”字段的条目的值。我有以下内容，可以根据需要返回所有内容，但我似乎无法过滤掉确实具有保留时间的结果。

# Working output (unfiltered)
jq ".logGroups[] | { log_name: .logGroupName, log_arn: .arn, retention_scheme: .retentionInDays }" cwlogs.json

我已经尝试了几件事，但要么得到错误，要么完成并且什么也不输出：

# Doesn't return anything
jq '.logGroups[] | { log_name: .logGroupName, log_arn: .arn, retention_scheme: select(.retentionInDays | contains ("null")?) }' cwlogs.json

# Errors with "jq: error (at cwlogs.json:760): number (7) and string ("null") cannot have their containment checked"
jq '.logGroups[] | { log_name: .logGroupName, log_arn: .arn, retention_scheme: select(.retentionInDays | contains ("null")) }' cwlogs.json

# Hangs forever
jq '.logGroups[] | select(.retentionInDays != "null").type'

更新：我正在使用的 JSON 的可测试段

{
    "logGroups": [
        {
            "storedBytes": 0,
            "metricFilterCount": 0,
            "creationTime": 1234,
            "logGroupName": "/aws/elasticbeanstalk/docker",
            "retentionInDays": 7,
            "arn": "longarnhere"
        },
        {
            "storedBytes": 0,
            "metricFilterCount": 0,
            "creationTime": 1245,
            "logGroupName": "/aws/elasticbeanstalk/nginx",
            "arn": "longarnhere"
        }
    ]
}
linux aws