Amazon web services 如何在aws rds descripe db instances命令中使用--query参数
下面是描述数据库实例的概要Amazon web services 如何在aws rds descripe db instances命令中使用--query参数,amazon-web-services,aws-cli,Amazon Web Services,Aws Cli,下面是描述数据库实例的概要 [--db-instance-identifier <value>] [--filters <value>] [--cli-input-json <value>] [--starting-token <value>] [--page-size <value>] [--max-items <value>] [--generate-cli-skeleton <value>]
[--db-instance-identifier <value>]
[--filters <value>]
[--cli-input-json <value>]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]
语法是什么
在大多数aws cli命令中都可以使用--query'DBInstances[*.[DBInstanceArn,Engine,DBInstanceIdentifier]
的--query
参数。它帮助您控制命令执行的输出。您可能想了解它的工作原理
对于aws rds Descripte db instances
(您可以检查或运行aws rds Descripte db instances help
,以了解输出值),执行该命令将为您运行的每个db返回一长串db属性:
{
"DBInstances": [
{
"PubliclyAccessible": true,
"MasterUsername": "TestDB",
"MonitoringInterval": 0,
"LicenseModel": "general-public-license",
"VpcSecurityGroups": [
{
"Status": "active",
"VpcSecurityGroupId": "sg-5a69722b"
}
],
"CopyTagsToSnapshot": false,
"OptionGroupMemberships": [
{
"Status": "in-sync",
"OptionGroupName": "default:mysql-5-6"
}
],
"PendingModifiedValues": {
"MasterUserPassword": "****"
},
"Engine": "mysql",
"MultiAZ": false,
"DBSecurityGroups": [],
"DBParameterGroups": [
{
"DBParameterGroupName": "default.mysql5.6",
"ParameterApplyStatus": "in-sync"
}
],
"AutoMinorVersionUpgrade": false,
"PreferredBackupWindow": "06:52-07:22",
"DBSubnetGroup": {
"Subnets": [
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-50dea718",
"SubnetAvailabilityZone": {
"Name": "us-east-1d"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-c5bba9a0",
"SubnetAvailabilityZone": {
"Name": "us-east-1b"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-5ff24a05",
"SubnetAvailabilityZone": {
"Name": "us-east-1a"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-98a39da4",
"SubnetAvailabilityZone": {
"Name": "us-east-1e"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-42b42c4e",
"SubnetAvailabilityZone": {
"Name": "us-east-1f"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet-4d28a961",
"SubnetAvailabilityZone": {
"Name": "us-east-1c"
}
}
],
"DBSubnetGroupName": "default",
"VpcId": "vpc-1b70fd62",
"DBSubnetGroupDescription": "default",
"SubnetGroupStatus": "Complete"
},
"ReadReplicaDBInstanceIdentifiers": [],
"AllocatedStorage": 5,
"DBInstanceArn": "arn:aws:rds:us-east-1:325979260958:db:testdb",
"BackupRetentionPeriod": 0,
"DBName": "TestDB",
"PreferredMaintenanceWindow": "wed:10:19-wed:10:49",
"DBInstanceStatus": "creating",
"IAMDatabaseAuthenticationEnabled": false,
"EngineVersion": "5.6.35",
"AvailabilityZone": "us-east-1e",
"DomainMemberships": [],
"StorageType": "gp2",
"DbiResourceId": "db-5VK47WZ6OTS5VEA7OJUF4XH5OI",
"CACertificateIdentifier": "rds-ca-2015",
"StorageEncrypted": false,
"DBInstanceClass": "db.t2.micro",
"DbInstancePort": 0,
"DBInstanceIdentifier": "testdb"
}
]
}
您可能对所有这些元素都不感兴趣,但希望具体了解列表的子部分。此时,您将使用--query
参数指定属性
我可以通过运行以下命令将元素数限制为DBInstanceArn
、引擎
和DBInstanceIdentifier
$ aws rds describe-db-instances --query 'DBInstances[*].[DBInstanceArn,Engine,DBInstanceIdentifier]'
[
[
"arn:aws:rds:us-east-1:325979260958:db:testdb",
"mysql",
"testdb"
]
]
查询
参数中使用的语法为。由于该命令的输出是一个JSon文档,它可以帮助您解析它。如何使用“aws rds descripe db instances--query”?欢迎使用StackOverflow!不幸的是,你的问题不清楚。请编辑您的问题,并让我们知道您正在努力完成什么,到目前为止您尝试了什么,以及您遇到了哪些错误。有关提问的技巧,请参阅:你只是在问吗?弗雷德里克,非常感谢你的大力帮助。我非常感激。
$ aws rds describe-db-instances --query 'DBInstances[*].[DBInstanceArn,Engine,DBInstanceIdentifier]'
[
[
"arn:aws:rds:us-east-1:325979260958:db:testdb",
"mysql",
"testdb"
]
]