【发布时间】：2016-08-05 10:27:30
【问题描述】：
我在这篇文章的底部有一些（编辑过的）JSON，这是在 AWS 中运行 ec2-describe-instances 的结果。示例 JSON 有 2 个数组，但是这可能更大。我以前使用过 jq，但我无法提取深度嵌套在 JSON 中的值。我特别感兴趣的是：
- InstanceId ["Reservations": ["Instances": ["InstanceId":
- DeviceName [“Reservations”：[“Instances”：[“BlockDeviceMappings”：[“DeviceName”：
- VolumeId [“Reservations”：[“Instances”：[“BlockDeviceMappings”：[“Ebs”：{“VolumeId”：
- TAG1 值/键
- TAG2 值/键
总之，我想要一个可以迭代的 JSON 数组，它将给我一个 InstanceID、该实例上的标签和一个 single 卷。您会注意到每个实例都附加了 3 个卷（可能更多，也可能更少）。我希望能够单独迭代每一个。我希望的最终结果是这样的：
[
{
"InstanceId": "i-11111111",
"DeviceName": "/dev/sda1",
"VolumeId": "vol-1111111a",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
},
{
"InstanceId": "i-11111111",
"DeviceName": "xvdf",
"VolumeId": "vol-1111111b",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
},
{
"InstanceId": "i-11111111",
"DeviceName": "xvdg",
"VolumeId": "vol-1111111c",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
},
{
"InstanceId": "i-22222222",
"DeviceName": "/dev/sda1",
"VolumeId": "vol-2222222a",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
},
{
"InstanceId": "i-22222222",
"DeviceName": "/dev/sdb",
"VolumeId": "vol-2222222b",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
},
{
"InstanceId": "i-22222222",
"DeviceName": "/dev/sdc",
"VolumeId": "vol-2222222c",
"TAG1": "VALUE1",
"TAG2": "VALUE2"
}
]
这类似于我发布的另一个问题here on stackoverflow。我尝试了很多不同的组合，但无法让它发挥作用。非常感谢任何帮助。
这是 JSON：
{
"Reservations": [
{
"OwnerId": "xx",
"ReservationId": "xx",
"Groups": [],
"Instances": [
{
"Monitoring": {
"State": "xx"
},
"PublicDnsName": "",
"Platform": "xx",
"State": {
"Code": xx,
"Name": "xx"
},
"EbsOptimized": xx,
"LaunchTime": "xx",
"PrivateIpAddress": "xx",
"ProductCodes": [],
"VpcId": "xx",
"StateTransitionReason": "",
"InstanceId": "i-11111111",
"ImageId": "xx",
"PrivateDnsName": "xx",
"KeyName": "xx",
"SecurityGroups": [
{
"GroupName": "xx",
"GroupId": "xx"
},
{
"GroupName": "xx",
"GroupId": "xx"
}
],
"ClientToken": "xx",
"SubnetId": "xx",
"InstanceType": "xx",
"NetworkInterfaces": [
{
"Status": "xx",
"MacAddress": "xx",
"SourceDestCheck": xx,
"VpcId": "xx",
"Description": "xx",
"NetworkInterfaceId": "xx",
"PrivateIpAddresses": [
{
"PrivateDnsName": "xx",
"Primary": xx,
"PrivateIpAddress": "xx"
}
],
"PrivateDnsName": "xx",
"Attachment": {
"Status": "xx",
"DeviceIndex": xx,
"DeleteOnTermination": xx,
"AttachmentId": "xx",
"AttachTime": "xx"
},
"Groups": [
{
"GroupName": "xx",
"GroupId": "xx"
},
{
"GroupName": "xx",
"GroupId": "xx"
}
],
"SubnetId": "xx",
"OwnerId": "xx",
"PrivateIpAddress": "xx"
}
],
"SourceDestCheck": xx,
"Placement": {
"Tenancy": "xx",
"GroupName": "xx",
"AvailabilityZone": "xx"
},
"Hypervisor": "xx",
"BlockDeviceMappings": [
{
"DeviceName": "/dev/sda1",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-1111111a",
"AttachTime": "xx"
}
},
{
"DeviceName": "xvdf",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-1111111b",
"AttachTime": "xx"
}
},
{
"DeviceName": "xvdg",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-11111111c",
"AttachTime": "xx"
}
}
],
"Architecture": "xx",
"RootDeviceType": "xx",
"RootDeviceName": "xx",
"VirtualizationType": "hvm",
"Tags": [
{
"Value": "TAG1",
"Key": "VALUE1"
},
{
"Value": "TAG2",
"Key": "VALUE2"
},
{
"Value": "TAG3",
"Key": "VALUE3"
},
{
"Value": "TAG4",
"Key": "VALUE4"
},
{
"Value": "TAG5",
"Key": "VALUE5"
},
{
"Value": "TAG6",
"Key": "Value6"
}
],
"AmiLaunchIndex": xx
}
]
},
{
"OwnerId": "xx",
"ReservationId": "xx",
"Groups": [],
"Instances": [
{
"Monitoring": {
"State": "xx"
},
"PublicDnsName": "",
"Platform": "xx",
"State": {
"Code": xx,
"Name": "xx"
},
"EbsOptimized": xx,
"LaunchTime": "xx",
"PrivateIpAddress": "xx",
"ProductCodes": [],
"VpcId": "xx",
"StateTransitionReason": "",
"InstanceId": "i-22222222",
"ImageId": "xx",
"PrivateDnsName": "xx",
"KeyName": "xx",
"SecurityGroups": [
{
"GroupName": "xx",
"GroupId": "xx"
},
{
"GroupName": "xx",
"GroupId": "xx"
}
],
"ClientToken": "xx",
"SubnetId": "xx",
"InstanceType": "xx",
"NetworkInterfaces": [
{
"Status": "xx",
"MacAddress": "xx",
"SourceDestCheck": xx,
"VpcId": "xx",
"Description": "xx",
"NetworkInterfaceId": "xx",
"PrivateIpAddresses": [
{
"PrivateDnsName": "xx",
"Primary": xx,
"PrivateIpAddress": "xx"
}
],
"PrivateDnsName": "xx",
"Attachment": {
"Status": "xx",
"DeviceIndex": xx,
"DeleteOnTermination": xx,
"AttachmentId": "xx",
"AttachTime": "xx"
},
"Groups": [
{
"GroupName": "xx",
"GroupId": "xx"
},
{
"GroupName": "xx",
"GroupId": "xx"
}
],
"SubnetId": "xx",
"OwnerId": "xx",
"PrivateIpAddress": "xx"
}
],
"SourceDestCheck": xx,
"Placement": {
"Tenancy": "xx",
"GroupName": "xx",
"AvailabilityZone": "xx"
},
"Hypervisor": "xx",
"BlockDeviceMappings": [
{
"DeviceName": "/dev/sda1",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-2222222a",
"AttachTime": "xx"
}
},
{
"DeviceName": "/dev/sdb",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-2222222b",
"AttachTime": "xx"
}
},
{
"DeviceName": "/dev/sdc",
"Ebs": {
"Status": "attached",
"DeleteOnTermination": xx,
"VolumeId": "vol-2222222c",
"AttachTime": "xx"
}
}
],
"Architecture": "xx",
"RootDeviceType": "xx",
"RootDeviceName": "xx",
"VirtualizationType": "hvm",
"Tags": [
{
"Value": "TAG1",
"Key": "VALUE1"
},
{
"Value": "TAG2",
"Key": "VALUE2"
},
{
"Value": "TAG3",
"Key": "VALUE3"
},
{
"Value": "TAG4",
"Key": "VALUE4"
},
{
"Value": "TAG5",
"Key": "VALUE5"
},
{
"Value": "TAG6",
"Key": "Value6"
}
],
"AmiLaunchIndex": xx
}
]
}
]
编辑：我尝试过的一个例子（这个不是为了简单起见而试图获取标签：
jq -r '.Reservations.Instances | map(({ InstanceId } + (.BlockDeviceMappings | add) + (.BlockDeviceMappings.Ebs | Add))| { InstanceId, DeviceName, VolumeId })' <(echo "$json_array_windows")
jq: error: Add/0 is not defined at <top-level>, line 1:
.Reservations.Instances | map(({ InstanceId } + (.BlockDeviceMappings | add) + (.BlockDeviceMappings.Ebs | Add))| { InstanceId, DeviceName, VolumeId })
jq: 1 compile error
【问题讨论】：