TL;博士
我正在尝试获取juju status输出的JSON表示，它将机器，实例ID和单元客观化，使得JSON看起来类似于：
{
"0": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "easyrsa/0"
},
"1": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "etcd/0"
},
"2": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "kubeapi-load-balancer/0"
},
"10": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "kubernetes-worker/4"
},
"11": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "kubernetes-worker/5"
},
"12": {
"instance-id": "i-xxxxxxxxxxxxxx",
"unit-name": "kubernetes-master/3"
}
}
很长一段时间：
Munging juju status --format json对我来说很复杂，因为要传播的数据在JSON中的两个不同的主要对象之间分配。由于机器的键不可迭代，但是我以后不能像我可以使用数组那样引用它们 - 或者至少我觉得我搞砸了。
我尝试过但失败的一些事情（主要是因为我很难解决如何存储.machines密钥以供日后使用）...
juju status --format json | jq -r '.machines as $m | .machines | [foreach keys[] as $item ({m: $item, id: $m[$item]."instance-id"})]'
... | juju status --format json | jq -r '.machines | keys[] as $k...
... | juju status --format json | jq -r '.machines | keys[] as $k |...
要么我没有得到我需要的结果，要么我得到语法错误。我从来没有必要在jq上下文中使用foreach。事实上，这是我用jq试图完成的最复杂的事情，所以我在这里超出了我的舒适区。非常感谢任何帮助。
这是一个示例juju status JSON对象：
{
"model": {
"name": "xxxxxxxxxx",
"controller": "xxxxxxxxxx",
"cloud": "xxxxxxxxxx",
"region": "xxxxxxxxxx",
"version": "xxxxxxxxxx",
"model-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"sla": "xxxxxxxxxx"
},
"machines": {
"0": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.229",
"252.0.229.1"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"eth0": {
"ip-addresses": [
"10.0.0.229"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
},
"fan-252": {
"ip-addresses": [
"252.0.229.1"
],
"mac-address": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
},
"1": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.61",
"252.0.61.1"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"eth0": {
"ip-addresses": [
"10.0.0.61"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
},
"fan-252": {
"ip-addresses": [
"252.0.61.1"
],
"mac-address": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
},
"10": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.37",
"252.0.37.1"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"ens5": {
"ip-addresses": [
"10.0.0.37"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
},
"fan-252": {
"ip-addresses": [
"252.0.37.1"
],
"mac-address": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
},
"11": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.54"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"ens5": {
"ip-addresses": [
"10.0.0.54"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
},
"12": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.101"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"ens5": {
"ip-addresses": [
"10.0.0.101"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
},
"2": {
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"dns-name": "xxxxxxxxxx",
"ip-addresses": [
"10.0.0.184",
"252.0.184.1"
],
"instance-id": "i-xxxxxxxxxxxxxx",
"machine-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"series": "xxxxxxxxxx",
"network-interfaces": {
"eth0": {
"ip-addresses": [
"10.0.0.184"
],
"mac-address": "xxxxxxxxxx",
"gateway": "xxxxxxxxxx",
"is-up": true
},
"fan-252": {
"ip-addresses": [
"252.0.184.1"
],
"mac-address": "xxxxxxxxxx",
"is-up": true
}
},
"constraints": "xxxxxxxxxx",
"hardware": "xxxxxxxxxx"
}
},
"applications": {
"easyrsa": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 39,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": false,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"client": [
"etcd",
"kubeapi-load-balancer",
"kubernetes-master",
"kubernetes-worker"
]
},
"units": {
"easyrsa/0": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"machine": "0",
"public-address": "xxxxxxxxxx"
}
},
"version": "xxxxxxxxxx"
},
"etcd": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 77,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": false,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"certificates": [
"easyrsa"
],
"cluster": [
"etcd"
],
"db": [
"flannel",
"kubernetes-master"
]
},
"units": {
"etcd/0": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"machine": "1",
"open-ports": [
"2379/tcp"
],
"public-address": "xxxxxxxxxx"
}
},
"version": "xxxxxxxxxx"
},
"flannel": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 52,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": false,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"cni": [
"kubernetes-master",
"kubernetes-worker"
],
"etcd": [
"etcd"
]
},
"subordinate-to": [
"kubernetes-master",
"kubernetes-worker"
],
"version": "xxxxxxxxxx"
},
"kubeapi-load-balancer": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 57,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": true,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"apiserver": [
"kubernetes-master"
],
"certificates": [
"easyrsa"
],
"loadbalancer": [
"kubernetes-master"
],
"website": [
"kubernetes-worker"
]
},
"units": {
"kubeapi-load-balancer/0": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"machine": "2",
"open-ports": [
"443/tcp"
],
"public-address": "xxxxxxxxxx"
}
},
"version": "xxxxxxxxxx"
},
"kubernetes-master": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 102,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": false,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"certificates": [
"easyrsa"
],
"cni": [
"flannel"
],
"etcd": [
"etcd"
],
"kube-api-endpoint": [
"kubeapi-load-balancer"
],
"kube-control": [
"kubernetes-worker"
],
"loadbalancer": [
"kubeapi-load-balancer"
]
},
"units": {
"kubernetes-master/3": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"machine": "12",
"open-ports": [
"6443/tcp"
],
"public-address": "xxxxxxxxxx",
"subordinates": {
"flannel/9": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"upgrading-from": "xxxxxxxxxx",
"public-address": "xxxxxxxxxx"
}
}
}
},
"version": "xxxxxxxxxx"
},
"kubernetes-worker": {
"charm": "xxxxxxxxxx",
"series": "xxxxxxxxxx",
"os": "xxxxxxxxxx",
"charm-origin": "xxxxxxxxxx",
"charm-name": "xxxxxxxxxx",
"charm-rev": 114,
"can-upgrade-to": "xxxxxxxxxx",
"exposed": false,
"application-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"relations": {
"certificates": [
"easyrsa"
],
"cni": [
"flannel"
],
"kube-api-endpoint": [
"kubeapi-load-balancer"
],
"kube-control": [
"kubernetes-master"
]
},
"units": {
"kubernetes-worker/4": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"machine": "10",
"open-ports": [
"80/tcp",
"443/tcp"
],
"public-address": "xxxxxxxxxx",
"subordinates": {
"flannel/7": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"upgrading-from": "xxxxxxxxxx",
"public-address": "xxxxxxxxxx"
}
}
},
"kubernetes-worker/5": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"machine": "11",
"open-ports": [
"80/tcp",
"443/tcp"
],
"public-address": "xxxxxxxxxx",
"subordinates": {
"flannel/8": {
"workload-status": {
"current": "xxxxxxxxxx",
"message": "xxxxxxxxxx",
"since": "xxxxxxxxxx"
},
"juju-status": {
"current": "xxxxxxxxxx",
"since": "xxxxxxxxxx",
"version": "xxxxxxxxxx"
},
"leader": true,
"upgrading-from": "xxxxxxxxxx",
"public-address": "xxxxxxxxxx"
}
}
}
},
"version": "xxxxxxxxxx"
}
}
}
答案 0 :(得分：1)
我不清楚“单位名称”的价值究竟是如何得出的，但以下内容可以帮助您：
def machine($id):
first(.applications[]
| (.units? // empty)
| to_entries[]
| select(.value.machine == $id)
| .key ) ;
. as $in
| .machines
| to_entries[]
| .key as $key
| {($key): {
"unit-name": (.value |.["instance-id"]),
"machine": ($in|machine($key))
} }
根据您的输入，这会产生一个开始的对象流：
{
"0": {
"unit-name": "xxxxxxxxxx",
"machine": "easyrsa/0"
}
}
{
"1": {
"unit-name": "xxxxxxxxxx",
"machine": "etcd/0"
}
}
解决方案说明了三个值得注意的要点：
to_entries在预先知道（或未知）感兴趣的特定密钥（或多个密钥）时必须使用密钥/值组合时非常有用;另一种方法是使用keys_unsorted;
将不同来源的信息汇总起来时，美元变量非常方便;
jq对函数定义的支持使得编写比其他方式更易读和可维护的程序成为可能。