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Add a example for union operator in the shell env (#16282) 

In the current example, single quotes are used, but the union operator can  be confusing.
Incorrect：
`kubectl get pod -o=jsonpath='{.items[*]['metadata.name','spec.nodeName']}'`  
Correct:
`kubectl get pods -o=jsonpath="{.items[*]['metadata.name', 'status.capacity']}"`
This commit is contained in:
Hardy 2019-10-09 06:55:51 +08:00 committed by Kubernetes Prow Robot
parent 849dc428db
commit e5863effe6
1 changed files with 2 additions and 1 deletions
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3
content/en/docs/reference/kubectl/jsonpath.md
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@ -72,7 +72,7 @@ Function | Description | Example
`.` or `[]` | child operator | `{.kind}` or `{['kind']}` | `List`
`..` | recursive descent | `{..name}` | `127.0.0.1 127.0.0.2 myself e2e`
`*` | wildcard. Get all objects | `{.items[*].metadata.name}` | `[127.0.0.1 127.0.0.2]`
`[start:end :step]` | subscript operator | `{.users[0].name}` | `myself`
`[start:end:step]` | subscript operator | `{.users[0].name}` | `myself`
`[,]` | union operator | `{.items[*]['metadata.name', 'status.capacity']}` | `127.0.0.1 127.0.0.2 map[cpu:4] map[cpu:8]`
`?()` | filter | `{.users[?(@.name=="e2e")].user.password}` | `secret`
`range`, `end` | iterate list | `{range .items[*]}[{.metadata.name}, {.status.capacity}] {end}` | `[127.0.0.1, map[cpu:4]] [127.0.0.2, map[cpu:8]]`
@ -85,6 +85,7 @@ kubectl get pods -o json
kubectl get pods -o=jsonpath='{@}'
kubectl get pods -o=jsonpath='{.items[0]}'
kubectl get pods -o=jsonpath='{.items[0].metadata.name}'
kubectl get pods -o=jsonpath="{.items[*]['metadata.name', 'status.capacity']}"
kubectl get pods -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.startTime}{"\n"}{end}'
```