我有以下 yaml 文件。
resources:
- apiVersion: v1
kind: Deployment
metadata:
labels:
app: test
name: test-cluster-operator
namespace: destiny001
spec:
selector:
matchLabels:
name: test-cluster-operator
test.io/kind: cluster-operator
strategy:
type: Recreate
template:
metadata:
labels:
name: test-cluster-operator
test.io/kind: cluster-operator
spec:
containers:
- args:
- /path/test/bin/cluster_operator_run.sh
env:
- name: MY_NAMESPACE
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /healthy
port: 8080
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 30
successThreshold: 1
timeoutSeconds: 1
name: test-cluster-operator
readinessProbe:
failureThreshold: 3
httpGet:
path: /ready
port: 8080
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 30
successThreshold: 1
timeoutSeconds: 1
resources:
limits:
cpu: '1'
memory: 256Mi
requests:
cpu: 200m
memory: 256Mi
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/data
name: data-cluster-operator
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: test-cluster-operator
serviceAccountName: test-cluster-operator
terminationGracePeriodSeconds: 30
volumes:
- name: data-cluster-operator
persistentVolumeClaim:
claimName: data-cluster-operator
我正在尝试获取名为 MY_NAMESPACE 的环境变量的值。这就是我在 Ansible 中尝试获取 env 树路径的方法。
- name: "set test fact"
set_fact:
myresult: "{{ yaml_file_variable | json_query(\"resources[?metadata.name=='test-cluster-operator'].spec.template.spec\") | json_query(\"containers[?name=='test-cluster-operator'].env\") }}"
- name: "debug"
debug:
msg: "{{ myresult }}"
这会产生一个空列表,但是第一个 json_query 效果很好。
在这种情况下如何正确使用 json_query?我可以只用一个 json_query 来实现吗?
编辑: 我似乎更接近解决方案,但结果是一个列表而不是字符串,我觉得这很烦人。
- name: "set test fact"
set_fact:
myresult: "{{ yaml_file_variable | json_query(\"resources[?metadata.name=='test-cluster-operator'].spec.template.spec\") | json_query(\"[].containers[?name=='test-cluster-operator']\") | json_query(\"[].env[?name=='MY_NAMESPACE'].name\") }}"
这将打印- - MY_NAMESPACE
而不是仅打印MY_NAMESPACE
.
first
每次 json_query 之后我都必须使用过滤器吗?我确信只有一个containers
元素。我不明白为什么 json_query 返回一个列表。
这终于奏效了,但不知道这是否是正确的方法。
- name: "set test fact"
set_fact:
myresult: "{{ yaml_file_variable | json_query(\"resources[?metadata.name=='test-cluster-operator'].spec.template.spec\") | first | json_query(\"containers[?name=='test-cluster-operator']\") | first | json_query(\"env[?name=='MY_NAMESPACE'].valueFrom \") | first }}"