Kubernetes 如何在k8s yaml文件中引用标签值
我想引用k8s yaml文件中VirtualService规范部分中的标签值。我使用${metadata.labels[component]}来表示下面的位置。有没有办法实现我的想法Kubernetes 如何在k8s yaml文件中引用标签值,kubernetes,yaml,istio,Kubernetes,Yaml,Istio,我想引用k8s yaml文件中VirtualService规范部分中的标签值。我使用${metadata.labels[component]}来表示下面的位置。有没有办法实现我的想法 apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: istio-ingress-version namespace: netops labels: component: version spe
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: istio-ingress-version
namespace: netops
labels:
component: version
spec:
hosts:
- "service.api.com"
gateways:
- public-inbound-gateway
http:
- match:
- uri:
prefix: /${metadata.labels[component]}/
headers:
referer:
regex: ^https://[^\s/]*a.api.com[^\s]*
rewrite:
uri: "/"
route:
- destination:
host: ${metadata.labels[component]}.3da.svc.cluster.local
- match:
- uri:
prefix: /${metadata.labels[component]}/
headers:
referer:
regex: ^https://[^\s/]*b.api.com[^\s]*
rewrite:
uri: "/"
route:
- destination:
host: ${metadata.labels[component]}.3db.svc.cluster.local
- match:
- uri:
prefix: /${metadata.labels[component]}/
rewrite:
uri: "/"
route:
- destination:
host: ${metadata.labels[component]}.3db.svc.cluster.local
这不是Kubernetes本身的功能,但是还有其他工具可以帮助您解决这个问题 其中最主要的是。它允许您创建可以跨多个不同YAML文件共享的变量,允许您共享值,甚至完全参数化部署。查看downwardAPI,在运行时将pod元数据(如标签和注释)注入pod。
你能举例说明如何在VirtualService规范中使用向下API吗?当资源类型为VirtualService时如何使用它?
apiVersion: v1
kind: Pod
metadata:
name: kubernetes-downwardapi-volume-example
labels:
zone: us-est-coast
cluster: test-cluster1
rack: rack-22
annotations:
build: two
builder: john-doe
spec:
containers:
- name: client-container
image: gcr.io/google_containers/busybox
command: ["sh", "-c", "while true; do if [[ -e /etc/labels ]]; then cat /etc/labels; fi; if [[ -e /etc/annotations ]]; then cat /etc/annotations; fi; sleep 5; done"]
volumeMounts:
- name: podinfo
mountPath: /etc
readOnly: false
volumes:
- name: podinfo
downwardAPI:
items:
- path: "labels"
fieldRef:
fieldPath: metadata.labels
- path: "annotations"
fieldRef:
fieldPath: metadata.annotations