kubernetes port-forward _Kubernetes

宝剑锋从磨砺出，梅花香自苦寒来。这篇文章主要讲述kubernetes port-forward相关的知识，希望能为你提供帮助。
在上一篇文章中(??https://blog.51cto.com/luosea/4769771??)我们配置了本地kubectl config, 现在我们来配置port-forward.
tips:
当我们使用helm upgrade 更新后,最后会有句类似下面的提示:

helm upgrade prometheus /opt/prometheus-monitoring-qa/prometheus --namespace monitoring

NOTES:
The Prometheus server can be accessed via port 80 on the following DNS name from within your cluster:
prometheus-server.monitoring.svc.cluster.local

Get the Prometheus server URL by running these commands in the same shell:
export POD_NAME=$(kubectl get pods --namespace monitoring -l "app=prometheus,component=server" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace monitoring port-forward $POD_NAME 9090

现在我们来设置端口转发:
直接将这两行命令在本地执行

export POD_NAME=$(kubectl get pods --namespace monitoring -l "app=prometheus,component=server" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace monitoring port-forward $POD_NAME 9090

然后在浏览器上打开 ??http://localhost:9090/?? 应该就可以看到对应的内容了
【kubernetes port-forward】

如果我们得到的提示如下:

?~kubectl --namespace monitoring port-forward $POD_NAME 9090

error: error upgrading connection:

那就估计是pod name的问题
使用kubectl get pods -n monitoring 查看对应的pods名字

?~ kubectl get pods -n monitoring
NAMEREADYSTATUSRESTARTSAGE
alertmanager-kube-prometheus-stack-alertmanager-02/2Running0177d
kube-prometheus-stack-grafana-dfb76888d-mrlhg2/2Running053d
kube-prometheus-stack-kube-state-metrics-66789f8885-5c5jt1/1Running653d
kube-prometheus-stack-operator-866999d799-5658g1/1Running0177d
kube-prometheus-stack-prometheus-node-exporter-4qnm71/1Running3180d
kube-prometheus-stack-prometheus-node-exporter-99zvf1/1Running7180d
kube-prometheus-stack-prometheus-node-exporter-c8xg21/1Running3180d
kube-prometheus-stack-prometheus-node-exporter-v9f9f1/1Running4180d
kube-prometheus-stack-prometheus-node-exporter-zgq8t1/1Running0180d
prometheus-blackbox-exporter-9fd56958c-xqlkw1/1Running56418d
prometheus-kube-prometheus-stack-prometheus-02/2Running139h
prometheus-kube-state-metrics-c65b87574-fgq751/1Running1177d
prometheus-mysql-exporter-msqa-666c944bbc-zlmjb1/1Running053d
prometheus-mysql-exporter-qa-664d8d7fb6-22rpt1/1Running0356d
prometheus-server-786497558b-lg49q0/2Terminating053d
prometheus-server-786497558b-wpzfd2/2Running024h
victoria-metrics-single-server-01/1Running039h
?~