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  • 安装kubectl ingress-nginx

    参考官网:https://kubernetes.github.io/ingress-nginx/kubectl-plugin/

    前提

    软件 版本
    k8s 不挑
    ingress-nginx 不挑

    安装

    1、安装krew

    ingress-nginx插件需要通过krew安装,首先需要安装krew工具

    执行以下脚本安装krew

    (
      set -x; cd "$(mktemp -d)" &&
      curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/krew.tar.gz" &&
      tar zxvf krew.tar.gz &&
      KREW=./krew-"$(uname | tr '[:upper:]' '[:lower:]')_$(uname -m | sed -e 's/x86_64/amd64/' -e 's/arm.*$/arm/')" &&
      "$KREW" install krew
    )
    

    /etc/profile 设置PATH

    export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"
    

    参考:https://krew.sigs.k8s.io/docs/user-guide/setup/install/

    2、krew安装ingress-nginx插件

    kubectl krew install ingress-nginx
    

    3、验证

    kubectl ingress-nginx --help
    

    使用

    默认是在default命名空间下查找ingress-nginx-controller deployment,Rancher安装的ingress-nginx是使用daemonset部署的,不知道通过daemonset查找,但是可以通过pod或者标签选择器查找,例如:

    kubectl ingress-nginx backends -n ingress-nginx --pod nginx-ingress-controller-rplw2  --list
    ## 或者
    kubectl ingress-nginx backends -n ingress-nginx -l app=ingress-nginx  --list
    

    backends

    ## 只列出backends
    kubectl ingress-nginx backends -n ingress-nginx -l app=ingress-nginx  --list
    
    ## 查看某个backend的详细信息
    kubectl ingress-nginx backends -n ingress-nginx -l app=ingress-nginx  --backend default-nginx-test-http-nginx-test
    
    ## 查看所有backends
    kubectl ingress-nginx backends -n ingress-nginx -l app=ingress-nginx
    
    

    cert 查看证书

    如果ingress设置了ssl,可以通过cert命令查看证书,例如:

    kubectl ingress-nginx certs -l app=ingress-nginx  -n ingress-nginx --host test3.zerchin.xyz
    

    这里的--host指定的是域名,不是backend list的名字

    conf 查看配置

    ### 默认不带参数,查看所有配置,等同于进入pod查看/etc/nginx/nginx.conf
    kubectl ingress-nginx conf -l app=ingress-nginx  -n ingress-nginx
    
    ### 查看单个ingress的配置,这里查看的是server下的配置
    kubectl ingress-nginx conf -l app=ingress-nginx  -n ingress-nginx --host nginx.zerchin.xyz
    
    

    exec 执行命令

    默认带有一个exec参数,可以执行相关命令,但是这个感觉没有自带的kubectl exec 好用

    kubectl ingress-nginx exec -l app=ingress-nginx  -n ingress-nginx  pwd
    /etc/nginx
    

    service

    由于Rancher部署的ingress-nginx没有对应service,暂时看不到

    ingresses

    提供所有入口定义的简短摘要,类似kubectl get ingress

    kubectl ingress-nginx ingresses --all-namespaces --host nginx.zerchin.xyz
    NAMESPACE   INGRESS NAME   HOST+PATH            ADDRESSES      TLS   SERVICE      SERVICE PORT      ENDPOINTS
    default     nginx          nginx.zerchin.xyz/   47.242.45.56   NO    nginx-test   http-nginx-test   4
    

    lint

    检查kubernetes资源中可能存在的问题

    kubectl ingress-nginx lint --all-namespaces --show-all -v
    Checking ingresses...
    ✓ default/nginx
    ✓ default/test
    ✓ default/test3-ssl
    Checking deployments...
    ✓ cattle-prometheus/exporter-kube-state-cluster-monitoring
    ✓ cattle-prometheus/grafana-cluster-monitoring
    ✓ cattle-prometheus/prometheus-operator-monitoring-operator
    ✓ cattle-system/cattle-cluster-agent
    ✓ default/busybox
    ✓ default/nginx-test
    ✓ default/proxy-nginx
    ✓ default/test
    ✓ ingress-nginx/default-http-backend
    ✓ kube-system/coredns
    ✓ kube-system/coredns-autoscaler
    ✓ kube-system/metrics-server
    ✓ local-path-storage/local-path-provisioner
    ✓ nfs-client-provisioner/nfs-client-provisioner
    ✓ p-6bwf5-pipeline/docker-registry
    ✓ p-6bwf5-pipeline/example-helloserver
    ✓ p-6bwf5-pipeline/jenkins
    ✓ p-6bwf5-pipeline/minio
    ✓ p-x25kp-pipeline/docker-registry
    ✓ p-x25kp-pipeline/example-nginx
    ✓ p-x25kp-pipeline/jenkins
    ✓ p-x25kp-pipeline/minio
    

    logs

    查看日志,等同于kubectl logs命令

    ## 常用这个
    kubectl ingress-nginx  logs -n ingress-nginx -l app=ingress-nginx --tail 100 -f
    
    ## 其他参数
    ## 返回特定时间
    --since
    --since-time
    

    ssh

    等同于kubectl exec -it xxx -- bash

    kubectl ingress-nginx  ssh -n ingress-nginx -l app=ingress-nginx
    bash-5.0$ 
    
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  • 原文地址:https://www.cnblogs.com/zerchin/p/14252070.html
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