小編給大家分享一下kubernetes中istio-1.0.0如何部署和試用，希望大家閱讀完這篇文章之后都有所收獲，下面讓我們一起去探討吧！

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一：簡(jiǎn)介

本文介紹如何在kubernetes1.10.4集群中部署istio-1.0.0 并試用istio自帶的bookinfo實(shí)例應(yīng)用。

二：安裝

1.獲取安裝包

wget https://github.com/istio/istio/releases/download/1.0.0/istio-1.0.0-linux.tar.gz

tar -zxvf istio-1.0.0-linux.tar.gz

2.安裝istioctl

如果手動(dòng)注入sidecar的話需要使用這個(gè)命令:

cp istio-1.0./bin/istioctl /usr/local/bin/

設(shè)置環(huán)境變量：

ISTIO_HOME=/root/istio-1.0

PATH=$ISTIO_HOME/bin:$PATH

export  ISTIO_HOME  PATH 

3.安裝istio核心組件

kubectl apply -f istio-1.0.0/install/kubernetes/istio-demo.yaml

gcr.io和quay.io相關(guān)的鏡像下載不了的話可以替換為自己的鏡像：

daocloud.io/liukuan73/proxy_init:1.0.0

daocloud.io/liukuan73/galley:1.0.0

daocloud.io/liukuan73/mixer:1.0.0

daocloud.io/liukuan73/proxyv2:1.0.0

daocloud.io/liukuan73/pilot:1.0.0

daocloud.io/liukuan73/citadel:1.0.0

daocloud.io/liukuan73/servicegraph:1.0.0

daocloud.io/liukuan73/sidecar_injector:1.0.0

daocloud.io/liukuan73/istio-grafana:1.0.0

4.安裝結(jié)果驗(yàn)證

三：試用

1.sidecar自動(dòng)注入配置

 Istio裝好后，如果想sidecar在應(yīng)用啟動(dòng)時(shí)自動(dòng)注入到pod中，還需要配置如下4步：

a.安裝istio-sidecar-injector

 安裝了istio-sidecar-injector后，kubectl create起應(yīng)用的時(shí)候sidecar容器會(huì)直接自動(dòng)注入到pod中，而不用手動(dòng)注入。

b.啟用mutating webhook admission controller

在kube-apiserver的啟動(dòng)參數(shù)的admission controller中按正確順序加入如下兩個(gè)controller:MutatingAdmissionWebhook,ValidatingAdmissionWebhook

--admission-control=ServiceAccount,Initializers,NamespaceLifecycle,NamespaceExists,LimitRanger,DefaultStorageClass,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota

c.啟用admissionregistration api

kubectl api-versions | grep admissionregistration

admissionregistration.k8s.io/v1beta1 

d.為需要自動(dòng)注入sidecar的namespace打label

kubectl label namespace istio-test istio-injection=enabled

kubectl get namespace -L istio-injection

2.啟動(dòng)示例應(yīng)用

a.示例結(jié)構(gòu)

b.安裝示例

kubectl apply -n istio-test -f istio-1.0.0/samples/bookinfo/platform/kube/bookinfo.yaml

c. 配置traefik Ingress

為了便于集群外訪問(wèn)驗(yàn)證，配置Ingress代理

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: traefik-ingress
  namespace: kube-system
spec:
  rules:
  - host: elasticsearch.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: elasticsearch-logging
          servicePort: 9200
  - host: kibana.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: kibana-logging
          servicePort: 5601
  - host: locust.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: locust-master
          servicePort: 8089
  - host: dashboard.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: kubernetes-dashboard
          servicePort: 32666
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: istio-ingress
  namespace: istio-system
spec:
  rules:
  - host: grafana.istio.donkey
    http:
      paths:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: traefik-ingress
  namespace: kube-system
spec:
  rules:
  - host: elasticsearch.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: elasticsearch-logging
          servicePort: 9200
  - host: kibana.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: kibana-logging
          servicePort: 5601
  - host: locust.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: locust-master
          servicePort: 8089
  - host: dashboard.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: kubernetes-dashboard
          servicePort: 32666
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: istio-ingress
  namespace: istio-system
spec:
  rules:
  - host: grafana.istio.donkey
    http:
      paths:
      - path: /
        backend:
          serviceName: grafana
          servicePort: 3000
  - host: zipkin.istio.donkey
    http:

3.示例驗(yàn)證

a.bookinfo 示例  http://productpage.donkey/productpage?u=normal

b.監(jiān)控  http://grafana.istio.donkey

c.Prometheus頁(yè)面 http://prometheus.istio.donkey

d.ServiceGraph頁(yè)面

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