安装istio v1.0 详细过程和步骤

创建 istio 目录

[root@centos-110 ~]# mkdir istio

[root@centos-110 ~]# cd istio

方案一：

# 去下面的地址下载压缩包

# https://github.com/istio/istio/releases

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

$ tar -zvxf istio-1.0.0-linux.tar.gz

方案二：

# 使用官方的安装脚本安装

运行如下命令，自动下载并解压最新的发布包

$ curl -L https://git.io/getLatestIstio | sh -

[root@centos-110 istio]# curl -L https://git.io/getLatestIstio | sh -

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:--:-- 0:00:09 --:--:-- 0

100 1456 100 1456 0 0 73 0 0:00:19 0:00:19 --:--:-- 388

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

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

100 614 0 614 0 0 60 0 --:--:-- 0:00:10 --:--:-- 133

100 14.1M 100 14.1M 0 0 270k 0 0:00:53 0:00:53 --:--:-- 464k

Downloaded into istio-1.0.0:

bin install istio.VERSION LICENSE README.md samples tools

Add /root/istio/istio-1.0.0/bin to your path; e.g copy paste in your shell and/or ~/.profile:

export PATH="$PATH:/root/istio/istio-1.0.0/bin"

[root@centos-110 istio]#

安装目录包含如下内容：

在 install/ 目录中包含了 Kubernetes 安装所需的 .yaml 文件
samples/ 目录中是示例应用
istioctl 客户端文件保存在 bin/ 目录之中。istioctl 的功能是手工进行 Envoy Sidecar 的注入，以及对路由规则、策略的管理
istio.VERSION 配置文件

# 安装配置环境变量

编辑/etc/profile，添加istioctl 到PATH

[root@centos-110 istio-1.0.0]# vim /etc/profile

在profile文件底部，增加如下一行：

export PATH=$PATH:/root/istio/istio-1.0.0/bin

执行source命令，使修改马上生效

[root@centos-110 istio-1.0.0]# source /etc/profile

[root@centos-110 istio-1.0.0]# echo $PATH

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/root/istio/istio-1.0.0/bin

验证istioctl 安装成功

[root@centos-110 bin]# istioctl version

Version: 1.0.0

GitRevision: 3a136c90ec5e308f236e0d7ebb5c4c5e405217f4

User: root@71a9470ea93c

Hub: gcr.io/istio-release

GolangVersion: go1.10.1

BuildStatus: Clean

# 安装Istio的CRD（Custom Resource Definitions）

kubectl apply -f install/kubernetes/helm/istio/templates/crds.yaml

# 安装Istio - Sidecars之间不启用TLS认证

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

需要拉取镜像：

示例：拉取 gcr.io/istio-release/citadel:1.0.0 镜像

[root@centos-110 ~]# docker pull registry.cn-hangzhou.aliyuncs.com/istio-release/citadel:1.0.0

1.0.0: Pulling from istio-release/citadel

887bbdf2518e: Pull complete

549fcf855a71: Pull complete

1c1bf79cad30: Pull complete

Digest: sha256:01d182138511deba644e039ecccf87b048c3a88f12e8f0085c873ef7d1734dbf

Status: Downloaded newer image for registry.cn-hangzhou.aliyuncs.com/istio-release/citadel:1.0.0

[root@centos-110 ~]# docker tag registry.cn-hangzhou.aliyuncs.com/istio-release/citadel:1.0.0 gcr.io/istio-release/citadel:1.0.0

[root@centos-110 ~]# docker rmi registry.cn-hangzhou.aliyuncs.com/istio-release/citadel:1.0.0

Untagged: registry.cn-hangzhou.aliyuncs.com/istio-release/citadel:1.0.0

Untagged: registry.cn-hangzhou.aliyuncs.com/istio-release/citadel@sha256:01d182138511deba644e039ecccf87b048c3a88f12e8f0085c873ef7d1734dbf

示例：拉取 gcr.io/istio-release/galley:1.0.0 镜像

[root@centos-110 ~]# docker pull registry.cn-hangzhou.aliyuncs.com/istio-release/galley:1.0.0

[root@centos-110 ~]# docker tag registry.cn-hangzhou.aliyuncs.com/istio-release/galley:1.0.0 gcr.io/istio-release/galley:1.0.0

[root@centos-110 ~]# docker rmi registry.cn-hangzhou.aliyuncs.com/istio-release/galley:1.0.0

示例：拉取 gcr.io/istio-release/pilot:1.0.0 镜像

docker pull registry.cn-hangzhou.aliyuncs.com/istio-release/pilot:1.0.0

docker tag registry.cn-hangzhou.aliyuncs.com/istio-release/pilot:1.0.0 gcr.io/istio-release/pilot:1.0.0

docker rmi registry.cn-hangzhou.aliyuncs.com/istio-release/pilot:1.0.0

示例：拉取 gcr.io/istio-release/sidecar_injector:1.0.0 镜像

docker pull registry.cn-hangzhou.aliyuncs.com/istio-release/sidecar_injector:1.0.0

docker tag registry.cn-hangzhou.aliyuncs.com/istio-release/sidecar_injector:1.0.0 gcr.io/istio-release/sidecar_injector:1.0.0

docker rmi registry.cn-hangzhou.aliyuncs.com/istio-release/sidecar_injector:1.0.0

拉取其他镜像的类似，只需要简单替换一下 image name 即可。

参考上面的docker 命令，获取如下所有镜像：

gcr.io/istio-release/citadel:1.0.0

gcr.io/istio-release/galley:1.0.0

gcr.io/istio-release/proxyv2:1.0.0

gcr.io/istio-release/grafana:1.0.0

gcr.io/istio-release/mixer:1.0.0

gcr.io/istio-release/servicegraph:1.0.0

gcr.io/istio-release/pilot:1.0.0

gcr.io/istio-release/sidecar_injector:1.0.0

下面这个镜像是sidecar 自动注入是需要使用的镜像：

gcr.io/istio-release/proxy_init:1.0.0

docker pull registry.cn-hangzhou.aliyuncs.com/istio-release/proxy_init:1.0.0

docker tag registry.cn-hangzhou.aliyuncs.com/istio-release/proxy_init:1.0.0 gcr.io/istio-release/proxy_init:1.0.0

docker rmi registry.cn-hangzhou.aliyuncs.com/istio-release/proxy_init:1.0.0

验证安装结果

确认下列 Kubernetes 服务已经部署：istio-pilot、 istio-ingressgateway、istio-policy、istio-telemetry、prometheus 、istio-sidecar-injector（可选）。

kubectl get svc -n istio-system

确保所有相应的Kubernetes pod都已被部署且所有的容器都已启动并正在运行：istio-pilot-*、istio-ingressgateway-*、istio-egressgateway-*、istio-policy-*、istio-telemetry-*、istio-citadel-*、prometheus-*、istio-sidecar-injector-*（可选）。

kubectl get pods -o wide -n istio-system

从上面的输出可以看到，这里部署的主要是Istio控制面的服务，而数据面的网络代理要如何部署呢？

根据服务网格（Service Mesh）的架构可以得知，网络代理是随着应用程序以sidecar的方式部署的，在下面部署Bookinfo示例程序时会演示如何部署网络代理。

至此，Istio 已经安装完成了。:)

参考链接：

注入 Istio sidecar

https://preliminary.istio.io/zh/docs/setup/kubernetes/sidecar-injection/#sidecar-%E7%9A%84%E8%87%AA%E5%8A%A8%E6%B3%A8%E5%85%A5

Install with helm

https://istio.io/docs/setup/kubernetes/helm-install/#option-2-install-with-helm-and-tiller-via-helm-install

控制 Ingress 流量

https://preliminary.istio.io/zh/docs/tasks/traffic-management/ingress/

Bookinfo 应用