Istio 1.1部署实践

前提条件

• 正确安装配置Kubernetes集群
• CentOS Linux release 7.5.1804

安装

下载istio 1.1版本

[root@vm157 ~]# wget https://github.com/istio/istio/releases/download/1.1.1/istio-1.1.1-linux.tar.gz

……

2019-03-26 09:39:06 (483 KB/s) - ‘istio-1.1.1-linux.tar.gz’ saved [15736205/15736205]

Istio安装有多种方式，本文根据helm template生成istio部署的配置文件，其他部署方式请参考官方文档。

[root@vm157 ~]# cd istio-1.1.1/
[root@ruffy istio-1.1.1]# helm template ../install/kubernetes/helm/istio-init --name istio-init --namespace istio-system > istio-init.yaml
[root@ruffy istio-1.1.1]# kubectl get crds | grep 'istio.io\|certmanager.k8s.io' | wc -l
[root@ruffy istio-1.1.1]# InternalIp=10.20.1.175
[root@ruffy istio-1.1.1]# helm template install/kubernetes/helm/istio --namespace istio-system \
>   --set global.mtls.enabled=true \
>   --set global.controlPlaneSecurityEnabled=true \
>   --set gateways.istio-ingressgateway.type=NodePort \
>   --set grafana.enabled=true \
>   --set servicegraph.enabled=true \
>   --set servicegraph.ingress.enabled=true \
>   --set servicegraph.ingress.hosts={servicegraph-istio-system.${InternalIp}.nip.io} \
>   --set tracing.enabled=true \
>   --set tracing.jaeger.ingress.enabled=true \
>   --set tracing.jaeger.ingress.hosts={jaeger-query-istio-system.${InternalIp}.nip.io} \
>   --set tracing.ingress.enabled=true \
>   --set tracing.ingress.hosts={tracing-istio-system.${InternalIp}.nip.io} \
>   --set kiali.enabled=true \
>   --set kiali.ingress.enabled=true \
>   --set kiali.ingress.hosts={kiali-istio-system.${InternalIp}.nip.io} \
>   --set kiali.dashboard.grafanaURL=http://grafana-istio-system.${InternalIp}.nip.io \
>   --set kiali.dashboard.jaegerURL=http://jaeger-query-istio-system.${InternalIp}.nip.io \
>   --name istio > ruffy/istio-${InternalIp}.yaml

[root@vm175 istio-1.1.1]# cd ruffy
[root@vm175 ruffy]# ls
istio-10.20.1.175.yaml  istio-init.yaml         namespace.yaml

根据配置模板部署Isito组件

[root@vm175 istio-1.1.1]# kubectl apply -f ruffy/namespace.yaml
namespace/istio-system created         
[root@vm175 istio-1.1.1]# kubectl apply -f ruffy/istio-init.yaml
configmap/istio-crd-10 created
configmap/istio-crd-11 created
serviceaccount/istio-init-service-account created
clusterrole.rbac.authorization.k8s.io/istio-init-istio-system configured
clusterrolebinding.rbac.authorization.k8s.io/istio-init-admin-role-binding-istio-system configured
job.batch/istio-init-crd-10 created
job.batch/istio-init-crd-11 created
[root@vm175 istio-1.1.1]# kubectl apply -f ruffy/istio-10.20.1.175.yaml
poddisruptionbudget.policy/istio-galley created
poddisruptionbudget.policy/istio-ingressgateway created
poddisruptionbudget.policy/istio-policy created
poddisruptionbudget.policy/istio-telemetry created
poddisruptionbudget.policy/istio-pilot created
……
rule.config.istio.io/promhttp created
rule.config.istio.io/promtcp created
rule.config.istio.io/promtcpconnectionopen created
rule.config.istio.io/promtcpconnectionclosed created
handler.config.istio.io/kubernetesenv created
rule.config.istio.io/kubeattrgenrulerule created
rule.config.istio.io/tcpkubeattrgenrulerule created
kubernetes.config.istio.io/attributes created
destinationrule.networking.istio.io/istio-policy created
destinationrule.networking.istio.io/istio-telemetry created

查看Isito部署状态

[root@vm175 istio-1.1.1]# kubectl -n istio-system get all

NAME                                          READY     STATUS              RESTARTS   AGE

pod/grafana-7b46bf6b7c-xr2lw                  1/1       Running             0          2m
pod/istio-citadel-5878d994cc-kfm7p            1/1       Running             0          2m
pod/istio-cleanup-secrets-1.1.1-wlk7p         0/1       Completed           0          2m
pod/istio-galley-6db4964df6-9lpsl             1/1       Running             0          2m
pod/istio-grafana-post-install-1.1.1-44lv7    0/1       Completed           0          2m
pod/istio-ingressgateway-cd5df7bc6-sgh5m      0/1       Running             0          2m
pod/istio-init-crd-10-q5kvp                   0/1       Completed           0          3m
pod/istio-init-crd-11-kdd25                   0/1       Completed           0          3m
pod/istio-pilot-597dd58685-hsp72              1/2       Running             0          2m
pod/istio-policy-67f66c8b5c-8kqwm             2/2       Running             5          2m
pod/istio-security-post-install-1.1.1-gcjrm   0/1       Completed           0          2m
pod/istio-sidecar-injector-59fc9d6f7d-j9prx   0/1       ContainerCreating   0          2m
pod/istio-telemetry-c5bfc457f-qqzb5           2/2       Running             4          2m
pod/istio-tracing-75dd89b8b4-2t2hl            0/1       ContainerCreating   0          2m
pod/kiali-5d68f4c676-bdltq                    1/1       Running             0          2m
pod/prometheus-89bc5668c-7kp8b                0/1       Init:Error          1          2m
pod/servicegraph-57bfbbd697-6tldj             0/1       Running             0          2m

……

NAME                                          DESIRED   SUCCESSFUL   AGE

job.batch/istio-cleanup-secrets-1.1.1         1         1            2m

job.batch/istio-grafana-post-install-1.1.1    1         1            2m

job.batch/istio-init-crd-10                   1         1            3m

job.batch/istio-init-crd-11                   1         1            3m

job.batch/istio-security-post-install-1.1.1   1         1            2m

增加grafana和prometheus的ingress文件

Istio-grafana.yaml

[root@vm175 ruffy]# cat istio-grafana-ingress.yaml

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

name: grafana

namespace: istio-system

labels:

app: grafana

annotations:

spec:

rules:

• host: granafa-istio.10.20.1.175.xip.io http: paths:
  • path: / backend: serviceName: grafana servicePort: 3000

Isito-prometheus-ingress.yaml

[root@vm175 ruffy]# cat istio-prometheus-ingress.yaml

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

name: istio-prometheus

namespace: istio-system

spec:

rules:

• host: prometheus-istio.10.20.1.175.xip.io http: paths:
  • path: /prometheus backend: serviceName: prometheus servicePort: 9090}}}

查看部署的组件访问路径

{{{[root@vm175 ruffy]# kubectl -n istio-system get ing

NAME                 HOSTS                                          ADDRESS   PORTS     AGE

grafana              granafa-istio.10.20.1.175.xip.io                         80        5m

istio-prometheus     prometheus-istio.10.20.1.175.xip.io                      80        5m

istio-servicegraph   servicegraph-istio-system.10.20.1.175.nip.io             80        56m

istio-tracing        tracing-istio-system.10.20.1.175.nip.io                  80        56m

kiali                kiali-istio-system.10.20.1.175.nip.io                    80        56m

访问kiali时，出现secret不存在的情况，需要通过kiali-secret.yaml文件创建secret，并且重启kiali服务。

Kiali-secret.yaml文件

[root@vm175 ruffy]# cat kiali-secret.yaml

apiVersion: v1

kind: Secret

metadata:

name: kiali

namespace: istio-system

labels:

app: kiali

type: Opaque

data:

username: "YWRtaW4="

passphrase: "YWRtaW4="

访问Kiali

浏览器输入地址：http://kiali-istio-system.10.2 ... iali/
用户名/密码：admin/admin

访问servicegraph

浏览器输入地址：http://servicegraph-istio-syst ... .html

访问tracing

浏览器输入地址：http://servicegraph-istio-syst ... .html

访问granafa

浏览器输入地址：http://granafa-istio.10.20.1.1 ... d%3D1

至此 Istio1.1及其依赖组件搭建完毕。