问题描述
我已经使用以下配置来设置Istio
cat << EOF | kubectl apply -f -
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
Metadata:
namespace: istio-system
name: istio-control-plane
spec:
# Use the default profile as the base
# More details at: https://istio.io/docs/setup/additional-setup/config-profiles/
profile: default
# Enable the addons that we will want to use
addonComponents:
grafana:
enabled: true
prometheus:
enabled: true
tracing:
enabled: true
kiali:
enabled: true
values:
global:
# Ensure that the Istio pods are only scheduled to run on Linux nodes
defaultNodeselector:
beta.kubernetes.io/os: linux
kiali:
dashboard:
auth:
strategy: anonymous
components:
egressGateways:
- name: istio-egressgateway
enabled: true
EOF
并公开了如下所述的jaeger-query服务
kubectl expose service jaeger-query --type=LoadBalancer --name=jaeger-query-svc --namespace istio-system
kubectl get svc jaeger-query-svc -n istio-system -o json
export JAEGER_URL=$(kubectl get svc jaeger-query-svc -n istio-system -o jsonpath="{.status.loadBalancer.ingress[0]['hostname','ip']}"):$(kubectl get svc jaeger-query-svc -n istio-system -o 'jsonpath={.spec.ports[0].port}')
echo http://${JAEGER_URL}
curl http://${JAEGER_URL}
我在Jaeger中看不到下面部署的应用程序
并已按如下所述部署了应用程序
cat << EOF | kubectl apply -f -
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
Metadata:
name: Nginx-deployment
namespace: akv2k8s-test
spec:
selector:
matchLabels:
app: Nginx
replicas: 1
template:
Metadata:
labels:
app: Nginx
spec:
containers:
- name: Nginx
image: stenote/Nginx-hostname
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
Metadata:
name: web
namespace: akv2k8s-test
spec:
selector:
app: Nginx
ports:
- protocol: TCP
port: 80
EOF
cat <<EOF | kubectl apply -f -
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
Metadata:
name: public-gateway
namespace: akv2k8s-test
spec:
selector:
istio: ingressgateway # use istio default ingress gateway
servers:
- port:
number: 443
name: https
protocol: HTTPS
tls:
mode: SIMPLE
credentialName: "${KEY_CERT2_NAME}"
hosts:
- web.zaalion.com
EOF
cat <<EOF | kubectl apply -f -
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
Metadata:
name: helloworld
namespace: akv2k8s-test
spec:
hosts:
- web.zaalion.com
gateways:
- public-gateway
http:
- route:
- destination:
host: web.akv2k8s-test.svc.cluster.local
port:
number: 80
EOF
我可以如下所示访问服务
export EXTERNAL_IP=$(kubectl get svc istio-ingressgateway -n istio-system -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
curl -v --resolve web.zaalion.com:443:$EXTERNAL_IP --cacert cert2.crt https://web.zaalion.com
我知道为什么Jaeger UI中未列出该服务吗?
解决方法
根据istio documentation
要查看跟踪数据,必须将请求发送到服务。请求数量取决于Istio的采样率。您在安装Istio时设置此速率。默认采样率为1%。在显示第一条跟踪之前,您至少需要发送100个请求。您能否尝试发送至少100个请求并检查其是否有效?
如果您不想更改默认采样率,则可以使用istio documentation。
自定义跟踪采样
采样率选项可用于控制将多少百分比的请求报告给您的跟踪系统。应根据网格中的流量和要收集的跟踪数据量进行配置。默认比率是1%。
要将默认随机抽样修改为50,请将以下选项添加到您的tracing.yaml文件中。
http://localhost
采样率应在0.0到100.0的范围内,精度为0.01。例如,要跟踪每10000个请求中的5个请求,请在此处使用0.05作为值。