if err != nil { return "", fmt.Errorf("invalid chart URL: %s", srcURL) } data, err := httprequest.Get(u.String()) if err != nil { return "", err } name := filepath.Base(u.Path) destFile := filepath err := os.Create(fileName) if err != nil { panic(err) } f.Write([]byte(fileData)) f.Close() // Get FileInfo fi, err := os.Stat(fileName) if err != nil { panic(err) } // Create header header, err := can lead to system resource exhaustion if a large byte buffer is read into memory. Case 1 A general Get function that makes an http request and reads the entire response into memory: https://github.com/

command (run with administrative access) and use it below in place of $GATEWAY kubectl -n istio-system get service istio-ingressgateway \ -o jsonpath='{.status.loadBalancer.ingress[0].ip}' 3. In a separate demo: enables a variety of extra features • empty: provides a template • minimal: minimal config to get an operational deployment • preview: enables experimental features The “default” profile (used to for debugging (including sudo) which are not necessary for Istio’s operations: RUN apt-get update && \ apt-get install --no-install-recommends -y \ ca-certificates \ curl \ iptables \ iproute2 \ iputils-ping

4. Cert signed with SPIFFE format Istio-proxy CA server #IstioCon Istio identity – how to get configuration ● Format: "spiffe:///ns//sa/” ● istioctl proxy-config selector: matchLabels: app: productpage rules: - to: - operation: methods: ["GET"] apiVersion: "security.istio.io/v1beta1" kind: "AuthorizationPolicy" metadata: name: "details-viewer" ["cluster.local/ns/default/sa/bookinfo-productpage"] to: - operation: methods: ["GET"]" apiVersion: "security.istio.io/v1beta1" kind: "AuthorizationPolicy" metadata: name: "reviews-viewer"

httpbin.ns1.svc.cluster.local 2. DNS response – 10.4.4.4 http req to 10.4.4.4 GET /status/200 http req to 172.16.1.3 GET /status/200 httpbin.ns1.svc.cluster.local SVC IP: 10.4.4.4 #IstioCon DNS Issues does not use the agent’s DNS cache. http req to 10.4.4.4 GET /status/200 httpbin.ns1.svc.cluster.local SVC IP: 10.4.4.4 http req to 172.16.1.3 GET /status/200 #IstioCon V1.8 Smart DNS Proxy: A Step Further DNS_AUTO_ALLOCATE ○ Decoupled from DNS_CAPTURE ● Documents available ○ Virtual Machine Installation to get started. ○ Virtual Machine Architecture to learn about the high level architecture of Istio’s virtual

chment ○ ... ● Fault Injection with application layer error codes ○ HTTP status code ○ Redis Get error ○ ... ● Observability with application layer metrics ○ HTTP status code ○ Thrift request Data #IstioCon What Do We Get From Istio? IP Data IP Header TCP Data TCP Header Layer-7 Header Data Traffic Management for HTTP/gRPC - all good ● We get all the capabilities we mentioned beginning of the port name because it's a TCP service from the standpoint of Istio. Visit Github to get more information https://github.com/aeraki-framework/aeraki #IstioCon Aeraki Configuration Example:

CNI Kubelet Start a pausing pod Kubelet invoke CNI plugins CNI plugins setup ip for pod Pod could get started in here and bypassing istio sidecar proxy(race condition) Istio CNI install sidecar network CNI Kubelet Start a pausing pod Kubelet invoke CNI plugins CNI plugins setup ip for pod Pod could get started in here and bypassing istio sidecar proxy(race condition) Istio CNI install sidecar network controller No need for istio init container (faster startup speed) Taint Node when istio CNI did not get installed, and unTaint node when they are ready Inspired by kubernetes planned extension (Node Readiness

Page 20 生产环境问题分析及解决方法（1） 503 UF问题分析 现象 日志报错503 UF，等待8S后建立连接失败。 日志如下： [2021-02-09T06:29:10.489Z] "GET /v1/xx/xx/xx/xx HTTP/1.1" 503 UF "-" "-" 0 91 288 - "100.95.165.3" “xx-xx" "513cca39-1ea7-47db- 8c04-a5827464ce22" src1:sport1,tcp, pod2ip:8080 src1:sport1,tcp, pod2ip:15006 现象 日志报错503 UO 日志如下： [2021-03-31T11:16:55.538Z] "GET /aaabbbcccddd HTTP/1.1" 503 UO"-" "-" 0 81 5 - "-" "-" "3c2a392c-56fc-9d8c-9895-f657a4444679" "test-503-svc:8080" 通过pilot-agent：访问Envoy 15000端口，指定url获取： • kubectl exec -it $podname -c istio-proxy -- pilot-agent request GET /config_dump > config.json • 查看listener：istioctl pc listener backend-welink-649fdfd55d-2xhzw --port

envoy_on_response(request_handle) #IstioCon Who and where to reroute ? #IstioCon The contract GET / HTTP/1.1 Host: example.com User-Agent: curl/7.64.1 X-devroute: { “foo”:”192.168.1.12:8001” } implementation 1 function envoy_on_request(request_handle) 2 contract = request_handle:headers():get("x-devroute") 3 if string.match(contract, "foo") == nil then 4 return 5 end #IstioCon

canaries Build confidence in the system and understanding of Istio. Then you can onboard some users, get feedback, improve, rinse and repeat. 31 A full mesh is utopian, know what you need only Stabilizing protocol specific traffic sniffing (i.e. gRPC call discovery) to find out dependencies ● eBPF magic to get service calls? We use the first approach currently as it is protocol-agnostic and works before live

place to start committing. #IstioCon Connect With the Community ● Working groups - great way to get to know the community ● Join the Discuss, Slack, and Team Drive ● Meeting Agendas and Recordings