diff --git a/test/agent/Dockerfile b/test/agent/Dockerfile new file mode 100644 index 00000000000..ad614e9f9a8 --- /dev/null +++ b/test/agent/Dockerfile @@ -0,0 +1,34 @@ +FROM public.ecr.aws/bitnami/golang:1.13 as builder + +WORKDIR /workspace +ENV GOPROXY direct + +COPY go.mod go.mod +COPY go.sum go.sum + +RUN go mod download + +COPY cmd cmd +COPY pkg pkg + +# Package all testing binaries into one docker file +# which can be used for different test scenarios + +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build \ + -a -o traffic-server cmd/traffic-server/main.go + +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build \ + -a -o traffic-client cmd/traffic-client/main.go + +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build \ + -a -o networking cmd/networking/main.go + +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build \ + -a -o metric-server cmd/metric-server/main.go + +FROM public.ecr.aws/amazonlinux/amazonlinux:2 +RUN yum update -y && \ + yum clean all + +WORKDIR / +COPY --from=builder /workspace/ . diff --git a/test/agent/Makefile b/test/agent/Makefile new file mode 100644 index 00000000000..ea03f9bd27a --- /dev/null +++ b/test/agent/Makefile @@ -0,0 +1,41 @@ +# Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"). You +# may not use this file except in compliance with the License. A copy of +# the License is located at +# +# http://aws.amazon.com/apache2.0/ +# +# or in the "license" file accompanying this file. This file is +# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF +# ANY KIND, either express or implied. See the License for the specific +# language governing permissions and limitations under the License. + +VERSION ?= $(shell git describe --tags --always || echo "unknown") +IMAGE_NAME = amazon/amazon-k8s-cni/test/agent +REPO=$(AWS_ACCOUNT).dkr.ecr.$(AWS_REGION).amazonaws.com/$(IMAGE_NAME) +IMAGE ?= $(REPO):$(VERSION) + +fmt: + go fmt . + +# Run go vet against code +vet: + go vet . + +docker-build: check-env + docker build . -t ${IMAGE} + +docker-push: check-env + docker push ${IMAGE} + +check-env: + @:$(call check_var, AWS_ACCOUNT, AWS account ID for publishing docker images) + @:$(call check_var, AWS_REGION, AWS region for publishing docker images) + +check_var = \ + $(strip $(foreach 1,$1, \ + $(call __check_var,$1,$(strip $(value 2))))) +__check_var = \ + $(if $(value $1),, \ + $(error Undefined variable $1$(if $2, ($2)))) \ No newline at end of file diff --git a/test/agent/README.md b/test/agent/README.md new file mode 100644 index 00000000000..cb426ac63be --- /dev/null +++ b/test/agent/README.md @@ -0,0 +1,71 @@ +###Test Agent +The test agent contains multiple binaries that are used by Ginkgo Automation tests. + +###List of Go Binaries in the Agent + +Currently the agent supports the following Go Binaries. + +####Traffic Testing + +For traffic validation across multiple pods we have the following 3 Go binaries. + +**traffic-server** + +The traffic server starts a TCP/UDP server that listens for incoming traffic from multiple clients. + +**traffic-client** + +The traffic client takes a list of servers as input parameter and tests connection to those server and finally prints the success/failure status to stdout and optionally pushes the results to metric server. + +**metric-server** + +The metric server is supposed collects metrics from all traffic clients and allow the test suite to just query the metric server instead of getting stdout for each client. + +One way to run the traffic test is as follows +- Deploy N Servers +- Deploy M Client pods and pass the IP Address of N Servers as input. +- Query the metric server to see the Success/Failure Rate. + +####Networking Testing +Networking testing binary must be invoked on a pod that runs in Host Networking mode. It is capable of testing the Pod networking is setup correctly and once the Pod has been deleted the networking has been teared down correctly by the CNI Plugin. + +###How to test the Agent locally +Apart from running the tests on your local environment. For some test cases where we want to run test on Pod (for instance Pod networking tests) we can copy over the binary to the Pod and execute it. For e2e testing, we can push docker image to ECR and use the image in automation test suite. + +####Running individual test component inside a Pod +- While development you could generate the binary for the component you want to test. Let's say you would like to test the pod networking setup on a host network pod. + ``` + COMPONENT=networking #Example, when testing networking go binary + + CGO_ENABLED=0 \ + GOOS=linux \ + GOARCH=amd64 \ + GO111MODULE=on \ + go build -o $COMPONENT cmd/$COMPONENT/main.go + ``` +- Copy the binary to your tester pod. + ``` + TESTER_POD= + kubectl cp $COMPONENT TESTER_POD:/tmp/ + ``` +- Execute the binary by doing an exec into the pod and see the desired results. + ``` + kubectl exec -ti $TESTER_POD sh + ./tmp/ -- + ``` + +####Running the docker Image + +Run the following command to build the agent image and push to ECR. This needs an existing repository with name "amazon/amazon-k8s-cni/test/agent" +``` +AWS_ACCOUNT= AWS_REGION= make docker-build docker-push +``` +Change the agent image in the Go code and run the test case as usual. + +####Finalizing the changes +- Submit PR with the change to Agent. +- One of the AWS Maintainer will push the image to ECR (Till we have pipeline that does this for us) +- Use the updated image tag wherever you want to update the docker image in automation tests. + +### Future Improvements +Currently the aws-vpc-cni Maintainers have to manually push the ECR image after any change to agent. In future, we would like to push a new image using a pipeline on any updates to the agent directory. diff --git a/test/agent/cmd/metric-server/main.go b/test/agent/cmd/metric-server/main.go new file mode 100644 index 00000000000..f19351be2d3 --- /dev/null +++ b/test/agent/cmd/metric-server/main.go @@ -0,0 +1,59 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package main + +import ( + "encoding/json" + "log" + "net/http" + + "github.com/aws/amazon-vpc-cni-k8s/test/agent/pkg/input" +) + +var connectivityMetric []input.TestStatus + +// metric server stores metrics from test client and returns the aggregated metrics to the +// automation test +func main() { + http.HandleFunc("/submit/metric/connectivity", submitConnectivityMetric) + http.HandleFunc("/get/metric/connectivity", getConnectivityMetric) + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +// adds the metric to list of metrics +func submitConnectivityMetric(_ http.ResponseWriter, r *http.Request) { + decoder := json.NewDecoder(r.Body) + + var status input.TestStatus + err := decoder.Decode(&status) + + if err != nil { + log.Printf("failed to decode the request body: %v", err) + return + } + + log.Printf("received metric %+v", status) + connectivityMetric = append(connectivityMetric, status) +} + +// returns the list of metrics +func getConnectivityMetric(w http.ResponseWriter, r *http.Request) { + metricByte, err := json.Marshal(connectivityMetric) + if err != nil { + log.Printf("failed to marshall: %v", err) + return + } + w.Header().Set("Content-Type", "application/json") + w.Write(metricByte) +} diff --git a/test/agent/cmd/networking/main.go b/test/agent/cmd/networking/main.go new file mode 100644 index 00000000000..8285d9085f3 --- /dev/null +++ b/test/agent/cmd/networking/main.go @@ -0,0 +1,60 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package main + +import ( + "encoding/json" + "flag" + "log" + + "github.com/aws/amazon-vpc-cni-k8s/test/agent/cmd/networking/tester" +) + +func main() { + var podNetworkingValidationInput tester.PodNetworkingValidationInput + var podNetworkingValidationInputString string + var shouldTestSetup bool + var shouldTestCleanup bool + + flag.StringVar(&podNetworkingValidationInputString, "pod-networking-validation-input", "", "json string containing the array of pods whose networking needs to be validated") + flag.BoolVar(&shouldTestCleanup, "test-cleanup", false, "bool flag when set to true tests that networking is teared down after pod has been deleted") + flag.BoolVar(&shouldTestSetup, "test-setup", false, "bool flag when set to true tests the networking is setup correctly after pod is running") + + flag.Parse() + + if shouldTestCleanup && shouldTestSetup { + log.Fatal("can only test setup or cleanup at one time") + } + + err := json.Unmarshal([]byte(podNetworkingValidationInputString), &podNetworkingValidationInput) + if err != nil { + log.Fatalf("failed to unmarshall json string %s: %v", podNetworkingValidationInputString, err) + } + + log.Printf("list of pod against which test will be run %v", podNetworkingValidationInput.PodList) + + if shouldTestSetup { + log.Print("testing networking is setup for regular pods") + err := tester.TestNetworkingSetupForRegularPod(podNetworkingValidationInput) + if err != nil { + log.Fatalf("found 1 or more pod setup validation failure: %v", err) + } + } else { + log.Print("testing network is teared down for regular pods") + err := tester.TestNetworkTearedDownForRegularPods(podNetworkingValidationInput) + if err != nil { + log.Fatalf("found 1 or more pod teardown validation failure: %v", err) + } + } +} diff --git a/test/agent/cmd/networking/tester/input.go b/test/agent/cmd/networking/tester/input.go new file mode 100644 index 00000000000..2e6f8b1455a --- /dev/null +++ b/test/agent/cmd/networking/tester/input.go @@ -0,0 +1,35 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package tester + +type PodNetworkingValidationInput struct { + // CIDR Range associated with the VPC + VPCCidrRange []string + // Prefix for the veth pair on host network ns + VethPrefix string + // List of pod to validate the networking + PodList []Pod +} + +type Pod struct { + // Name of the pod + PodName string + // Namespace of the pod, used to generate the Link + PodNamespace string + // IPv4 Address of the pod + PodIPv4Address string + // Set to true when the Pod is scheduled on IP + // from the Secondary ENI + IsIPFromSecondaryENI bool +} diff --git a/test/agent/cmd/networking/tester/network.go b/test/agent/cmd/networking/tester/network.go new file mode 100644 index 00000000000..3be897483a6 --- /dev/null +++ b/test/agent/cmd/networking/tester/network.go @@ -0,0 +1,267 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package tester + +import ( + "crypto/sha1" + "encoding/hex" + "fmt" + "log" + "net" + "reflect" + "sort" + "strings" + + "github.com/vishvananda/netlink" + "golang.org/x/sys/unix" +) + +// TestNetworkingSetupForRegularPod tests networking set by the CNI Plugin for a list of Pod is as +// expected +func TestNetworkingSetupForRegularPod(podNetworkingValidationInput PodNetworkingValidationInput) []error { + // Get the list of IP rules + ruleList, err := netlink.RuleList(netlink.FAMILY_V4) + if err != nil { + log.Fatalf("failed to list ip rules %v", err) + } + + // Sort the VPC CIDR Range as it will be compared with the + // IP Routes for Pods using Secondary ENI IPv4Address + sort.Strings(podNetworkingValidationInput.VPCCidrRange) + + // Do validation for each Pod and if validation fails instead of failing + // entire test add errors to a list for all the failing Pods + var validationErrors []error + + secondaryRouteTableIndex := make(map[int]bool) + + // For each Pod validate the Pod networking + for _, pod := range podNetworkingValidationInput.PodList { + // For each pod categorize the rules into rules for the main route table + // and for non main route table + var mainTableRules []netlink.Rule + var nonMainTableRules []netlink.Rule + + podIP := net.ParseIP(pod.PodIPv4Address) + + log.Printf("testing for Pod name: %s Namespace: %s, IP: %s, IP on secondary ENI: %t", + pod.PodName, pod.PodNamespace, pod.PodIPv4Address, pod.IsIPFromSecondaryENI) + + // Get the veth pair for pod in host network namespace + hostVethName := getHostVethPairName(pod, podNetworkingValidationInput.VethPrefix) + link, err := netlink.LinkByName(hostVethName) + if err != nil { + validationErrors = append(validationErrors, + fmt.Errorf("failed to find netlink %s: %v", hostVethName, err)) + continue + } + + // Verify IP Link for the Pod is UP + isLinkUp := strings.Contains(link.Attrs().Flags.String(), "up") + if !isLinkUp { + validationErrors = append(validationErrors, + fmt.Errorf("veth pair on host side is not up %s", link.Attrs().Flags.String())) + continue + } + + log.Printf("found veth pair %s in host network namespace in up state with index %d", + hostVethName, link.Attrs().Index) + + // Get the IP Rules to/from the Pod IP and categorize them into main and non-main table rules + for _, rule := range ruleList { + isRuleToOrFromPod := isRuleToOrFromIP(rule, podIP) + if rule.Table == unix.RT_TABLE_MAIN && isRuleToOrFromPod { + mainTableRules = append(mainTableRules, rule) + } else if isRuleToOrFromPod { + nonMainTableRules = append(nonMainTableRules, rule) + } + } + + // Both Pod with IP from Primary and Secondary ENI will have 1 rule for main route table + if len(mainTableRules) != 1 { + validationErrors = append(validationErrors, + fmt.Errorf("found 0 or more than 1 rule for main route table: %+v", + mainTableRules)) + continue + } + + log.Printf("found rule for main route table to %v with priority %s", + mainTableRules[0].Dst, mainTableRules[0].IifName) + + // Verify main table route for pod IP go through the veth pair when destination is Pod IP + toContainerRoutes, err := netlink.RouteListFiltered(netlink.FAMILY_V4, + &netlink.Route{ + Dst: mainTableRules[0].Dst, + }, netlink.RT_FILTER_DST) + if err != nil { + fmt.Errorf("failed to find ip rule with destination %s: %v", podIP.String(), err) + } + + if len(toContainerRoutes) != 1 { + validationErrors = append(validationErrors, + fmt.Errorf("found 0 or more than 1 route to the container %s: %v", + podIP.String(), toContainerRoutes)) + continue + } + + // Verify that the link index for the route is the same as the veth pair index + if toContainerRoutes[0].LinkIndex != link.Attrs().Index { + validationErrors = append(validationErrors, + fmt.Errorf("the link index for to contianer route %d is different from"+ + " veth index %d", toContainerRoutes[0].LinkIndex, link.Attrs().Index)) + continue + } + + log.Printf("found route to %v with link index %d", + toContainerRoutes[0].Dst, toContainerRoutes[0].LinkIndex) + + // Pod with IP from Secondary ENI will have additional rule for destination to each + // VPC Cidr block + if pod.IsIPFromSecondaryENI { + var destinationCidrRange []string + for _, rule := range nonMainTableRules { + destinationCidrRange = append(destinationCidrRange, rule.Dst.String()) + // Add the secondary route table Index, we will do validation later + secondaryRouteTableIndex[rule.Table] = true + } + sort.Strings(destinationCidrRange) + // Validate there is one rule for each VPC CIDR Range + if !reflect.DeepEqual(destinationCidrRange, podNetworkingValidationInput.VPCCidrRange) { + validationErrors = append(validationErrors, + fmt.Errorf("failed to find route to vpc cidr: %v", destinationCidrRange)) + continue + } + log.Printf("validated all routes for VPC CIDR %v are present for secondary ENI", + destinationCidrRange) + } + log.Printf("validation for pod %s/%s succeeded", pod.PodNamespace, pod.PodName) + } + + // Finally validate that the route table for secondary ENI has the right routes + for index, _ := range secondaryRouteTableIndex { + routes, err := netlink.RouteListFiltered(netlink.FAMILY_V4, + &netlink.Route{ + Table: index, + }, netlink.RT_FILTER_TABLE) + if err != nil { + validationErrors = append(validationErrors, + fmt.Errorf("failed to find route for table with index %d:%v", index, err)) + continue + } + + // Route 1 should route all traffic through Gateway via Secondary ENI + gateway := routes[0].Gw + secondaryENIIndex := routes[0].LinkIndex + + // Route 2 should route all traffic intended for Gateway IP through Secondary ENI + if !routes[1].Dst.IP.Equal(gateway) || + routes[1].LinkIndex != secondaryENIIndex { + validationErrors = append(validationErrors, + fmt.Errorf("found invalid route for secondary ENI %v", err)) + continue + } + log.Printf("validated route table for secondary ENI %d has right routes", index) + } + + return validationErrors +} + +// TestNetworkTearedDownForRegularPods test pod networking is correctly teared down by the CNI Plugin +// The test assumes that the IP assigned to the older Pod is not assigned to a new Pod while this test +// is being executed +func TestNetworkTearedDownForRegularPods(podNetworkingValidationInput PodNetworkingValidationInput) []error { + // Get the list of IP rules + ruleList, err := netlink.RuleList(netlink.FAMILY_V4) + if err != nil { + log.Fatalf("failed to list ip rules %v", err) + } + + var validationError []error + + for _, pod := range podNetworkingValidationInput.PodList { + + podIP, podIPNet, err := net.ParseCIDR(pod.PodIPv4Address + "/32") + if err != nil { + validationError = append(validationError, + fmt.Errorf("failed to parse pod IP %s", pod.PodIPv4Address)) + continue + } + + log.Printf("testing for Pod name: %s Namespace: %s, IP: %s, IP on secondary ENI: %t", + pod.PodName, pod.PodNamespace, pod.PodIPv4Address, pod.IsIPFromSecondaryENI) + + // Make sure the veth pair doesn't exist anymore + hostVethName := getHostVethPairName(pod, podNetworkingValidationInput.VethPrefix) + link, err := netlink.LinkByName(hostVethName) + if err == nil { + validationError = append(validationError, + fmt.Errorf("found an existing veth pair for the pod %s: %v", pod.PodName, link)) + continue + } + log.Printf("veth pair %s not found for the pod: %v", hostVethName, err) + + // Make sure there's no more rules either to or from the Pod's IPv4 Address + var ruleFound bool + for _, rule := range ruleList { + if isRuleToOrFromIP(rule, podIP) { + validationError = append(validationError, + fmt.Errorf("found one ip rule to/from the pod IP %s: %v", pod.PodIPv4Address, rule)) + ruleFound = true + break + } + } + + // Test the next pod if even a single leaked rule if found + if ruleFound { + continue + } + + log.Printf("found no rules for the pod's IP %s", pod.PodIPv4Address) + + // Make sure there's no route to Pod IP Address + toContainerRoutes, err := netlink.RouteListFiltered(netlink.FAMILY_V4, + &netlink.Route{ + Dst: podIPNet, + }, netlink.RT_FILTER_DST) + if err != nil { + validationError = append(validationError, + fmt.Errorf("failed to find routes to pod %s: %v", pod.PodName, err)) + continue + } + + if len(toContainerRoutes) != 0 { + validationError = append(validationError, + fmt.Errorf("found one or more ip route for pod %s: %v", pod.PodName, toContainerRoutes)) + continue + } + + log.Printf("no leaked resource found for the pod %s/%s", pod.PodNamespace, pod.PodName) + } + + return validationError +} + +func isRuleToOrFromIP(rule netlink.Rule, ip net.IP) bool { + if (rule.Src != nil && rule.Src.IP.Equal(ip)) || + (rule.Dst != nil && rule.Dst.IP.Equal(ip)) { + return true + } + return false +} + +func getHostVethPairName(input Pod, vethPrefix string) string { + h := sha1.New() + h.Write([]byte(fmt.Sprintf("%s.%s", input.PodNamespace, input.PodName))) + return fmt.Sprintf("%s%s", vethPrefix, hex.EncodeToString(h.Sum(nil))[:11]) +} diff --git a/test/agent/cmd/traffic-client/main.go b/test/agent/cmd/traffic-client/main.go new file mode 100644 index 00000000000..7a205a06cb3 --- /dev/null +++ b/test/agent/cmd/traffic-client/main.go @@ -0,0 +1,153 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package main + +import ( + "bytes" + "encoding/json" + "flag" + "fmt" + "log" + "net" + "net/http" + "strings" + "time" + + "github.com/aws/amazon-vpc-cni-k8s/test/agent/pkg/input" +) + +var success, failure int + +const ( + ClientRequestData = "message from the client!" + TcpTimeout = time.Second * 2 +) + +// Queries the list of server address provided and posts the success and failure rate in stdout +// If a metric aggregator address is provided then the response is posted to aggregator +func main() { + // List of server separated by comma + var serverListCsv string + // Port on which all the server are listening + var serverPort string + // Mode on which the server is listening + var connectionMode string + // Aggregates the metrics from all clients into a single place + var metricAggregatorAddr string + + flag.StringVar(&connectionMode, "server-listen-mode", "tcp", "supported server mode - tcp,udp") + flag.StringVar(&serverListCsv, "server-list-csv", "", "server list address with comma separated value") + flag.StringVar(&serverPort, "server-port", "2273", "port on which the servers are listening") + flag.StringVar(&metricAggregatorAddr, "metric-aggregator-addr", "", "optional aggregator where each client can post their metrics") + + flag.Parse() + + serverList := strings.Split(serverListCsv, ",") + + log.Printf("will test connection %s to the list of server %v on port %s", + connectionMode, serverList, serverPort) + + for _, server := range serverList { + serverAddr := fmt.Sprintf("%s:%s", server, serverPort) + + // Get connection based on the server mode - tcp/udp + conn, err := getConnection(serverAddr, connectionMode) + if err != nil { + log.Printf("failed to get connection to server %s: %v", serverAddr, err) + failure++ + continue + } + + // Send data to the server and wait for response from the server (this sequence is + // expected from the server) + err = sendAndReceiveResponse(conn, serverAddr) + if err != nil { + log.Printf("failed to send/receive response from server %s: %v", serverAddr, err) + failure++ + continue + } + + // Connection successfully tested, mark as success and test next server + success++ + + } + + fmt.Printf("Success: %d, Failure: %d", success, failure) + + // Report metrics to the aggregator address from all the clients if provided + // Otherwise the results can be read from stdout + if metricAggregatorAddr != "" { + body, _ := json.Marshal(input.TestStatus{ + SuccessCount: success, + FailureCount: failure, + }) + resp, err := http.Post(metricAggregatorAddr, "application/json", bytes.NewBuffer(body)) + if err != nil { + log.Fatalf("failed to post data to metric aggregator %s: %v", + metricAggregatorAddr, err) + } + if resp.StatusCode != http.StatusOK { + log.Fatalf("received non OK status code from the server%s: %d", + metricAggregatorAddr, resp.StatusCode) + } + log.Printf("successfully posted data to metric aggregator %v", resp) + } +} + +func getConnection(serverAddr string, serverMode string) (net.Conn, error) { + if serverMode == "tcp" { + conn, err := net.DialTimeout("tcp", serverAddr, TcpTimeout) + if err != nil { + return nil, fmt.Errorf("failed to connect to server %s: %v", serverAddr, err) + } + return conn, nil + } + if serverMode == "udp" { + udpAddr, err := net.ResolveUDPAddr("udp", serverAddr) + if err != nil { + return nil, fmt.Errorf("failed to resolve the server address: %v", err) + } + + conn, err := net.DialUDP("udp", nil, udpAddr) + if err != nil { + return nil, fmt.Errorf("failed to connect to udp server: %v", err) + } + return conn, nil + } + + return nil, fmt.Errorf("invalid server mode provided %s", serverMode) +} + +func sendAndReceiveResponse(conn net.Conn, serverAddr string) error { + defer conn.Close() + + data := []byte(ClientRequestData) + + _, err := conn.Write(data) + if err != nil { + return fmt.Errorf("failed to write to server: %v", err) + } + + log.Printf("successfully sent data to the server %s", serverAddr) + + buffer := make([]byte, 1024) + respLen, err := conn.Read(buffer) + if err != nil || respLen == 0 { + return fmt.Errorf("failed to read from the server, resp length %d: %v", respLen, err) + } + + log.Printf("successfully recieved response from server %s: %s", serverAddr, string(buffer)) + + return nil +} diff --git a/test/agent/cmd/traffic-server/main.go b/test/agent/cmd/traffic-server/main.go new file mode 100644 index 00000000000..5869fe68b59 --- /dev/null +++ b/test/agent/cmd/traffic-server/main.go @@ -0,0 +1,134 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package main + +import ( + "flag" + "fmt" + "log" + "net" +) + +const ServerResponse = "message from the server!" + +// Server that listens to client connection and first reads data and then writes data to the client. +func main() { + // Supported modes are tcp, udp + var serverMode string + // Port on which Server will listen for incoming connections + var serverPort string + + flag.StringVar(&serverMode, "server-mode", "tcp", "server mode, accepts tcp or udp") + flag.StringVar(&serverPort, "server-port", "2273", "port on which you want to start the server") + + flag.Parse() + + addr := fmt.Sprintf("%s:%s", "localhost", serverPort) + + if serverMode == "tcp" { + StartTCPServer(addr) + } else if serverMode == "udp" { + StartUDPServer(addr) + } else { + log.Fatal("invalid server mode, can accept tcp/udp only") + } +} + +func StartTCPServer(serverAddr string) { + log.Printf("starting TCP listener on %s", serverAddr) + + listener, err := net.Listen("tcp", serverAddr) + if err != nil { + log.Fatalf("failed to start server: %v", err) + } + + defer listener.Close() + + for { + log.Printf("waiting for incomming connection") + conn, err := listener.Accept() + if err != nil { + log.Printf("failed to accept connection %v", err) + continue + } + + log.Printf("succesffuly established connection with client %v", conn.RemoteAddr()) + + err = readAndWriteFromConnection(conn) + if err != nil { + log.Printf("failed to read/write from connection: %v", err) + continue + } + + log.Printf("sucessfully read and wrote response to tcp client %v", conn.RemoteAddr()) + } +} + +func readAndWriteFromConnection(conn net.Conn) error { + defer conn.Close() + + buff := make([]byte, 1024) + _, err := conn.Read(buff) + if err != nil { + return fmt.Errorf("failed to read from connection stream: %v", err) + } + + log.Printf("successfully received message from client %s", string(buff)) + + _, err = conn.Write([]byte(ServerResponse)) + if err != nil { + return fmt.Errorf("failed to write back to the client: %v", err) + } + + log.Printf("successfully wrote back to the client") + + return nil +} + +func StartUDPServer(serverAddr string) { + log.Printf("starting UDP listener on address %s", serverAddr) + + udpAddr, err := net.ResolveUDPAddr("udp", serverAddr) + if err != nil { + log.Fatalf("failed to resolve udp address: %v", err) + } + + conn, err := net.ListenUDP("udp", udpAddr) + if err != nil { + log.Fatalf("failed to lisent for udp packets: %v", err) + } + defer conn.Close() + + for { + log.Print("waiting for incoming requests") + + buffer := make([]byte, 1024) + _, clientAddr, err := conn.ReadFromUDP(buffer) + if err != nil { + log.Printf("failed to read udp packets: %v", err) + continue + } + + log.Printf("successfully recieved request from remote client %v: %s", + clientAddr.String(), string(buffer)) + + _, err = conn.WriteToUDP([]byte(ServerResponse), clientAddr) + if err != nil { + log.Printf("failed to write back to the client: %v", err) + continue + } + + log.Printf("sucessfully wrote back to remote client %v", clientAddr) + } +} diff --git a/test/agent/go.mod b/test/agent/go.mod new file mode 100644 index 00000000000..d0a12f23676 --- /dev/null +++ b/test/agent/go.mod @@ -0,0 +1,9 @@ +module github.com/aws/amazon-vpc-cni-k8s/test/agent + +go 1.14 + +require ( + github.com/go-kit/kit v0.10.0 + github.com/vishvananda/netlink v1.1.0 + golang.org/x/sys v0.0.0-20210426230700-d19ff857e887 +) diff --git a/test/agent/go.sum b/test/agent/go.sum new file mode 100644 index 00000000000..48b6901a6c1 --- /dev/null +++ b/test/agent/go.sum @@ -0,0 +1,364 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/Knetic/govaluate 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h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= +sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU= diff --git a/test/agent/pkg/input/input.go b/test/agent/pkg/input/input.go new file mode 100644 index 00000000000..0cbed1db7a0 --- /dev/null +++ b/test/agent/pkg/input/input.go @@ -0,0 +1,19 @@ +// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"). You may +// not use this file except in compliance with the License. A copy of the +// License is located at +// +// http://aws.amazon.com/apache2.0/ +// +// or in the "license" file accompanying this file. This file is distributed +// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either +// express or implied. See the License for the specific language governing +// permissions and limitations under the License. + +package input + +type TestStatus struct { + SuccessCount int + FailureCount int +}