/
pod.go
359 lines (299 loc) · 11.5 KB
/
pod.go
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package mtest
import (
"crypto/sha1"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"net"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
)
// TestPod tests pod networking
func TestPod() {
BeforeEach(func() {
initializeCoil()
_, stderr, err := kubectl("create", "namespace", "dmz")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
})
AfterEach(func() {
_, stderr, err := kubectl("delete", "namespace", "dmz")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
cleanCoil()
})
It("should assign PodIP using address pool", func() {
addressPool := "10.0.1.0/24"
By("creating address pool")
coilctlSafe("pool", "create", "default", addressPool, "2")
coilctlSafe("pool", "show", "--json", "default", addressPool)
By("deployment 1st nginx Pods")
_, stderr, err := kubectl("run", "nginx1", "--replicas=2", "--image=nginx")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
By("waiting pods are ready")
Eventually(func() error {
stdout, stderr, err := kubectl("get", "deployments/nginx1", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
deployment := new(appsv1.Deployment)
err = json.Unmarshal(stdout, deployment)
if err != nil {
return err
}
if deployment.Status.ReadyReplicas != 2 {
return errors.New("ReadyReplicas is not 2")
}
return nil
}).Should(Succeed())
By("checking nginx1 PodIPs are assigned")
stdout, stderr, err := kubectl("get", "pods", "--selector=run=nginx1", "-o=json")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
podList := new(corev1.PodList)
err = json.Unmarshal(stdout, podList)
Expect(err).NotTo(HaveOccurred())
_, subnet, err := net.ParseCIDR(addressPool)
Expect(err).NotTo(HaveOccurred())
for _, pod := range podList.Items {
By("checking PodIP is in address pool")
ip := net.ParseIP(pod.Status.PodIP)
Expect(subnet.Contains(ip)).To(BeTrue(), "subnet: %s, ip: %s", subnet, ip)
By("checking veth for Pod exists in node")
stdout, _, err := execAt(pod.Status.HostIP, "ip", "-d", "route", "show", ip.String())
Expect(err).NotTo(HaveOccurred())
Expect(stdout).NotTo(BeEmpty())
By("checking PodIP is advertised as routing table by coild")
stdout, _, err = execAt(pod.Status.HostIP, "ip", "route", "show", "table", "119", ip.String()+"/30")
Expect(err).NotTo(HaveOccurred())
Expect(stdout).NotTo(BeEmpty())
}
By("deployment 2nd nginx Pods")
_, stderr, err = kubectl("run", "nginx2", "--replicas=2", "--image=nginx")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
By("waiting pods are ready")
Eventually(func() error {
stdout, stderr, err := kubectl("get", "deployments/nginx2", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
deployment := new(appsv1.Deployment)
err = json.Unmarshal(stdout, deployment)
if err != nil {
return err
}
if deployment.Status.ReadyReplicas != 2 {
return errors.New("ReadyReplicas is not 2")
}
return nil
}).Should(Succeed())
By("checking nginx1 PodIPs are released")
_, stderr, err = kubectl("delete", "deployments/nginx1")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
By("waiting nginx1 pods are deleted")
Eventually(func() error {
stdout, stderr, err := kubectl("get", "pods", "--selector=run=nginx1", "-o=json")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
podList := new(corev1.PodList)
err = json.Unmarshal(stdout, podList)
Expect(err).NotTo(HaveOccurred())
if len(podList.Items) > 0 {
return errors.New("pods --selector=run=nginx1 are remaining")
}
return nil
}).Should(Succeed())
for _, pod := range podList.Items {
By("checking veth for nginx1 Pod does not exist in node")
ip := net.ParseIP(pod.Status.PodIP)
stdout, _, err := execAt(pod.Status.HostIP, "ip", "-d", "route", "show", ip.String())
Expect(err).NotTo(HaveOccurred())
Expect(stdout).To(BeEmpty())
}
By("checking PodIPs are reused")
_, stderr, err = kubectl("run", "nginx1", "--replicas=2", "--image=nginx")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
Eventually(func() error {
stdout, stderr, err := kubectl("get", "deployments/nginx1", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
deployment := new(appsv1.Deployment)
err = json.Unmarshal(stdout, deployment)
if err != nil {
return err
}
if deployment.Status.ReadyReplicas != 2 {
return errors.New("ReadyReplicas is not 2")
}
return nil
}).Should(Succeed())
By("checking PodIPs are assigned")
stdout, stderr, err = kubectl("get", "pods", "--selector=run=nginx1", "-o=json")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
podList2 := new(corev1.PodList)
err = json.Unmarshal(stdout, podList2)
Expect(err).NotTo(HaveOccurred())
ips1 := map[string]string{
podList.Items[0].Status.PodIP: podList.Items[0].Status.HostIP,
podList.Items[1].Status.PodIP: podList.Items[1].Status.HostIP,
}
ips2 := map[string]string{
podList2.Items[0].Status.PodIP: podList2.Items[0].Status.HostIP,
podList2.Items[1].Status.PodIP: podList2.Items[1].Status.HostIP,
}
Expect(ips1).To(Equal(ips2))
By("checking veth name")
for _, pod := range podList2.Items {
h := sha1.New()
h.Write([]byte(fmt.Sprintf("%s.%s", pod.Namespace, pod.Name)))
peerName := fmt.Sprintf("%s%s", "veth", hex.EncodeToString(h.Sum(nil))[:11])
execSafeAt(pod.Status.HostIP, "ip", "link", "show", peerName)
}
By("checking use same veth name when container crashed")
podName := podList2.Items[0].Name
_, stderr, err = kubectl("exec", podName, "--", "/bin/bash", "-c", "'kill 1'")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
Eventually(func() error {
stdout, stderr, err := kubectl("get", "pods", podName, "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
pod := new(corev1.Pod)
err = json.Unmarshal(stdout, pod)
if err != nil {
return err
}
if !pod.Status.ContainerStatuses[0].Ready {
return errors.New("pod is not ready yet")
}
h := sha1.New()
h.Write([]byte(fmt.Sprintf("%s.%s", pod.Namespace, pod.Name)))
peerName := fmt.Sprintf("%s%s", "veth", hex.EncodeToString(h.Sum(nil))[:11])
_, stderr, err = execAt(pod.Status.HostIP, "ip", "link", "show", peerName)
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
return nil
}).Should(Succeed())
})
It("should expose all blocks", func() {
addressPool := "10.0.6.0/24"
By("creating address pool")
coilctlSafe("pool", "create", "default", addressPool, "1")
coilctlSafe("pool", "show", "--json", "default", addressPool)
By("creating 4 pods to node1")
overrides := fmt.Sprintf(`{ "apiVersion": "apps/v1", "spec": { "template": { "spec": { "nodeSelector": { "kubernetes.io/hostname": "%s" } } } } }`, node1)
overrideFile := remoteTempFile(overrides)
_, stderr, err := kubectl("run", "nginx", "--image=nginx", "--replicas=4", "--overrides=\"$(cat "+overrideFile+")\"")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
Eventually(func() error {
stdout, stderr, err := kubectl("get", "pods", "--selector=run=nginx", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
podList := new(corev1.PodList)
err = json.Unmarshal(stdout, podList)
if err != nil {
return err
}
if len(podList.Items) != 4 {
return errors.New("Four pods are not created")
}
for _, pod := range podList.Items {
if pod.Status.Phase != corev1.PodRunning {
return errors.New("All pods are note running")
}
}
return nil
}).Should(Succeed())
stdout, stderr, err := execAt(node1, "ip", "route", "show", "table", "119", "10.0.6.0/31")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
Expect(stdout).NotTo(BeEmpty())
stdout, stderr, err = execAt(node1, "ip", "route", "show", "table", "119", "10.0.6.2/31")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
Expect(err).NotTo(HaveOccurred())
Expect(stdout).NotTo(BeEmpty())
})
It("should access pod in different node", func() {
addressPool := "10.0.6.0/24"
By("creating address pool")
coilctlSafe("pool", "create", "default", addressPool, "2")
coilctlSafe("pool", "show", "--json", "default", addressPool)
By("deployment nginx Pod")
overrides := fmt.Sprintf(`{ "apiVersion": "v1", "spec": { "nodeSelector": { "kubernetes.io/hostname": "%s" } } }`, node1)
overrideFile := remoteTempFile(overrides)
_, stderr, err := kubectl("run", "--generator=run-pod/v1", "nginx", "--image=nginx", "--overrides=\"$(cat "+overrideFile+")\"", "--restart=Never")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
By("waiting pods are ready")
Eventually(func() error {
stdout, stderr, err := kubectl("get", "pods/nginx", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
pod := new(corev1.Pod)
err = json.Unmarshal(stdout, pod)
if err != nil {
return err
}
if pod.Status.Phase != corev1.PodRunning {
return fmt.Errorf("pod is not Running: %v", pod)
}
if len(pod.Status.PodIP) == 0 {
return errors.New("pod is not assigned IP")
}
return nil
}).Should(Succeed())
pod := new(corev1.Pod)
stdout, stderr, err := kubectl("get", "pods/nginx", "-o=json")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
err = json.Unmarshal(stdout, pod)
Expect(err).NotTo(HaveOccurred())
nginxPodIP := pod.Status.PodIP
By("executing curl to nginx Pod from ubuntu-debug Pod in different node")
overrides = fmt.Sprintf(`{ "apiVersion": "v1", "spec": { "nodeSelector": { "kubernetes.io/hostname": "%s" } } }`, node2)
overrideFile = remoteTempFile(overrides)
_, stderr, err = kubectl("run", "--generator=run-pod/v1", "-it", "ubuntu-debug", "--image=quay.io/cybozu/ubuntu-debug:18.04",
"--overrides=\"$(cat "+overrideFile+")\"", "--restart=Never",
"--command", "--", "curl", "http://"+nginxPodIP)
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
})
It("should assign PodIP using address pool whose name matches the specified namespace", func() {
defaultAddressPool := "10.0.1.0/24"
addressPool := "10.0.3.0/24"
By("creating address pool")
coilctlSafe("pool", "create", "default", defaultAddressPool, "2")
coilctlSafe("pool", "create", "dmz", addressPool, "2")
By("deployment Pods in dmz namespace")
_, stderr, err := kubectl("run", "nginx", "--replicas=2", "--image=nginx", "--namespace=dmz")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
By("waiting pods are ready")
Eventually(func() error {
stdout, stderr, err := kubectl("get", "deployments/nginx", "--namespace=dmz", "-o=json")
if err != nil {
return fmt.Errorf("%v: stderr=%s", err, stderr)
}
deployment := new(appsv1.Deployment)
err = json.Unmarshal(stdout, deployment)
if err != nil {
return err
}
if deployment.Status.ReadyReplicas != 2 {
return errors.New("ReadyReplicas is not 2")
}
return nil
}).Should(Succeed())
By("checking PodIPs are assigned")
stdout, stderr, err := kubectl("get", "pods", "--selector=run=nginx", "--namespace=dmz", "-o=json")
Expect(err).NotTo(HaveOccurred(), "stderr: %s", stderr)
podList := new(corev1.PodList)
err = json.Unmarshal(stdout, podList)
Expect(err).NotTo(HaveOccurred())
_, subnet, err := net.ParseCIDR(addressPool)
Expect(err).NotTo(HaveOccurred())
for _, pod := range podList.Items {
By("checking PodIP is in address pool")
ip := net.ParseIP(pod.Status.PodIP)
Expect(subnet.Contains(ip)).To(BeTrue(), "subnet: %s, ip: %s", subnet, ip)
}
})
}