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Add test for node-external-ip config parameter

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Signed-off-by: Manuel Buil <mbuil@suse.com>
This commit is contained in:
Manuel Buil 2022-10-19 15:06:32 +02:00
parent 1f96f27cdf
commit abaa6c9023
4 changed files with 312 additions and 52 deletions
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64
tests/e2e/dualstack/dualstack_test.go
View File

@ -18,46 +18,6 @@ var serverCount = flag.Int("serverCount", 1, "number of server nodes")
var agentCount = flag.Int("agentCount", 1, "number of agent nodes")
var hardened = flag.Bool("hardened", false, "true or false")
// Environment Variables Info:
// E2E_RELEASE_VERSION=v1.23.1+k3s1 or nil for latest commit from master
type objIP struct {
name string
ipv4 string
ipv6 string
}
func getPodIPs(kubeConfigFile string) ([]objIP, error) {
cmd := `kubectl get pods -A -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.podIPs[*].ip}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return getObjIPs(cmd)
}
func getNodeIPs(kubeConfigFile string) ([]objIP, error) {
cmd := `kubectl get nodes -o jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.addresses[?(@.type == "InternalIP")].address}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return getObjIPs(cmd)
}
func getObjIPs(cmd string) ([]objIP, error) {
var objIPs []objIP
res, err := e2e.RunCommand(cmd)
if err != nil {
return nil, err
}
objs := strings.Split(res, "\n")
objs = objs[:len(objs)-1]
for _, obj := range objs {
fields := strings.Fields(obj)
if len(fields) > 2 {
objIPs = append(objIPs, objIP{name: fields[0], ipv4: fields[1], ipv6: fields[2]})
} else if len(fields) > 1 {
objIPs = append(objIPs, objIP{name: fields[0], ipv4: fields[1]})
} else {
objIPs = append(objIPs, objIP{name: fields[0]})
}
}
return objIPs, nil
}
func Test_E2EDualStack(t *testing.T) {
flag.Parse()
RegisterFailHandler(Fail)
@ -113,19 +73,19 @@ var _ = Describe("Verify DualStack Configuration", Ordered, func() {
})
It("Verifies that each node has IPv4 and IPv6", func() {
nodeIPs, err := getNodeIPs(kubeConfigFile)
nodeIPs, err := e2e.GetNodeIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, node := range nodeIPs {
Expect(node.ipv4).Should(ContainSubstring("10.10.10"))
Expect(node.ipv6).Should(ContainSubstring("fd11:decf:c0ff"))
Expect(node.IPv4).Should(ContainSubstring("10.10.10"))
Expect(node.IPv6).Should(ContainSubstring("fd11:decf:c0ff"))
}
})
It("Verifies that each pod has IPv4 and IPv6", func() {
podIPs, err := getPodIPs(kubeConfigFile)
podIPs, err := e2e.GetPodIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, pod := range podIPs {
Expect(pod.ipv4).Should(Or(ContainSubstring("10.10.10"), ContainSubstring("10.42.")), pod.name)
Expect(pod.ipv6).Should(Or(ContainSubstring("fd11:decf:c0ff"), ContainSubstring("2001:cafe:42")), pod.name)
Expect(pod.IPv4).Should(Or(ContainSubstring("10.10.10"), ContainSubstring("10.42.")), pod.Name)
Expect(pod.IPv6).Should(Or(ContainSubstring("fd11:decf:c0ff"), ContainSubstring("2001:cafe:42")), pod.Name)
}
})
@ -163,14 +123,14 @@ var _ = Describe("Verify DualStack Configuration", Ordered, func() {
cmd := "kubectl get ingress ds-ingress --kubeconfig=" + kubeConfigFile + " -o jsonpath=\"{.spec.rules[*].host}\""
hostName, err := e2e.RunCommand(cmd)
Expect(err).NotTo(HaveOccurred(), "failed cmd: "+cmd)
nodeIPs, err := getNodeIPs(kubeConfigFile)
nodeIPs, err := e2e.GetNodeIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred(), "failed cmd: "+cmd)
for _, node := range nodeIPs {
cmd := fmt.Sprintf("curl --header host:%s http://%s/name.html", hostName, node.ipv4)
cmd := fmt.Sprintf("curl --header host:%s http://%s/name.html", hostName, node.IPv4)
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "10s", "2s").Should(ContainSubstring("ds-clusterip-pod"), "failed cmd: "+cmd)
cmd = fmt.Sprintf("curl --header host:%s http://[%s]/name.html", hostName, node.ipv6)
cmd = fmt.Sprintf("curl --header host:%s http://[%s]/name.html", hostName, node.IPv6)
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "5s", "1s").Should(ContainSubstring("ds-clusterip-pod"), "failed cmd: "+cmd)
@ -183,14 +143,14 @@ var _ = Describe("Verify DualStack Configuration", Ordered, func() {
cmd := "kubectl get service ds-nodeport-svc --kubeconfig=" + kubeConfigFile + " --output jsonpath=\"{.spec.ports[0].nodePort}\""
nodeport, err := e2e.RunCommand(cmd)
Expect(err).NotTo(HaveOccurred(), "failed cmd: "+cmd)
nodeIPs, err := getNodeIPs(kubeConfigFile)
nodeIPs, err := e2e.GetNodeIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, node := range nodeIPs {
cmd = "curl -L --insecure http://" + node.ipv4 + ":" + nodeport + "/name.html"
cmd = "curl -L --insecure http://" + node.IPv4 + ":" + nodeport + "/name.html"
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "10s", "1s").Should(ContainSubstring("ds-nodeport-pod"), "failed cmd: "+cmd)
cmd = "curl -L --insecure http://[" + node.ipv6 + "]:" + nodeport + "/name.html"
cmd = "curl -L --insecure http://[" + node.IPv6 + "]:" + nodeport + "/name.html"
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "10s", "1s").Should(ContainSubstring("ds-nodeport-pod"), "failed cmd: "+cmd)

94
tests/e2e/externalip/Vagrantfile vendored Normal file
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@ -0,0 +1,94 @@
ENV['VAGRANT_NO_PARALLEL'] = 'no'
NODE_ROLES = (ENV['E2E_NODE_ROLES'] ||
["server-0", "agent-0" ])
NODE_BOXES = (ENV['E2E_NODE_BOXES'] ||
['generic/ubuntu2004', 'generic/ubuntu2004'])
GITHUB_BRANCH = (ENV['E2E_GITHUB_BRANCH'] || "master")
RELEASE_VERSION = (ENV['E2E_RELEASE_VERSION'] || "")
NODE_CPUS = (ENV['E2E_NODE_CPUS'] || 2).to_i
NODE_MEMORY = (ENV['E2E_NODE_MEMORY'] || 2048).to_i
NETWORK4_PREFIX = "10.10.10"
PUBLIC_NETWORK4_PREFIX = "10.100.100"
install_type = ""
def provision(vm, roles, role_num, node_num)
vm.box = NODE_BOXES[node_num]
vm.hostname = "#{roles[0]}-#{role_num}"
node_ip4 = "#{NETWORK4_PREFIX}.#{100+node_num}"
node_ip4_public = "#{PUBLIC_NETWORK4_PREFIX}.#{100+node_num}"
vm.network "private_network",
:ip => node_ip4,
:netmask => "255.255.255.0",
:libvirt__dhcp_enabled => false,
:libvirt__forward_mode => "none"
vm.network "private_network",
:ip => node_ip4_public,
:netmask => "255.255.255.0",
:libvirt__dhcp_enabled => false,
:libvirt__forward_mode => "none"
scripts_location = Dir.exists?("./scripts") ? "./scripts" : "../scripts"
vagrant_defaults = File.exists?("./vagrantdefaults.rb") ? "./vagrantdefaults.rb" : "../vagrantdefaults.rb"
load vagrant_defaults
defaultOSConfigure(vm)
install_type = getInstallType(vm, RELEASE_VERSION, GITHUB_BRANCH)
if roles.include?("server") && role_num == 0
vm.provision :k3s, run: 'once' do |k3s|
k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
k3s.args = "server "
k3s.config = <<~YAML
node-external-ip: #{node_ip4_public}
node-ip: #{node_ip4}
token: vagrant
flannel-backend: wireguard-native
flannel-external-ip: true
YAML
k3s.env = ["K3S_KUBECONFIG_MODE=0644", install_type]
end
end
if roles.include?("agent")
vm.provision :k3s, run: 'once' do |k3s|
k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321
k3s.args = "agent "
k3s.config = <<~YAML
node-external-ip: #{node_ip4_public}
server: https://#{PUBLIC_NETWORK4_PREFIX}.100:6443
token: vagrant
node-ip: #{node_ip4}
flannel-iface: eth1
YAML
k3s.env = ["K3S_KUBECONFIG_MODE=0644", install_type]
end
end
# Make sure cluster traffic cannot flow via eth1
vm.provision "Disable forwarding", type: "shell", inline: "sysctl -w net.ipv4.conf.eth1.forwarding=0"
end
Vagrant.configure("2") do |config|
config.vagrant.plugins = ["vagrant-k3s", "vagrant-reload", "vagrant-libvirt"]
config.vm.provider "libvirt" do |v|
v.cpus = NODE_CPUS
v.memory = NODE_MEMORY
end
if NODE_ROLES.kind_of?(String)
NODE_ROLES = NODE_ROLES.split(" ", -1)
end
if NODE_BOXES.kind_of?(String)
NODE_BOXES = NODE_BOXES.split(" ", -1)
end
# Must iterate on the index, vagrant does not understand iterating
# over the node roles themselves
NODE_ROLES.length.times do |i|
name = NODE_ROLES[i]
config.vm.define name do |node|
roles = name.split("-", -1)
role_num = roles.pop.to_i
provision(node.vm, roles, role_num, i)
end
end
end

164
tests/e2e/externalip/external_test.go Normal file
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@ -0,0 +1,164 @@
// This test verifies that two nodes, which can't connect using the local network, are
// able to still connect using the node-external-ip. In real life, node-external-ip
// would be a public IP. In the test, we create two networks, one sets the node
// internal-ip and the other sets the node-external-ip. Traffic is blocked on the former
package externalip
import (
"flag"
"fmt"
"os"
"strings"
"testing"
"github.com/k3s-io/k3s/tests/e2e"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
// Valid nodeOS: generic/ubuntu2004, opensuse/Leap-15.3.x86_64
var nodeOS = flag.String("nodeOS", "generic/ubuntu2004", "VM operating system")
var serverCount = flag.Int("serverCount", 1, "number of server nodes")
var agentCount = flag.Int("agentCount", 1, "number of agent nodes")
var hardened = flag.Bool("hardened", false, "true or false")
// getLBServiceIPs returns the externalIP configured for flannel
func getExternalIPs(kubeConfigFile string) ([]string, error) {
cmd := `kubectl get nodes -o jsonpath='{range .items[*]}{.metadata.annotations.flannel\.alpha\.coreos\.com/public-ip-overwrite}' --kubeconfig=` + kubeConfigFile
res, err := e2e.RunCommand(cmd)
if err != nil {
return nil, err
}
return strings.Split(res, " "), nil
}
// getLBServiceIPs returns the LoadBalance service IPs
func getLBServiceIPs(kubeConfigFile string) ([]e2e.ObjIP, error) {
cmd := `kubectl get svc -l k8s-app=nginx-app-loadbalancer -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.loadBalancer.ingress[*].ip}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return e2e.GetObjIPs(cmd)
}
// getClientIPs returns the IPs of the client pods
func getClientIPs(kubeConfigFile string) ([]e2e.ObjIP, error) {
cmd := `kubectl get pods -l app=client -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.podIPs[*].ip}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return e2e.GetObjIPs(cmd)
}
func Test_E2EExternalIP(t *testing.T) {
flag.Parse()
RegisterFailHandler(Fail)
RunSpecs(t, "Validate External-IP config Suite")
}
var (
kubeConfigFile string
serverNodeNames []string
agentNodeNames []string
)
var _ = Describe("Verify External-IP config", Ordered, func() {
It("Starts up with no issues", func() {
var err error
serverNodeNames, agentNodeNames, err = e2e.CreateCluster(*nodeOS, *serverCount, *agentCount)
Expect(err).NotTo(HaveOccurred(), e2e.GetVagrantLog(err))
fmt.Println("CLUSTER CONFIG")
fmt.Println("OS:", *nodeOS)
fmt.Println("Server Nodes:", serverNodeNames)
fmt.Println("Agent Nodes:", agentNodeNames)
kubeConfigFile, err = e2e.GenKubeConfigFile(serverNodeNames[0])
Expect(err).NotTo(HaveOccurred())
})
It("Checks Node Status", func() {
Eventually(func(g Gomega) {
nodes, err := e2e.ParseNodes(kubeConfigFile, false)
g.Expect(err).NotTo(HaveOccurred())
for _, node := range nodes {
g.Expect(node.Status).Should(Equal("Ready"))
}
}, "420s", "5s").Should(Succeed())
_, err := e2e.ParseNodes(kubeConfigFile, true)
Expect(err).NotTo(HaveOccurred())
})
It("Checks Pod Status", func() {
Eventually(func(g Gomega) {
pods, err := e2e.ParsePods(kubeConfigFile, false)
g.Expect(err).NotTo(HaveOccurred())
for _, pod := range pods {
if strings.Contains(pod.Name, "helm-install") {
g.Expect(pod.Status).Should(Equal("Completed"), pod.Name)
} else {
g.Expect(pod.Status).Should(Equal("Running"), pod.Name)
}
}
}, "420s", "5s").Should(Succeed())
_, err := e2e.ParsePods(kubeConfigFile, true)
Expect(err).NotTo(HaveOccurred())
})
It("Verifies that each node has vagrant IP", func() {
nodeIPs, err := e2e.GetNodeIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, node := range nodeIPs {
Expect(node.IPv4).Should(ContainSubstring("10.10."))
}
})
It("Verifies that each pod has vagrant IP or clusterCIDR IP", func() {
podIPs, err := e2e.GetPodIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, pod := range podIPs {
Expect(pod.IPv4).Should(Or(ContainSubstring("10.10."), ContainSubstring("10.42.")), pod.Name)
}
})
It("Verifies that flannel added the correct annotation for the external-ip", func() {
nodeIPs, err := getExternalIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, annotation := range nodeIPs {
Expect(annotation).Should(ContainSubstring("10.100.100."))
}
})
It("Verifies internode connectivity over the tunnel", func() {
_, err := e2e.DeployWorkload("pod_client.yaml", kubeConfigFile, *hardened)
Expect(err).NotTo(HaveOccurred())
// Wait for the pod_client to have an IP
Eventually(func() string {
ips, _ := getClientIPs(kubeConfigFile)
return ips[0].IPv4
}, "40s", "5s").Should(ContainSubstring("10.42"), "failed getClientIPs")
clientIPs, err := getClientIPs(kubeConfigFile)
Expect(err).NotTo(HaveOccurred())
for _, ip := range clientIPs {
cmd := "kubectl exec svc/client-curl --kubeconfig=" + kubeConfigFile + " -- curl -m7 " + ip.IPv4 + "/name.html"
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "20s", "3s").Should(ContainSubstring("client-deployment"), "failed cmd: "+cmd)
}
})
It("Verifies loadBalancer service's IP is the node-external-ip", func() {
_, err := e2e.DeployWorkload("loadbalancer.yaml", kubeConfigFile, *hardened)
Expect(err).NotTo(HaveOccurred())
cmd := "kubectl --kubeconfig=" + kubeConfigFile + " get svc -l k8s-app=nginx-app-loadbalancer -o=jsonpath='{range .items[*]}{.metadata.name}{.status.loadBalancer.ingress[*].ip}{end}'"
Eventually(func() (string, error) {
return e2e.RunCommand(cmd)
}, "20s", "3s").Should(ContainSubstring("10.100.100"), "failed cmd: "+cmd)
})
})
var failed bool
var _ = AfterEach(func() {
failed = failed || CurrentSpecReport().Failed()
})
var _ = AfterSuite(func() {
if failed {
fmt.Println("FAILED!")
} else {
Expect(e2e.DestroyCluster()).To(Succeed())
Expect(os.Remove(kubeConfigFile)).To(Succeed())
}
})

42
tests/e2e/testutils.go
View File

@ -39,6 +39,12 @@ type NodeError struct {
Err error
}
type ObjIP struct {
Name string
IPv4 string
IPv6 string
}
func (ne *NodeError) Error() string {
return fmt.Sprintf("failed creating cluster: %s: %v", ne.Cmd, ne.Err)
}
@ -403,3 +409,39 @@ func UpgradeCluster(serverNodeNames []string, agentNodeNames []string) error {
}
return nil
}
// getPodIPs returns the IPs of all pods
func GetPodIPs(kubeConfigFile string) ([]ObjIP, error) {
cmd := `kubectl get pods -A -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.podIPs[*].ip}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return GetObjIPs(cmd)
}
// getNodeIPs returns the IPs of all nodes
func GetNodeIPs(kubeConfigFile string) ([]ObjIP, error) {
cmd := `kubectl get nodes -o jsonpath='{range .items[*]}{.metadata.name}{" "}{.status.addresses[?(@.type == "InternalIP")].address}{"\n"}{end}' --kubeconfig=` + kubeConfigFile
return GetObjIPs(cmd)
}
// getObjIPs executes a command to collect IPs
func GetObjIPs(cmd string) ([]ObjIP, error) {
var objIPs []ObjIP
res, err := RunCommand(cmd)
if err != nil {
return nil, err
}
objs := strings.Split(res, "\n")
objs = objs[:len(objs)-1]
for _, obj := range objs {
fields := strings.Fields(obj)
if len(fields) > 2 {
objIPs = append(objIPs, ObjIP{Name: fields[0], IPv4: fields[1], IPv6: fields[2]})
} else if len(fields) > 1 {
objIPs = append(objIPs, ObjIP{Name: fields[0], IPv4: fields[1]})
} else {
objIPs = append(objIPs, ObjIP{Name: fields[0]})
}
}
return objIPs, nil
}