add killall as a subcommand

Signed-off-by: Ian Cardoso <osodracnai@gmail.com>

cmd/k3s/main.go

@@ -52,6 +52,7 @@ func main() {
 		cmds.NewCRICTL(externalCLIAction("crictl", dataDir)),
 		cmds.NewCtrCommand(externalCLIAction("ctr", dataDir)),
 		cmds.NewCheckConfigCommand(externalCLIAction("check-config", dataDir)),
+		cmds.NewKillAllCommand(externalCLIAction("test", dataDir)),
 		cmds.NewTokenCommands(
 			tokenCommand,
 			tokenCommand,

contrib/util/k3s-killall.sh

@@ -0,0 +1,90 @@
+#!/bin/sh
+[ $(id -u) -eq 0 ] || exec sudo $0 $@
+
+for bin in /var/lib/rancher/k3s/data/**/bin/; do
+    [ -d $bin ] && export PATH=$PATH:$bin:$bin/aux
+done
+
+set -x
+
+for service in /etc/systemd/system/k3s*.service; do
+    [ -s $service ] && systemctl stop $(basename $service)
+done
+
+for service in /etc/init.d/k3s*; do
+    [ -x $service ] && $service stop
+done
+
+pschildren() {
+    ps -e -o ppid= -o pid= | \
+    sed -e 's/^\s*//g; s/\s\s*/\t/g;' | \
+    grep -w "^$1" | \
+    cut -f2
+}
+
+pstree() {
+    for pid in $@; do
+        echo $pid
+        for child in $(pschildren $pid); do
+            pstree $child
+        done
+    done
+}
+
+killtree() {
+    kill -9 $(
+        { set +x; } 2>/dev/null;
+        pstree $@;
+        set -x;
+    ) 2>/dev/null
+}
+
+remove_interfaces() {
+    # Delete network interface(s) that match 'master cni0'
+    ip link show 2>/dev/null | grep 'master cni0' | while read ignore iface ignore; do
+        iface=${iface%%@*}
+        [ -z "$iface" ] || ip link delete $iface
+    done
+
+    # Delete cni related interfaces
+    ip link delete cni0
+    ip link delete flannel.1
+    ip link delete flannel-v6.1
+    ip link delete kube-ipvs0
+    ip link delete flannel-wg
+    ip link delete flannel-wg-v6
+
+    # Restart tailscale
+    if [ -n "$(command -v tailscale)" ]; then
+        tailscale set --advertise-routes=
+    fi
+}
+
+getshims() {
+    ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'k3s/data/[^/]*/bin/containerd-shim' | cut -f1
+}
+
+killtree $({ set +x; } 2>/dev/null; getshims; set -x)
+
+do_unmount_and_remove() {
+    set +x
+    while read -r _ path _; do
+        case "$path" in $1*) echo "$path" ;; esac
+    done < /proc/self/mounts | sort -r | xargs -r -t -n 1 sh -c 'umount "$0" && rm -rf "$0"'
+    set -x
+}
+
+do_unmount_and_remove '/run/k3s'
+do_unmount_and_remove '/var/lib/rancher/k3s'
+do_unmount_and_remove '/var/lib/kubelet/pods'
+do_unmount_and_remove '/var/lib/kubelet/plugins'
+do_unmount_and_remove '/run/netns/cni-'
+
+# Remove CNI namespaces
+ip netns show 2>/dev/null | grep cni- | xargs -r -t -n 1 ip netns delete
+
+remove_interfaces
+
+rm -rf /var/lib/cni/
+iptables-save | grep -v KUBE- | grep -v CNI- | grep -iv flannel | iptables-restore
+ip6tables-save | grep -v KUBE- | grep -v CNI- | grep -iv flannel | ip6tables-restore

pkg/cli/cmds/killall.go

@@ -0,0 +1,13 @@
+package cmds
+
+import "github.com/urfave/cli"
+
+func NewKillAllCommand(action func(*cli.Context) error) cli.Command {
+	return cli.Command{
+		Name:            "k3s-killall",
+		Usage:           "Run k3s-killall.sh script",
+		SkipFlagParsing: true,
+		SkipArgReorder:  true,
+		Action:          action,
+	}
+}

scripts/package-cli

@@ -18,6 +18,7 @@ for i in bandwidth bridge firewall flannel host-local loopback portmap; do
 done
 
 cp contrib/util/check-config.sh bin/check-config
+cp contrib/util/k3s-killall.sh bin/test
 
 rm -rf build/data
 mkdir -p build/data build/out

tests/e2e/killall/Vagrantfile

@@ -0,0 +1,82 @@
+ENV['VAGRANT_NO_PARALLEL'] = 'no'
+NODE_ROLES = (ENV['E2E_NODE_ROLES'] ||
+  ["server-0", "agent-0", "agent-1" ])
+NODE_BOXES = (ENV['E2E_NODE_BOXES'] ||
+  ['generic/ubuntu2004', 'generic/ubuntu2004', 'generic/ubuntu2004'])
+GITHUB_BRANCH = (ENV['E2E_GITHUB_BRANCH'] || "master")
+RELEASE_VERSION = (ENV['E2E_RELEASE_VERSION'] || "")
+GOCOVER = (ENV['E2E_GOCOVER'] || "")
+NODE_CPUS = (ENV['E2E_NODE_CPUS'] || 2).to_i
+NODE_MEMORY = (ENV['E2E_NODE_MEMORY'] || 2048).to_i
+# This key must be created using tailscale web
+NETWORK_PREFIX = "10.10.10"
+install_type = ""
+
+def provision(vm, roles, role_num, node_num)
+  vm.box = NODE_BOXES[node_num]
+  vm.hostname = "#{roles[0]}-#{role_num}"
+  node_ip = "#{NETWORK_PREFIX}.#{100+node_num}"
+  vm.network "private_network", ip: node_ip, netmask: "255.255.255.0"
+
+  scripts_location = Dir.exists?("./scripts") ? "./scripts" : "../scripts"
+  vagrant_defaults = File.exists?("./vagrantdefaults.rb") ? "./vagrantdefaults.rb" : "../vagrantdefaults.rb"
+  load vagrant_defaults
+
+  defaultOSConfigure(vm)
+  addCoverageDir(vm, roles, GOCOVER)
+  install_type = getInstallType(vm, RELEASE_VERSION, GITHUB_BRANCH)
+
+  vm.provision "Ping Check", type: "shell", inline: "ping -c 2 k3s.io"
+
+  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
+        cluster-init: true
+        token: vagrant
+        node-external-ip: #{node_ip}
+        flannel-iface: eth1
+      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
+        server: "https://#{NETWORK_PREFIX}.100:6443"
+        node-external-ip: #{node_ip}
+        flannel-iface: eth1
+      YAML
+      k3s.env = ["K3S_KUBECONFIG_MODE=0644",  "INSTALL_K3S_SKIP_START=true", install_type]
+    end
+  end
+end
+
+Vagrant.configure("2") do |config|
+  config.vagrant.plugins = ["vagrant-k3s", "vagrant-reload", "vagrant-libvirt", "vagrant-scp"]
+  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

tests/e2e/killall/killall_test.go

@@ -0,0 +1,121 @@
+package killall
+
+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, generic/centos7, generic/rocky8,
+// opensuse/Leap-15.3.x86_64
+var nodeOS = flag.String("nodeOS", "generic/ubuntu2004", "VM operating system")
+var ci = flag.Bool("ci", false, "running on CI")
+var local = flag.Bool("local", false, "deploy a locally built K3s binary")
+
+// Environment Variables Info:
+// E2E_RELEASE_VERSION=v1.23.1+k3s2 (default: latest commit from master)
+// E2E_REGISTRY: true/false (default: false)
+
+func Test_E2EKillAll(t *testing.T) {
+	RegisterFailHandler(Fail)
+	flag.Parse()
+	suiteConfig, reporterConfig := GinkgoConfiguration()
+	RunSpecs(t, "Create Cluster Test Suite", suiteConfig, reporterConfig)
+}
+
+var (
+	kubeConfigFile  string
+	serverNodeNames []string
+	agentNodeNames  []string
+)
+
+var _ = ReportAfterEach(e2e.GenReport)
+
+var _ = Describe("Verify Create", Ordered, func() {
+	Context("Cluster :", func() {
+		It("Starts up with no issues", func() {
+			var err error
+			if *local {
+				serverNodeNames, agentNodeNames, err = e2e.CreateLocalCluster(*nodeOS, 1, 0)
+			} else {
+				serverNodeNames, agentNodeNames, err = e2e.CreateCluster(*nodeOS, 1, 0)
+			}
+			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 and Pod Status", func() {
+			fmt.Printf("\nFetching node status\n")
+			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"))
+				}
+			}, "620s", "5s").Should(Succeed())
+			_, _ = e2e.ParseNodes(kubeConfigFile, true)
+
+			fmt.Printf("\nFetching Pods status\n")
+			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)
+					}
+				}
+			}, "620s", "5s").Should(Succeed())
+			_, _ = e2e.ParsePods(kubeConfigFile, true)
+		})
+		It("Tries to kill k3s processes", func() {
+			cmd := "k3s k3s-killall"
+			out, err := e2e.RunCmdOnNode(cmd, serverNodeNames[0])
+			if err != nil {
+				fmt.Println(err.Error())
+				Expect(err).ToNot(HaveOccurred())
+			}
+			fmt.Println(out)
+			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)
+					}
+				}
+			}, "620s", "5s").Should(Succeed())
+			_, _ = e2e.ParsePods(kubeConfigFile, true)
+		})
+	})
+
+})
+var failed bool
+var _ = AfterEach(func() {
+	failed = failed || CurrentSpecReport().Failed()
+})
+
+var _ = AfterSuite(func() {
+
+	if failed && !*ci {
+		fmt.Println("FAILED!")
+	} else {
+		Expect(e2e.GetCoverageReport(append(serverNodeNames, agentNodeNames...))).To(Succeed())
+		Expect(e2e.DestroyCluster()).To(Succeed())
+		Expect(os.Remove(kubeConfigFile)).To(Succeed())
+	}
+})