CAPD: only ignore necessary kubeadm preflight errors

Signed-off-by: Stefan Büringer [email protected]

Author: sbueringer

test/infrastructure/docker/internal/provisioning/cloudinit/runcmd.go

@@ -17,6 +17,7 @@ limitations under the License.
 package cloudinit
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/pkg/errors"
@@ -53,21 +54,27 @@ func (a *runCmd) Commands() ([]provisioning.Cmd, error) {
 	return cmds, nil
 }
 
+// ignorePreflightErrors are preflight errors that fail in CAPD and thus we have to ignore them.
+const ignorePreflightErrors = "SystemVerification,Swap,FileContent--proc-sys-net-bridge-bridge-nf-call-iptables"
+
 func hackKubeadmIgnoreErrors(c provisioning.Cmd) provisioning.Cmd {
 	// case kubeadm commands are defined as a string
 	if c.Cmd == "/bin/sh" && len(c.Args) >= 2 {
 		if c.Args[0] == "-c" {
-			c.Args[1] = strings.Replace(c.Args[1], "kubeadm init", "kubeadm init --ignore-preflight-errors=all", 1)
-			c.Args[1] = strings.Replace(c.Args[1], "kubeadm join", "kubeadm join --ignore-preflight-errors=all", 1)
+			c.Args[1] = strings.Replace(c.Args[1], "kubeadm init", fmt.Sprintf("kubeadm init --ignore-preflight-errors=%s", ignorePreflightErrors), 1)
+			c.Args[1] = strings.Replace(c.Args[1], "kubeadm join", fmt.Sprintf("kubeadm join --ignore-preflight-errors=%s", ignorePreflightErrors), 1)
 		}
 	}
 
 	// case kubeadm commands are defined as a list
 	if c.Cmd == "kubeadm" && len(c.Args) >= 1 {
 		if c.Args[0] == "init" || c.Args[0] == "join" {
-			c.Args = append(c.Args, "")                 // make space
-			copy(c.Args[2:], c.Args[1:])                // shift elements
-			c.Args[1] = "--ignore-preflight-errors=all" // insert the additional arg
+			// make space
+			c.Args = append(c.Args, "")
+			// shift elements
+			copy(c.Args[2:], c.Args[1:])
+			// insert the additional arg
+			c.Args[1] = fmt.Sprintf("--ignore-preflight-errors=%s", ignorePreflightErrors)
 		}
 	}
 

test/infrastructure/docker/internal/provisioning/cloudinit/runcmd_test.go

@@ -70,7 +70,7 @@ func TestRunCmdRun(t *testing.T) {
 				},
 			},
 			expectedCmds: []provisioning.Cmd{
-				{Cmd: "/bin/sh", Args: []string{"-c", "kubeadm init --ignore-preflight-errors=all --config /run/kubeadm/kubeadm.yaml"}},
+				{Cmd: "/bin/sh", Args: []string{"-c", "kubeadm init --ignore-preflight-errors=SystemVerification,Swap,FileContent--proc-sys-net-bridge-bridge-nf-call-iptables --config /run/kubeadm/kubeadm.yaml"}},
 			},
 		},
 	}
@@ -100,11 +100,11 @@ runcmd:
 
 	r.Cmds[0] = hackKubeadmIgnoreErrors(r.Cmds[0])
 
-	expected0 := provisioning.Cmd{Cmd: "/bin/sh", Args: []string{"-c", "kubeadm init --ignore-preflight-errors=all --config=/run/kubeadm/kubeadm.yaml"}}
+	expected0 := provisioning.Cmd{Cmd: "/bin/sh", Args: []string{"-c", "kubeadm init --ignore-preflight-errors=SystemVerification,Swap,FileContent--proc-sys-net-bridge-bridge-nf-call-iptables --config=/run/kubeadm/kubeadm.yaml"}}
 	g.Expect(r.Cmds[0]).To(Equal(expected0))
 
 	r.Cmds[1] = hackKubeadmIgnoreErrors(r.Cmds[1])
 
-	expected1 := provisioning.Cmd{Cmd: "kubeadm", Args: []string{"join", "--ignore-preflight-errors=all", "--config=/run/kubeadm/kubeadm-controlplane-join-config.yaml"}}
+	expected1 := provisioning.Cmd{Cmd: "kubeadm", Args: []string{"join", "--ignore-preflight-errors=SystemVerification,Swap,FileContent--proc-sys-net-bridge-bridge-nf-call-iptables", "--config=/run/kubeadm/kubeadm-controlplane-join-config.yaml"}}
 	g.Expect(r.Cmds[1]).To(Equal(expected1))
 }