mirror of https://github.com/k3s-io/k3s
103 lines
3.4 KiB
Go
103 lines
3.4 KiB
Go
// +build linux
|
|
|
|
/*
|
|
Copyright 2018 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License 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 ipvs
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
utilsexec "k8s.io/utils/exec"
|
|
|
|
"github.com/lithammer/dedent"
|
|
"k8s.io/klog"
|
|
)
|
|
|
|
// RequiredIPVSKernelModulesAvailableCheck tests IPVS required kernel modules.
|
|
type RequiredIPVSKernelModulesAvailableCheck struct {
|
|
Executor utilsexec.Interface
|
|
}
|
|
|
|
// Name returns label for RequiredIPVSKernelModulesAvailableCheck
|
|
func (r RequiredIPVSKernelModulesAvailableCheck) Name() string {
|
|
return "RequiredIPVSKernelModulesAvailable"
|
|
}
|
|
|
|
// Check try to validates IPVS required kernel modules exists or not.
|
|
// The name of function can not be changed.
|
|
func (r RequiredIPVSKernelModulesAvailableCheck) Check() (warnings, errors []error) {
|
|
klog.V(1).Infoln("validating the kernel module IPVS required exists in machine or not")
|
|
|
|
kernelVersion, ipvsModules, err := GetKernelVersionAndIPVSMods(r.Executor)
|
|
if err != nil {
|
|
errors = append(errors, err)
|
|
}
|
|
|
|
// Find out loaded kernel modules
|
|
out, err := r.Executor.Command("cut", "-f1", "-d", " ", "/proc/modules").CombinedOutput()
|
|
if err != nil {
|
|
errors = append(errors, fmt.Errorf("error getting installed ipvs required kernel modules: %v(%s)", err, out))
|
|
return nil, errors
|
|
}
|
|
mods := strings.Split(string(out), "\n")
|
|
|
|
wantModules := sets.NewString()
|
|
loadModules := sets.NewString()
|
|
wantModules.Insert(ipvsModules...)
|
|
loadModules.Insert(mods...)
|
|
modules := wantModules.Difference(loadModules).UnsortedList()
|
|
|
|
// Check builtin modules exist or not
|
|
if len(modules) != 0 {
|
|
builtinModsFilePath := fmt.Sprintf("/lib/modules/%s/modules.builtin", kernelVersion)
|
|
out, err := r.Executor.Command("cut", "-f1", "-d", " ", builtinModsFilePath).CombinedOutput()
|
|
if err != nil {
|
|
errors = append(errors, fmt.Errorf("error getting required builtin kernel modules: %v(%s)", err, out))
|
|
return nil, errors
|
|
}
|
|
|
|
builtInModules := sets.NewString()
|
|
for _, builtInMode := range ipvsModules {
|
|
match, _ := regexp.Match(builtInMode+".ko", out)
|
|
if !match {
|
|
builtInModules.Insert(string(builtInMode))
|
|
}
|
|
}
|
|
if len(builtInModules) != 0 {
|
|
warnings = append(warnings, fmt.Errorf(dedent.Dedent(`
|
|
|
|
The IPVS proxier may not be used because the following required kernel modules are not loaded: %v
|
|
or no builtin kernel IPVS support was found: %v.
|
|
However, these modules may be loaded automatically by kube-proxy if they are available on your system.
|
|
To verify IPVS support:
|
|
|
|
Run "lsmod | grep 'ip_vs|nf_conntrack'" and verify each of the above modules are listed.
|
|
|
|
If they are not listed, you can use the following methods to load them:
|
|
|
|
1. For each missing module run 'modprobe $modulename' (e.g., 'modprobe ip_vs', 'modprobe ip_vs_rr', ...)
|
|
2. If 'modprobe $modulename' returns an error, you will need to install the missing module support for your kernel.
|
|
`), modules, builtInModules))
|
|
}
|
|
}
|
|
|
|
return warnings, errors
|
|
}
|