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Add support for builtin modules in kube-proxy

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Signed-off-by: Ricardo Pchevuzinske Katz <ricardo.katz@serpro.gov.br>
This commit is contained in:
Ricardo Pchevuzinske Katz 2019-10-22 17:48:41 -03:00
parent 9fa1bc8003
commit 6aaae7d646
1 changed files with 16 additions and 3 deletions
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19
pkg/proxy/ipvs/proxier.go
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@ -582,11 +582,24 @@ func (handle *LinuxKernelHandler) GetModules() ([]string, error) {
var bmods []string
// Find out loaded kernel modules. If this is a full static kernel it will thrown an error
// Find out loaded kernel modules. If this is a full static kernel it will try to verify if the module is compiled using /boot/config-KERNELVERSION
modulesFile, err := os.Open("/proc/modules")
if err == os.ErrNotExist {
klog.Warningf("Failed to read file /proc/modules with error %v. Assuming this is a kernel without loadable modules support enabled", err)
kernelConfigFile := fmt.Sprintf("/boot/config-%s", kernelVersionStr)
kConfig, err := ioutil.ReadFile(kernelConfigFile)
if err != nil {
return nil, fmt.Errorf("Failed to read Kernel Config file %s with error %v", kernelConfigFile, err)
}
for _, module := range ipvsModules {
if match, _ := regexp.Match("CONFIG_"+strings.ToUpper(module)+"=y", kConfig); match {
bmods = append(bmods, module)
}
}
return bmods, nil
}
if err != nil {
klog.Warningf("Failed to read file /proc/modules with error %v. Kube-proxy requires loadable modules support enabled in the kernel", err)
return nil, err
return nil, fmt.Errorf("Failed to read file /proc/modules with error %v", err)
}
mods, err := getFirstColumn(modulesFile)