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44 lines
990 B
Go
44 lines
990 B
Go
package syssetup
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import (
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"io/ioutil"
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"os"
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"os/exec"
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"github.com/sirupsen/logrus"
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)
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var (
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callIPTablesFile = "/proc/sys/net/bridge/bridge-nf-call-iptables"
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forward = "/proc/sys/net/ipv4/ip_forward"
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)
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func loadKernelModule(moduleName string) {
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if _, err := os.Stat("/sys/module/" + moduleName); err == nil {
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logrus.Infof("module %s was already loaded", moduleName)
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return
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}
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if err := exec.Command("modprobe", moduleName).Run(); err != nil {
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logrus.Warnf("failed to start %s module", moduleName)
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}
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}
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func Configure() error {
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loadKernelModule("br_netfilter")
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if err := ioutil.WriteFile(callIPTablesFile, []byte("1"), 0640); err != nil {
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logrus.Warnf("failed to write value 1 at %s: %v", callIPTablesFile, err)
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return nil
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}
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if err := ioutil.WriteFile(forward, []byte("1"), 0640); err != nil {
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logrus.Warnf("failed to write value 1 at %s: %v", forward, err)
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return nil
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}
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loadKernelModule("overlay")
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loadKernelModule("nf_conntrack")
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return nil
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}
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