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//go:build linux || freebsd
// +build linux freebsd
package testutils
import (
"os"
"runtime"
"syscall"
"testing"
"github.com/docker/libnetwork/ns"
)
// SetupTestOSContext joins a new network namespace, and returns its associated
// teardown function.
//
// Example usage:
//
// defer SetupTestOSContext(t)()
func SetupTestOSContext(t *testing.T) func() {
runtime.LockOSThread()
if err := syscall.Unshare(syscall.CLONE_NEWNET); err != nil {
t.Fatalf("Failed to enter netns: %v", err)
}
fd, err := syscall.Open("/proc/self/ns/net", syscall.O_RDONLY, 0)
if err != nil {
t.Fatal("Failed to open netns file")
}
// Since we are switching to a new test namespace make
// sure to re-initialize initNs context
ns.Init()
runtime.LockOSThread()
return func() {
if err := syscall.Close(fd); err != nil {
t.Logf("Warning: netns closing failed (%v)", err)
}
runtime.UnlockOSThread()
}
}
// RunningOnCircleCI returns true if being executed on libnetwork Circle CI setup
func RunningOnCircleCI() bool {
return os.Getenv("CIRCLECI") != ""
}
|
