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|
package main
import (
"io/ioutil"
"os"
"path/filepath"
"reflect"
"syscall"
"time"
"github.com/containernetworking/cni/pkg/skel"
"github.com/containernetworking/cni/pkg/types/current"
"github.com/containernetworking/plugins/pkg/ns"
"github.com/containernetworking/plugins/pkg/testutils"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/vishvananda/netlink"
)
func cleanup(d dnsNameFile) error {
_ = d.stop()
return os.RemoveAll(filepath.Dir(d.PidFile))
}
var _ = Describe("dnsname tests", func() {
var originalNS, targetNS ns.NetNS
const IFNAME string = "dummy0"
fullConf := []byte(`{
"cniVersion": "0.4.0",
"name": "test",
"type": "dnsname",
"domainName": "foobar.io",
"prevResult": {
"cniVersion": "0.4.0",
"interfaces": [
{
"name": "dummy0",
"mac": "a6:a7:ca:6b:34:2e"
},
{
"name": "vetha0a83b38",
"mac": "9a:45:bd:b0:2d:dd"
},
{
"name": "eth0",
"mac": "ea:63:0e:63:3e:86",
"sandbox": "/var/run/netns/baude"
}
],
"ips": [
{
"version": "4",
"interface": 2,
"address": "10.88.8.5/24",
"gateway": "10.88.8.1"
}
],
"routes": [
{
"dst": "0.0.0.0/0"
}
]
}
}`)
BeforeEach(func() {
// Create a new NetNS so we don't modify the host
var err error
originalNS, err = testutils.NewNS()
Expect(err).NotTo(HaveOccurred())
err = originalNS.Do(func(ns.NetNS) error {
defer GinkgoRecover()
err = netlink.LinkAdd(&netlink.Dummy{
LinkAttrs: netlink.LinkAttrs{
Name: IFNAME,
},
})
Expect(err).NotTo(HaveOccurred())
_, err = netlink.LinkByName(IFNAME)
Expect(err).NotTo(HaveOccurred())
return nil
})
Expect(err).NotTo(HaveOccurred())
targetNS, err = testutils.NewNS()
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
Expect(originalNS.Close()).To(Succeed())
Expect(targetNS.Close()).To(Succeed())
})
It("dnsname add", func() {
args := &skel.CmdArgs{
ContainerID: "dummy",
Netns: targetNS.Path(),
IfName: IFNAME,
StdinData: fullConf,
}
err := originalNS.Do(func(ns.NetNS) error {
defer GinkgoRecover()
r, _, err := testutils.CmdAdd(targetNS.Path(), args.ContainerID, IFNAME, fullConf, func() error {
return cmdAdd(args)
})
Expect(err).NotTo(HaveOccurred())
_, err = current.GetResult(r)
Expect(err).NotTo(HaveOccurred())
// Check that all configuration files are created
files, err := ioutil.ReadDir("/run/containers/cni/dnsname/test")
Expect(err).To(BeNil())
expectedFileNames := []string{"addnhosts", "dnsmasq.conf", "lock", "pidfile"}
var resultingFileNames []string
for _, f := range files {
resultingFileNames = append(resultingFileNames, f.Name())
}
Expect(reflect.DeepEqual(expectedFileNames, resultingFileNames)).To(BeTrue())
d, err := newDNSMasqFile("foobar.io", "dummy0", "test")
Expect(err).To(BeNil())
// Check that the dns masq instance is running
pid, err := d.getProcess()
Expect(err).To(BeNil())
// Send it a signal 0; if alive, error will be nil
err = pid.Signal(syscall.Signal(0))
Expect(err).To(BeNil())
// Stop the dnsmasq instance and clean up files in the filesystem
Expect(cleanup(d)).To(BeNil())
return nil
})
Expect(err).NotTo(HaveOccurred())
})
It("dnsname del", func() {
var (
dnsDead bool
counter int
)
args := &skel.CmdArgs{
ContainerID: "dummy",
Netns: targetNS.Path(),
IfName: IFNAME,
StdinData: fullConf,
}
err := originalNS.Do(func(ns.NetNS) error {
defer GinkgoRecover()
r, _, err := testutils.CmdAdd(targetNS.Path(), args.ContainerID, IFNAME, fullConf, func() error {
return cmdAdd(args)
})
Expect(err).NotTo(HaveOccurred())
_, err = current.GetResult(r)
Expect(err).NotTo(HaveOccurred())
d, err := newDNSMasqFile("foobar.io", "dummy0", "test")
Expect(err).To(BeNil())
pid, err := d.getProcess()
Expect(err).To(BeNil())
err = pid.Signal(syscall.Signal(0))
Expect(err).To(BeNil())
err = testutils.CmdDel(targetNS.Path(), args.ContainerID, IFNAME, func() error {
return cmdDel(args)
})
Expect(err).To(BeNil())
// Ensure the dnsmasq instance has been stopped on del
// It sometimes takes time for the dnsmasq pid to be killed
// check every .5 second for maximum of 10 tries
for {
err = pid.Signal(syscall.Signal(0))
if err != nil {
dnsDead = true
break
}
if counter == 10 {
break
}
counter++
time.Sleep(500 * time.Millisecond)
}
Expect(dnsDead).To(BeTrue())
// Cleanup behind ourselves
Expect(cleanup(d)).To(BeNil())
return nil
})
Expect(err).NotTo(HaveOccurred())
})
})
|
