forked from deis/deis
/
dockercli.go
267 lines (251 loc) · 6.76 KB
/
dockercli.go
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// Package dockercli provides helper functions for testing with Docker.
package dockercli
import (
"bufio"
"crypto/tls"
"fmt"
"io"
"log"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"testing"
"time"
"github.com/deis/deis/tests/utils"
"github.com/docker/docker/api/client"
)
const (
defaultKeyFile = "key.pem"
defaultCertFile = "cert.pem"
)
// CloseWrap ensures that an io.Writer is closed.
func CloseWrap(args ...io.Closer) error {
e := false
ret := fmt.Errorf("Error closing elements")
for _, c := range args {
if err := c.Close(); err != nil {
e = true
ret = fmt.Errorf("%s\n%s", ret, err)
}
}
if e {
return ret
}
return nil
}
// DeisServiceTest tries to connect to a container and port using the
// specified protocol.
func DeisServiceTest(
t *testing.T, container string, port string, protocol string) {
ipaddr := utils.HostAddress()
if ipaddr == "" {
ipaddr = GetInspectData(
t, "{{ .NetworkSettings.ipaddr }}", container)
}
fmt.Println("Running service test for " + container)
if strings.Contains(ipaddr, "Error") {
t.Fatalf("wrong IP %s", ipaddr)
}
if protocol == "http" {
url := "http://" + ipaddr + ":" + port
response, err := http.Get(url)
if err != nil {
t.Fatalf("Not reachable %s", err)
}
fmt.Println(response)
}
if protocol == "tcp" || protocol == "udp" {
conn, err := net.Dial(protocol, ipaddr+":"+port)
if err != nil {
t.Fatalf("Not reachable %s", err)
}
_, err = conn.Write([]byte("HEAD"))
if err != nil {
t.Fatalf("Not reachable %s", err)
}
}
}
// DockerHost returns the protocol and address of the docker server.
func DockerHost() (string, string, error) {
dockerHost := os.Getenv("DOCKER_HOST")
if dockerHost == "" {
dockerHost = "unix:///var/run/docker.sock"
}
u, err := url.Parse(dockerHost)
if err != nil {
return "", "", err
}
if u.Scheme == "unix" {
return u.Scheme, u.Path, nil
}
return u.Scheme, u.Host, nil
}
// NewClient returns a new docker test client.
func NewClient() (
cli *client.DockerCli, stdout *io.PipeReader, stdoutPipe *io.PipeWriter) {
proto, addr, _ := DockerHost()
stdout, stdoutPipe = io.Pipe()
dockerCertPath := os.Getenv("DOCKER_CERT_PATH")
// Boot2docker use TLS per default, Jenkins not
if dockerCertPath != "" {
var (
tlsConfig tls.Config
)
tlsConfig.InsecureSkipVerify = true
flCert := filepath.Join(dockerCertPath, defaultCertFile)
flKey := filepath.Join(dockerCertPath, defaultKeyFile)
_, errCert := os.Stat(flCert)
_, errKey := os.Stat(flKey)
if errCert == nil && errKey == nil {
cert, err := tls.LoadX509KeyPair(flCert, flKey)
if err != nil {
log.Fatalf("Couldn't load X509 key pair: %s. Key encrypted?", err)
}
tlsConfig.Certificates = []tls.Certificate{cert}
}
// Avoid fallback to SSL protocols < TLS1.0
tlsConfig.MinVersion = tls.VersionTLS10
cli = client.NewDockerCli(nil, stdoutPipe, nil, nil, proto, addr, &tlsConfig)
} else {
cli = client.NewDockerCli(nil, stdoutPipe, nil, nil, proto, addr, nil)
}
return
}
// PrintToStdout prints a string to stdout.
func PrintToStdout(t *testing.T, stdout *io.PipeReader,
stdoutPipe *io.PipeWriter, stoptag string) string {
var result string
r := bufio.NewReader(stdout)
for {
cmdBytes, err := r.ReadString('\n')
if err != nil {
break
}
result = cmdBytes
fmt.Print(cmdBytes)
if strings.Contains(cmdBytes, stoptag) == true {
if err := CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatal(err)
}
}
}
return result
}
// GetInspectData prints and returns `docker inspect` data for a container.
func GetInspectData(t *testing.T, format string, container string) string {
var inspectData string
cli, stdout, stdoutPipe := NewClient()
fmt.Println("Getting inspect data :" + format + ":" + container)
go func() {
err := cli.CmdInspect("--format", format, container)
if err != nil {
fmt.Printf("%s %s", format, err)
}
if err = CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatalf("inspect data failed %s", err)
}
}()
go func() {
time.Sleep(3000 * time.Millisecond)
if err := CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatalf("Inspect data %s", err)
}
}()
time.Sleep(1000 * time.Millisecond)
inspectData = PrintToStdout(t, stdout, stdoutPipe, "get inspect data")
return strings.TrimSuffix(inspectData, "\n")
}
// RunContainer runs a docker image with the given arguments.
func RunContainer(cli *client.DockerCli, args ...string) error {
// fmt.Println("--- Run docker container", args[1])
err := cli.CmdRun(args...)
if err != nil {
// Ignore certain errors we see in io handling.
switch msg := err.Error(); {
case strings.Contains(msg, "read/write on closed pipe"):
err = nil
case strings.Contains(msg, "Code: -1"):
err = nil
case strings.Contains(msg, "Code: 2"):
err = nil
}
}
return err
}
// RunDeisDataTest starts a data container as a prerequisite for a service.
func RunDeisDataTest(t *testing.T, args ...string) {
done := make(chan bool, 1)
cli, stdout, stdoutPipe := NewClient()
var hostname string
fmt.Println(args[2] + " test")
hostname = GetInspectData(t, "{{ .Config.Hostname }}", args[1])
fmt.Println("data container " + hostname)
done <- true
if strings.Contains(hostname, "Error") {
go func() {
<-done
if err := RunContainer(cli, args...); err != nil {
t.Fatal(err)
}
}()
go func() {
time.Sleep(3000 * time.Millisecond)
if err := CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatalf("Inspect Element %s", err)
}
}()
PrintToStdout(t, stdout, stdoutPipe, "running"+args[1])
}
}
// GetImageID returns the ID of a docker image.
func GetImageID(t *testing.T, repo string) string {
var imageID string
cli, stdout, stdoutPipe := NewClient()
go func() {
err := cli.CmdImages()
if err != nil {
t.Fatalf("GetImageID %s", err)
}
if err = CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatalf("GetImageID %s", err)
}
}()
imageID = PrintToStdout(t, stdout, stdoutPipe, repo)
return strings.Fields(imageID)[2]
}
// RunTestEtcd starts an etcd docker container for testing.
func RunTestEtcd(t *testing.T, name string, port string) {
var err error
cli, stdout, stdoutPipe := NewClient()
etcdImage := "deis/test-etcd:latest"
ipaddr := utils.HostAddress()
etcdAddr := ipaddr + ":" + port
fmt.Printf("--- Running deis/test-etcd at %s\n", etcdAddr)
done2 := make(chan bool, 1)
go func() {
done2 <- true
_ = cli.CmdRm("-f", name)
err = RunContainer(cli,
"--name", name,
"--rm",
"-p", port+":"+port,
"-e", "HOST_IP="+ipaddr,
"-e", "ETCD_ADDR="+etcdAddr,
etcdImage)
}()
go func() {
<-done2
time.Sleep(5000 * time.Millisecond)
if err := CloseWrap(stdout, stdoutPipe); err != nil {
t.Fatalf("runEtcdTest %s", err)
}
}()
time.Sleep(1000 * time.Millisecond)
PrintToStdout(t, stdout, stdoutPipe, "pulling etcd")
if err != nil {
t.Fatal(err)
}
}