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Merge pull request #599 from bradrydzewski/remote-workers

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Updated Docker Client to accept TLS
This commit is contained in:
Brad Rydzewski 2014-10-22 23:50:43 -07:00
parent 063f1f4830 3cd1631c05
commit 1cb74a90e3
7 changed files with 179 additions and 102 deletions
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2
README.md
View file

@ -117,6 +117,8 @@ user=""
pass=""
[worker]
cert=""
key=""
nodes=[
"unix:///var/run/docker.sock",
"unix:///var/run/docker.sock"

30
cli/build.go
View file

@ -41,6 +41,21 @@ func NewBuildCommand() cli.Command {
Name: "publish",
Usage: "runs drone build with publishing enabled",
},
cli.StringFlag{
Name: "docker-host",
Value: "",
Usage: "docker daemon address",
},
cli.StringFlag{
Name: "docker-cert",
Value: "",
Usage: "docker daemon tls certificate",
},
cli.StringFlag{
Name: "docker-key",
Value: "",
Usage: "docker daemon tls key",
},
},
Action: func(c *cli.Context) {
buildCommandFunc(c)
@ -56,6 +71,10 @@ func buildCommandFunc(c *cli.Context) {
var publish = c.Bool("publish")
var path string
var dockerhost = c.String("docker-host")
var dockercert = c.String("docker-cert")
var dockerkey = c.String("docker-key")
// the path is provided as an optional argument that
// will otherwise default to $PWD/.drone.yml
if len(c.Args()) > 0 {
@ -80,12 +99,17 @@ func buildCommandFunc(c *cli.Context) {
log.SetPriority(log.LOG_DEBUG) //LOG_NOTICE
docker.Logging = false
var exit, _ = run(path, identity, publish, deploy, privileged)
var exit, _ = run(path, identity, dockerhost, dockercert, dockerkey, publish, deploy, privileged)
os.Exit(exit)
}
func run(path, identity string, publish, deploy, privileged bool) (int, error) {
dockerClient := docker.New()
// TODO this has gotten a bit out of hand. refactor input params
func run(path, identity, dockerhost, dockercert, dockerkey string, publish, deploy, privileged bool) (int, error) {
dockerClient, err := docker.NewHostCertFile(dockerhost, dockercert, dockerkey)
if err != nil {
log.Err(err.Error())
return EXIT_STATUS, err
}
// parse the private environment variables
envs := getParamMap("DRONE_ENV_")

2
packaging/root/etc/drone/drone.toml
View file

@ -65,6 +65,8 @@ datasource="/var/lib/drone/drone.sqlite"
# pass=""
# [worker]
# cert=""
# key=""
# nodes=[
# "unix:///var/run/docker.sock",
# "unix:///var/run/docker.sock"

5
server/main.go
View file

@ -60,9 +60,8 @@ var (
pub *pubsub.PubSub
// Docker configuration details.
tlscacert = config.String("docker-tlscacert", "")
tlscert = config.String("docker-tlscert", "")
tlskey = config.String("docker-tlskey", "")
dockercrt = config.String("docker-cert", "")
dockerkey = config.String("docker-key", "")
nodes StringArr
db *sql.DB

2
shared/build/build.go
View file

@ -262,7 +262,7 @@ func (b *Builder) setup() error {
if err != nil {
// if we have problems with the image make sure
// we remove it before we exit
b.dockerClient.Images.Remove(id)
log.Errf("failed to verify build image %s", id)
return err
}

205
shared/build/docker/client.go
View file

@ -2,6 +2,7 @@ package docker
import (
"bytes"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
@ -12,6 +13,7 @@ import (
"net/http/httputil"
"os"
"strings"
"time"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/pkg/term"
@ -32,35 +34,125 @@ var Logging = true
// New creates an instance of the Docker Client
func New() *Client {
c := &Client{}
c.setHost(DEFAULTUNIXSOCKET)
c.Images = &ImageService{c}
c.Containers = &ContainerService{c}
return c
return NewHost("")
}
func NewHost(address string) *Client {
c := &Client{}
func NewHost(uri string) *Client {
var cli, _ = NewHostCert(uri, nil, nil)
return cli
}
// parse the address and split
pieces := strings.Split(address, "://")
if len(pieces) == 2 {
c.proto = pieces[0]
c.addr = pieces[1]
} else if len(pieces) == 1 {
c.addr = pieces[0]
func NewHostCertFile(uri, cert, key string) (*Client, error) {
if len(key) == 0 || len(cert) == 0 {
return NewHostCert(uri, nil, nil)
}
certfile, err := ioutil.ReadFile(cert)
if err != nil {
return nil, err
}
keyfile, err := ioutil.ReadFile(key)
if err != nil {
return nil, err
}
return NewHostCert(uri, certfile, keyfile)
}
func NewHostCert(uri string, cert, key []byte) (*Client, error) {
var host = GetHost(uri)
var proto, addr = SplitProtoAddr(host)
var cli = new(Client)
cli.proto = proto
cli.addr = addr
cli.scheme = "http"
cli.Images = &ImageService{cli}
cli.Containers = &ContainerService{cli}
// if no certificate is provided returns the
// client with no TLS configured.
if cert == nil || key == nil || len(cert) == 0 || len(key) == 0 {
return cli, nil
}
c.Images = &ImageService{c}
c.Containers = &ContainerService{c}
return c
// loads the key value pair in pem format
pem, err := tls.X509KeyPair(cert, key)
if err != nil {
return nil, err
}
// setup the client TLS and store the certificate.
// also skip verification since we are (typically)
// going to be using certs for IP addresses.
cli.scheme = "https"
cli.tls = new(tls.Config)
cli.tls.InsecureSkipVerify = true
cli.tls.Certificates = []tls.Certificate{pem}
// disable compression for local socket communication.
if cli.proto == DEFAULTPROTOCOL {
cli.trans.DisableCompression = true
}
// creates a transport that uses the custom tls configuration
// to securely connect to remote Docker clients.
cli.trans = &http.Transport{
TLSClientConfig: cli.tls,
Dial: func(dial_network, dial_addr string) (net.Conn, error) {
return net.DialTimeout(cli.proto, cli.addr, 32*time.Second)
},
}
return cli, nil
}
// GetHost returns the Docker Host address in order to
// connect to the Docker Daemon. It implements a very
// simple set of fallthrough logic to determine which
// address to use.
func GetHost(host string) string {
// if a default value was provided this
// shoudl be used
if len(host) != 0 {
return host
}
// else attempt to use the DOCKER_HOST
// environment variable
var env = os.Getenv("DOCKER_HOST")
if len(env) != 0 {
return env
}
// else check to see if the default unix
// socket exists and return
_, err := os.Stat(DEFAULTUNIXSOCKET)
if err == nil {
return fmt.Sprintf("%s://%s", DEFAULTPROTOCOL, DEFAULTUNIXSOCKET)
}
// else return the standard TCP address
return fmt.Sprintf("tcp://0.0.0.0:%d", DEFAULTHTTPPORT)
}
// SplitProtoAddr is a helper function that splits
// a host into Protocol and Address.
func SplitProtoAddr(host string) (string, string) {
var parts = strings.Split(host, "://")
var proto, addr string
switch {
case len(parts) == 2:
proto = parts[0]
addr = parts[1]
default:
proto = "tcp"
addr = parts[0]
}
return proto, addr
}
type Client struct {
proto string
addr string
tls *tls.Config
trans *http.Transport
scheme string
proto string
addr string
Images *ImageService
Containers *ContainerService
@ -87,28 +179,6 @@ var (
ErrBadRequest = errors.New("Bad Request")
)
func (c *Client) setHost(defaultUnixSocket string) {
c.proto = DEFAULTPROTOCOL
c.addr = defaultUnixSocket
if os.Getenv("DOCKER_HOST") != "" {
pieces := strings.Split(os.Getenv("DOCKER_HOST"), "://")
if len(pieces) == 2 {
c.proto = pieces[0]
c.addr = pieces[1]
} else if len(pieces) == 1 {
c.addr = pieces[0]
}
} else {
// if the default socket doesn't exist then
// we'll try to connect to the default tcp address
if _, err := os.Stat(defaultUnixSocket); err != nil {
c.proto = "tcp"
c.addr = "0.0.0.0:2375"
}
}
}
// helper function used to make HTTP requests to the Docker daemon.
func (c *Client) do(method, path string, in, out interface{}) error {
// if data input is provided, serialize to JSON
@ -133,16 +203,13 @@ func (c *Client) do(method, path string, in, out interface{}) error {
req.Header.Set("Content-Type", "application/json")
// dial the host server
req.Host = c.addr
dial, err := net.Dial(c.proto, c.addr)
if err != nil {
return err
req.URL.Host = c.addr
req.URL.Scheme = "http"
if c.tls != nil {
req.URL.Scheme = "https"
}
// make the request
conn := httputil.NewClientConn(dial, nil)
resp, err := conn.Do(req)
defer conn.Close()
resp, err := c.HTTPClient().Do(req)
if err != nil {
return err
}
@ -184,7 +251,7 @@ func (c *Client) hijack(method, path string, setRawTerminal bool, out io.Writer)
req.Header.Set("Content-Type", "plain/text")
req.Host = c.addr
dial, err := net.Dial(c.proto, c.addr)
dial, err := c.Dial()
if err != nil {
if strings.Contains(err.Error(), "connection refused") {
return fmt.Errorf("Can't connect to docker daemon. Is 'docker -d' running on this host?")
@ -239,16 +306,13 @@ func (c *Client) stream(method, path string, in io.Reader, out io.Writer, header
req.Header.Set("Content-Type", "plain/text")
// dial the host server
req.Host = c.addr
dial, err := net.Dial(c.proto, c.addr)
if err != nil {
return err
req.URL.Host = c.addr
req.URL.Scheme = "http"
if c.tls != nil {
req.URL.Scheme = "https"
}
// make the request
conn := httputil.NewClientConn(dial, nil)
resp, err := conn.Do(req)
defer conn.Close()
resp, err := c.HTTPClient().Do(req)
if err != nil {
return err
}
@ -270,6 +334,7 @@ func (c *Client) stream(method, path string, in io.Reader, out io.Writer, header
// If no output we exit now with no errors
if out == nil {
io.Copy(ioutil.Discard, resp.Body)
return nil
}
@ -289,3 +354,23 @@ func (c *Client) stream(method, path string, in io.Reader, out io.Writer, header
return nil
}
func (c *Client) HTTPClient() *http.Client {
if c.trans != nil {
return &http.Client{Transport: c.trans}
}
return &http.Client{
Transport: &http.Transport{
Dial: func(dial_network, dial_addr string) (net.Conn, error) {
return net.DialTimeout(c.proto, c.addr, 32*time.Second)
},
},
}
}
func (c *Client) Dial() (net.Conn, error) {
if c.tls != nil && c.proto != "unix" {
return tls.Dial(c.proto, c.addr, c.tls)
}
return net.Dial(c.proto, c.addr)
}

35
shared/build/docker/client_test.go
View file

@ -1,7 +1,6 @@
package docker
import (
"io/ioutil"
"os"
"testing"
)
@ -31,37 +30,3 @@ func TestInvalidHostFromEnv(t *testing.T) {
t.Fail()
}
}
func TestSocketHost(t *testing.T) {
// create temporary file to represent the docker socket
file, err := ioutil.TempFile("", "TestDefaultUnixHost")
if err != nil {
t.Fail()
}
file.Close()
defer os.Remove(file.Name())
client := &Client{}
client.setHost(file.Name())
if client.proto != "unix" {
t.Fail()
}
if client.addr != file.Name() {
t.Fail()
}
}
func TestDefaultTcpHost(t *testing.T) {
client := &Client{}
client.setHost("/tmp/missing_socket")
if client.proto != "tcp" {
t.Fail()
}
if client.addr != "0.0.0.0:2375" {
t.Fail()
}
}