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daemon_swarm.go
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daemon_swarm.go
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package main
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
"github.com/docker/docker/pkg/integration/checker"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/filters"
"github.com/docker/engine-api/types/swarm"
"github.com/go-check/check"
)
// SwarmDaemon is a test daemon with helpers for participating in a swarm.
type SwarmDaemon struct {
*Daemon
swarm.Info
port int
listenAddr string
}
// Init initializes a new swarm cluster.
func (d *SwarmDaemon) Init(req swarm.InitRequest) error {
if req.ListenAddr == "" {
req.ListenAddr = d.listenAddr
}
status, out, err := d.SockRequest("POST", "/swarm/init", req)
if status != http.StatusOK {
return fmt.Errorf("initializing swarm: invalid statuscode %v, %q", status, out)
}
if err != nil {
return fmt.Errorf("initializing swarm: %v", err)
}
info, err := d.info()
if err != nil {
return err
}
d.Info = info
return nil
}
// Join joins a daemon to an existing cluster.
func (d *SwarmDaemon) Join(req swarm.JoinRequest) error {
if req.ListenAddr == "" {
req.ListenAddr = d.listenAddr
}
status, out, err := d.SockRequest("POST", "/swarm/join", req)
if status != http.StatusOK {
return fmt.Errorf("joining swarm: invalid statuscode %v, %q", status, out)
}
if err != nil {
return fmt.Errorf("joining swarm: %v", err)
}
info, err := d.info()
if err != nil {
return err
}
d.Info = info
return nil
}
// Leave forces daemon to leave current cluster.
func (d *SwarmDaemon) Leave(force bool) error {
url := "/swarm/leave"
if force {
url += "?force=1"
}
status, out, err := d.SockRequest("POST", url, nil)
if status != http.StatusOK {
return fmt.Errorf("leaving swarm: invalid statuscode %v, %q", status, out)
}
if err != nil {
err = fmt.Errorf("leaving swarm: %v", err)
}
return err
}
func (d *SwarmDaemon) info() (swarm.Info, error) {
var info struct {
Swarm swarm.Info
}
status, dt, err := d.SockRequest("GET", "/info", nil)
if status != http.StatusOK {
return info.Swarm, fmt.Errorf("get swarm info: invalid statuscode %v", status)
}
if err != nil {
return info.Swarm, fmt.Errorf("get swarm info: %v", err)
}
if err := json.Unmarshal(dt, &info); err != nil {
return info.Swarm, err
}
return info.Swarm, nil
}
type serviceConstructor func(*swarm.Service)
type nodeConstructor func(*swarm.Node)
type specConstructor func(*swarm.Spec)
func (d *SwarmDaemon) createService(c *check.C, f ...serviceConstructor) string {
var service swarm.Service
for _, fn := range f {
fn(&service)
}
status, out, err := d.SockRequest("POST", "/services/create", service.Spec)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusCreated, check.Commentf("output: %q", string(out)))
var scr types.ServiceCreateResponse
c.Assert(json.Unmarshal(out, &scr), checker.IsNil)
return scr.ID
}
func (d *SwarmDaemon) getService(c *check.C, id string) *swarm.Service {
var service swarm.Service
status, out, err := d.SockRequest("GET", "/services/"+id, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil)
c.Assert(json.Unmarshal(out, &service), checker.IsNil)
return &service
}
func (d *SwarmDaemon) getServiceTasks(c *check.C, service string) []swarm.Task {
var tasks []swarm.Task
filterArgs := filters.NewArgs()
filterArgs.Add("desired-state", "running")
filterArgs.Add("service", service)
filters, err := filters.ToParam(filterArgs)
c.Assert(err, checker.IsNil)
status, out, err := d.SockRequest("GET", "/tasks?filters="+filters, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil, check.Commentf(string(out)))
c.Assert(json.Unmarshal(out, &tasks), checker.IsNil)
return tasks
}
func (d *SwarmDaemon) checkRunningTaskImages(c *check.C) (interface{}, check.CommentInterface) {
var tasks []swarm.Task
filterArgs := filters.NewArgs()
filterArgs.Add("desired-state", "running")
filters, err := filters.ToParam(filterArgs)
c.Assert(err, checker.IsNil)
status, out, err := d.SockRequest("GET", "/tasks?filters="+filters, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil, check.Commentf(string(out)))
c.Assert(json.Unmarshal(out, &tasks), checker.IsNil)
result := make(map[string]int)
for _, task := range tasks {
if task.Status.State == swarm.TaskStateRunning {
result[task.Spec.ContainerSpec.Image]++
}
}
return result, nil
}
func (d *SwarmDaemon) checkNodeReadyCount(c *check.C) (interface{}, check.CommentInterface) {
nodes := d.listNodes(c)
var readyCount int
for _, node := range nodes {
if node.Status.State == swarm.NodeStateReady {
readyCount++
}
}
return readyCount, nil
}
func (d *SwarmDaemon) getTask(c *check.C, id string) swarm.Task {
var task swarm.Task
status, out, err := d.SockRequest("GET", "/tasks/"+id, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil, check.Commentf(string(out)))
c.Assert(json.Unmarshal(out, &task), checker.IsNil)
return task
}
func (d *SwarmDaemon) updateService(c *check.C, service *swarm.Service, f ...serviceConstructor) {
for _, fn := range f {
fn(service)
}
url := fmt.Sprintf("/services/%s/update?version=%d", service.ID, service.Version.Index)
status, out, err := d.SockRequest("POST", url, service.Spec)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
}
func (d *SwarmDaemon) removeService(c *check.C, id string) {
status, out, err := d.SockRequest("DELETE", "/services/"+id, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil)
}
func (d *SwarmDaemon) getNode(c *check.C, id string) *swarm.Node {
var node swarm.Node
status, out, err := d.SockRequest("GET", "/nodes/"+id, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil)
c.Assert(json.Unmarshal(out, &node), checker.IsNil)
c.Assert(node.ID, checker.Equals, id)
return &node
}
func (d *SwarmDaemon) removeNode(c *check.C, id string, force bool) {
url := "/nodes/" + id
if force {
url += "?force=1"
}
status, out, err := d.SockRequest("DELETE", url, nil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(err, checker.IsNil)
}
func (d *SwarmDaemon) updateNode(c *check.C, id string, f ...nodeConstructor) {
for i := 0; ; i++ {
node := d.getNode(c, id)
for _, fn := range f {
fn(node)
}
url := fmt.Sprintf("/nodes/%s/update?version=%d", node.ID, node.Version.Index)
status, out, err := d.SockRequest("POST", url, node.Spec)
if i < 10 && strings.Contains(string(out), "update out of sequence") {
time.Sleep(100 * time.Millisecond)
continue
}
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
return
}
}
func (d *SwarmDaemon) listNodes(c *check.C) []swarm.Node {
status, out, err := d.SockRequest("GET", "/nodes", nil)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
nodes := []swarm.Node{}
c.Assert(json.Unmarshal(out, &nodes), checker.IsNil)
return nodes
}
func (d *SwarmDaemon) listServices(c *check.C) []swarm.Service {
status, out, err := d.SockRequest("GET", "/services", nil)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
services := []swarm.Service{}
c.Assert(json.Unmarshal(out, &services), checker.IsNil)
return services
}
func (d *SwarmDaemon) getSwarm(c *check.C) swarm.Swarm {
var sw swarm.Swarm
status, out, err := d.SockRequest("GET", "/swarm", nil)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(json.Unmarshal(out, &sw), checker.IsNil)
return sw
}
func (d *SwarmDaemon) updateSwarm(c *check.C, f ...specConstructor) {
sw := d.getSwarm(c)
for _, fn := range f {
fn(&sw.Spec)
}
url := fmt.Sprintf("/swarm/update?version=%d", sw.Version.Index)
status, out, err := d.SockRequest("POST", url, sw.Spec)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
}
func (d *SwarmDaemon) rotateTokens(c *check.C) {
var sw swarm.Swarm
status, out, err := d.SockRequest("GET", "/swarm", nil)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(json.Unmarshal(out, &sw), checker.IsNil)
url := fmt.Sprintf("/swarm/update?version=%d&rotateWorkerToken=true&rotateManagerToken=true", sw.Version.Index)
status, out, err = d.SockRequest("POST", url, sw.Spec)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
}
func (d *SwarmDaemon) joinTokens(c *check.C) swarm.JoinTokens {
var sw swarm.Swarm
status, out, err := d.SockRequest("GET", "/swarm", nil)
c.Assert(err, checker.IsNil)
c.Assert(status, checker.Equals, http.StatusOK, check.Commentf("output: %q", string(out)))
c.Assert(json.Unmarshal(out, &sw), checker.IsNil)
return sw.JoinTokens
}
func (d *SwarmDaemon) checkLocalNodeState(c *check.C) (interface{}, check.CommentInterface) {
info, err := d.info()
c.Assert(err, checker.IsNil)
return info.LocalNodeState, nil
}
func (d *SwarmDaemon) checkControlAvailable(c *check.C) (interface{}, check.CommentInterface) {
info, err := d.info()
c.Assert(err, checker.IsNil)
c.Assert(info.LocalNodeState, checker.Equals, swarm.LocalNodeStateActive)
return info.ControlAvailable, nil
}
func (d *SwarmDaemon) cmdRetryOutOfSequence(args ...string) (string, error) {
for i := 0; ; i++ {
out, err := d.Cmd(args[0], args[1:]...)
if err != nil {
if strings.Contains(err.Error(), "update out of sequence") {
if i < 10 {
continue
}
}
}
return out, err
}
}