func (svc *IService) create() (*docker.Container, error) {
var config dockerclient.Config
cd := &docker.ContainerDefinition{
dockerclient.CreateContainerOptions{Name: svc.name(), Config: &config},
dockerclient.HostConfig{},
}
config.Image = commons.JoinRepoTag(svc.Repo, svc.Tag)
config.Cmd = []string{"/bin/sh", "-c", svc.Command()}
// NOTE: USE WITH CARE!
// Enabling host networking for an isvc may expose ports
// of the isvcs to access outside of the serviced host, potentially
// compromising security.
if svc.HostNetwork {
cd.NetworkMode = "host"
glog.Warningf("Host networking enabled for isvc %s", svc.Name)
}
// attach all exported ports
if svc.PortBindings != nil && len(svc.PortBindings) > 0 {
config.ExposedPorts = make(map[dockerclient.Port]struct{})
cd.PortBindings = make(map[dockerclient.Port][]dockerclient.PortBinding)
for _, binding := range svc.PortBindings {
port := dockerclient.Port(fmt.Sprintf("%d", binding.HostPort))
config.ExposedPorts[port] = struct{}{}
portBinding := dockerclient.PortBinding{
HostIp: getHostIp(binding),
HostPort: port.Port(),
}
cd.PortBindings[port] = append(cd.PortBindings[port], portBinding)
}
}
glog.V(1).Infof("Bindings for %s = %v", svc.Name, cd.PortBindings)
// copy any links to other isvcs
if svc.Links != nil && len(svc.Links) > 0 {
// To use a link, the source container must be instantiated already, so
// the service using a link can't be in the first start group.
//
// FIXME: Other sanity checks we could add - make sure that the source
// container is not in the same group or a later group
if svc.StartGroup == 0 {
glog.Fatalf("isvc %s can not use docker Links with StartGroup=0", svc.Name)
}
cd.Links = make([]string, len(svc.Links))
copy(cd.Links, svc.Links)
glog.V(1).Infof("Links for %s = %v", svc.Name, cd.Links)
}
// attach all exported volumes
config.Volumes = make(map[string]struct{})
cd.Binds = []string{}
// service-specific volumes
if svc.Volumes != nil && len(svc.Volumes) > 0 {
for src, dest := range svc.Volumes {
hostpath := svc.getResourcePath(src)
if exists, _ := isDir(hostpath); !exists {
if err := os.MkdirAll(hostpath, 0777); err != nil {
glog.Errorf("could not create %s on host: %s", hostpath, err)
return nil, err
}
}
cd.Binds = append(cd.Binds, fmt.Sprintf("%s:%s", hostpath, dest))
config.Volumes[dest] = struct{}{}
}
}
// global volumes
if isvcsVolumes != nil && len(isvcsVolumes) > 0 {
for src, dest := range isvcsVolumes {
if exists, _ := isDir(src); !exists {
glog.Warningf("Could not mount source %s: path does not exist", src)
continue
}
cd.Binds = append(cd.Binds, fmt.Sprintf("%s:%s", src, dest))
config.Volumes[dest] = struct{}{}
}
}
// attach environment variables
for key, val := range envPerService[svc.Name] {
config.Env = append(config.Env, fmt.Sprintf("%s=%s", key, val))
}
return docker.NewContainer(cd, false, 5*time.Second, nil, nil)
}
// configureContainer creates and populates two structures, a docker client Config and a docker client HostConfig structure
// that are used to create and start a container respectively. The information used to populate the structures is pulled from
// the service, serviceState, and conn values that are passed into configureContainer.
func configureContainer(a *HostAgent, client *ControlClient,
svc *service.Service, serviceState *servicestate.ServiceState,
virtualAddressSubnet string) (*dockerclient.Config, *dockerclient.HostConfig, error) {
cfg := &dockerclient.Config{}
hcfg := &dockerclient.HostConfig{}
//get this service's tenantId for volume mapping
var tenantID string
err := client.GetTenantId(svc.ID, &tenantID)
if err != nil {
glog.Errorf("Failed getting tenantID for service: %s, %s", svc.ID, err)
return nil, nil, err
}
// get the system user
unused := 0
systemUser := user.User{}
err = client.GetSystemUser(unused, &systemUser)
if err != nil {
glog.Errorf("Unable to get system user account for agent %s", err)
return nil, nil, err
}
glog.V(1).Infof("System User %v", systemUser)
cfg.Image = svc.ImageID
// get the endpoints
cfg.ExposedPorts = make(map[dockerclient.Port]struct{})
hcfg.PortBindings = make(map[dockerclient.Port][]dockerclient.PortBinding)
if svc.Endpoints != nil {
glog.V(1).Info("Endpoints for service: ", svc.Endpoints)
for _, endpoint := range svc.Endpoints {
if endpoint.Purpose == "export" { // only expose remote endpoints
var port uint16
port = endpoint.PortNumber
if endpoint.PortTemplate != "" {
t := template.Must(template.New("PortTemplate").Funcs(funcmap).Parse(endpoint.PortTemplate))
b := bytes.Buffer{}
err := t.Execute(&b, serviceState)
if err == nil {
j, err := strconv.Atoi(b.String())
if err != nil {
glog.Errorf("%+v", err)
} else if j > 0 {
port = uint16(j)
}
}
}
var p string
switch endpoint.Protocol {
case commons.UDP:
p = fmt.Sprintf("%d/%s", port, "udp")
default:
p = fmt.Sprintf("%d/%s", port, "tcp")
}
cfg.ExposedPorts[dockerclient.Port(p)] = struct{}{}
hcfg.PortBindings[dockerclient.Port(p)] = append(hcfg.PortBindings[dockerclient.Port(p)], dockerclient.PortBinding{})
}
}
}
if len(tenantID) == 0 && len(svc.Volumes) > 0 {
// FIXME: find a better way of handling this error condition
glog.Fatalf("Could not get tenant ID and need to mount a volume, service state: %s, service id: %s", serviceState.ID, svc.ID)
}
// Make sure the image exists locally.
if _, err = docker.FindImage(svc.ImageID, true); err != nil {
glog.Errorf("can't find docker image %s: %s", svc.ImageID, err)
return nil, nil, err
}
cfg.Volumes = make(map[string]struct{})
hcfg.Binds = []string{}
if err := injectContext(svc, serviceState, client); err != nil {
glog.Errorf("Error injecting context: %s", err)
return nil, nil, err
}
for _, volume := range svc.Volumes {
if volume.Type != "" && volume.Type != "dfs" {
continue
}
resourcePath, err := a.setupVolume(tenantID, svc, volume)
if err != nil {
return nil, nil, err
}
binding := fmt.Sprintf("%s:%s", resourcePath, volume.ContainerPath)
cfg.Volumes[strings.Split(binding, ":")[1]] = struct{}{}
hcfg.Binds = append(hcfg.Binds, strings.TrimSpace(binding))
}
dir, binary, err := ExecPath()
if err != nil {
glog.Errorf("Error getting exec path: %v", err)
return nil, nil, err
}
volumeBinding := fmt.Sprintf("%s:/serviced", dir)
cfg.Volumes[strings.Split(volumeBinding, ":")[1]] = struct{}{}
hcfg.Binds = append(hcfg.Binds, strings.TrimSpace(volumeBinding))
// bind mount everything we need for logstash-forwarder
if len(svc.LogConfigs) != 0 {
const LOGSTASH_CONTAINER_DIRECTORY = "/usr/local/serviced/resources/logstash"
logstashPath := utils.ResourcesDir() + "/logstash"
binding := fmt.Sprintf("%s:%s", logstashPath, LOGSTASH_CONTAINER_DIRECTORY)
cfg.Volumes[LOGSTASH_CONTAINER_DIRECTORY] = struct{}{}
hcfg.Binds = append(hcfg.Binds, binding)
glog.V(1).Infof("added logstash bind mount: %s", binding)
}
// specify temporary volume paths for docker to create
tmpVolumes := []string{"/tmp"}
for _, volume := range svc.Volumes {
if volume.Type == "tmp" {
tmpVolumes = append(tmpVolumes, volume.ContainerPath)
}
}
for _, path := range tmpVolumes {
cfg.Volumes[path] = struct{}{}
glog.V(4).Infof("added temporary docker container path: %s", path)
}
// add arguments to mount requested directory (if requested)
glog.V(2).Infof("Checking Mount options for service %#v", svc)
for _, bindMountString := range a.mount {
glog.V(2).Infof("bindmount is %#v", bindMountString)
splitMount := strings.Split(bindMountString, ",")
numMountArgs := len(splitMount)
if numMountArgs == 2 || numMountArgs == 3 {
requestedImage := splitMount[0]
glog.V(2).Infof("mount requestedImage %#v", requestedImage)
hostPath := splitMount[1]
glog.V(2).Infof("mount hostPath %#v", hostPath)
// assume the container path is going to be the same as the host path
containerPath := hostPath
// if the container path is provided, use it
if numMountArgs > 2 {
containerPath = splitMount[2]
}
glog.V(2).Infof("mount containerPath %#v", containerPath)
// insert tenantId into requestedImage - see facade.DeployService
matchedRequestedImage := false
if requestedImage == "*" {
matchedRequestedImage = true
} else {
imageID, err := commons.ParseImageID(requestedImage)
if err != nil {
glog.Errorf("error parsing imageid %v: %v", requestedImage, err)
continue
}
svcImageID, err := commons.ParseImageID(svc.ImageID)
if err != nil {
glog.Errorf("error parsing service imageid %v; %v", svc.ImageID, err)
continue
}
glog.V(2).Infof("mount checking %#v and %#v ", imageID, svcImageID)
matchedRequestedImage = (imageID.Repo == svcImageID.Repo)
}
if matchedRequestedImage {
binding := fmt.Sprintf("%s:%s", hostPath, containerPath)
cfg.Volumes[strings.Split(binding, ":")[1]] = struct{}{}
hcfg.Binds = append(hcfg.Binds, strings.TrimSpace(binding))
}
} else {
glog.Warningf("Could not bind mount the following: %s", bindMountString)
}
}
// Get host IP
ips, err := utils.GetIPv4Addresses()
if err != nil {
glog.Errorf("Error getting host IP addresses: %v", err)
return nil, nil, err
}
// add arguments for environment variables
cfg.Env = append([]string{},
fmt.Sprintf("CONTROLPLANE_SYSTEM_USER=%s", systemUser.Name),
fmt.Sprintf("CONTROLPLANE_SYSTEM_PASSWORD=%s", systemUser.Password),
fmt.Sprintf("CONTROLPLANE_HOST_IPS='%s'", strings.Join(ips, " ")),
fmt.Sprintf("SERVICED_VIRTUAL_ADDRESS_SUBNET=%s", virtualAddressSubnet),
fmt.Sprintf("SERVICED_IS_SERVICE_SHELL=false"),
fmt.Sprintf("SERVICED_NOREGISTRY=%s", os.Getenv("SERVICED_NOREGISTRY")),
fmt.Sprintf("SERVICED_SERVICE_IMAGE=%s", svc.ImageID),
fmt.Sprintf("SERVICED_MAX_RPC_CLIENTS=1"),
fmt.Sprintf("SERVICED_RPC_PORT=%s", a.rpcport),
fmt.Sprintf("TZ=%s", os.Getenv("TZ")))
// add dns values to setup
for _, addr := range a.dockerDNS {
_addr := strings.TrimSpace(addr)
if len(_addr) > 0 {
cfg.Dns = append(cfg.Dns, addr)
}
}
// Add hostname if set
if svc.Hostname != "" {
cfg.Hostname = svc.Hostname
}
cfg.Cmd = append([]string{},
fmt.Sprintf("/serviced/%s", binary),
"service",
"proxy",
svc.ID,
strconv.Itoa(serviceState.InstanceID),
svc.Startup)
if svc.Privileged {
hcfg.Privileged = true
}
// Memory and CpuShares should never be negative
if svc.MemoryLimit < 0 {
cfg.Memory = 0
} else {
cfg.Memory = svc.MemoryLimit
}
if svc.CPUShares < 0 {
cfg.CpuShares = 0
} else {
cfg.CpuShares = svc.CPUShares
}
return cfg, hcfg, nil
}
