func CreateContainer(containerName, image, domain string, portsToMap []Port, environmentVars map[string]string) (*docker.Container, error) {
cfg := &docker.Config{}
cfg.Image = image
cfg.Hostname = containerName
cfg.Domainname = domain
var e struct{}
exposedPorts := make(map[docker.Port]struct{})
for _, p := range portsToMap {
prt := strconv.FormatUint(p.Private, 10) + "/" + p.Type
exposedPorts[docker.Port(prt)] = e
fmt.Printf("Exposing %s\n", prt)
}
cfg.ExposedPorts = exposedPorts
envStrs := make([]string, 0, 10)
for k, v := range environmentVars {
envStrs = append(envStrs, k+"="+v)
}
cfg.Env = envStrs
hostCfg := &docker.HostConfig{}
hostCfg.PublishAllPorts = false
hostCfg.Privileged = false
hostPorts := make(map[docker.Port][]docker.PortBinding)
for _, p := range portsToMap {
prt := strconv.FormatUint(p.Private, 10) + "/" + p.Type
bindings := make([]docker.PortBinding, 0, 4)
bindings = append(bindings, docker.PortBinding{HostIP: "", HostPort: strconv.FormatUint(p.Public, 10)})
fmt.Printf("Binding %s to %s\n", prt, bindings[0])
hostPorts[docker.Port(prt)] = bindings
}
hostCfg.PortBindings = hostPorts
opts := docker.CreateContainerOptions{}
opts.Config = cfg
opts.Name = containerName
opts.HostConfig = hostCfg
json, _ := data.PrettyPrint(opts)
fmt.Printf("create options: %s\n", string(json))
container, err := client.CreateContainer(opts)
if err != nil {
fmt.Fprintf(os.Stderr, "Error creating container: %s\n", err.Error())
} else {
fmt.Printf("Container created: %s\n", container.ID)
}
return container, err
}
// DockerRun perform a docker run
func DockerRun(req *DockerRunRequest) (DockerRunResponse, error) {
response := DockerRunResponse{}
//logit.Info.Println("DockerRun called")
swarmURL := os.Getenv("SWARM_MANAGER_URL")
if swarmURL == "" {
logit.Error.Println("SWARM_MANAGER_URL not set")
return response, errors.New("SWARM_MANAGER_URL not set")
}
var envvars []string
var i = 0
if req.EnvVars != nil {
envvars = make([]string, len(req.EnvVars)+1)
for k, v := range req.EnvVars {
envvars[i] = k + "=" + v
i++
}
} else {
envvars = make([]string, 1)
}
if req.Profile == "" {
return response, errors.New("Profile was empty and should not be")
}
//typical case is to always add the profile constraint env var
//like SM, MED, LG, however in the case of a restore job, we
//use a hard constraint of the host ipaddress to pin
//the restored container to the same host as where the backup
//is stored
if req.IPAddress != "" {
envvars[i] = "constraint:host==~" + req.IPAddress
} else {
envvars[i] = "constraint:profile==~" + req.Profile
}
docker, err := dockerapi.NewClient(swarmURL)
if err != nil {
logit.Error.Println(err.Error())
return response, err
}
options := dockerapi.CreateContainerOptions{}
config := dockerapi.Config{}
config.Hostname = req.ContainerName
options.Config = &config
hostConfig := dockerapi.HostConfig{}
options.HostConfig = &hostConfig
options.Name = req.ContainerName
options.Config.Env = envvars
options.Config.Image = "crunchydata/" + req.Image
//logit.Info.Println("swarmapi using " + options.Config.Image + " as the image name")
options.Config.Volumes = make(map[string]struct{})
//TODO figure out cpu shares and memory settings, these are different
//than what I was using before due to me using the docker api directly
//with this swarm implementation...use the defaults for now
//options.HostConfig.CPUShares, err = strconv.ParseInt(req.CPU, 0, 64)
//if err != nil {
//logit.Error.Println(err.Error())
//return response, err
//}
//options.HostConfig.Memory = req.MEM
options.HostConfig.Binds = make([]string, 3)
options.HostConfig.Binds[0] = req.PGDataPath + ":/pgdata"
options.HostConfig.Binds[1] = "/var/cpm/data/keys:/keys"
options.HostConfig.Binds[2] = "/var/cpm/config:/syslogconfig"
container, err3 := docker.CreateContainer(options)
if err3 != nil {
logit.Error.Println(err3.Error())
return response, err3
}
var startResponse DockerStartResponse
startRequest := DockerStartRequest{}
startRequest.ContainerName = req.ContainerName
startResponse, err = DockerStart(&startRequest)
if err != nil {
logit.Error.Println(err.Error())
return response, err
}
logit.Info.Println(startResponse.Output)
//cmd := exec.Command(req.CommandPath, req.PGDataPath, req.ContainerName,
//req.Image, req.CPU, req.MEM, allEnvVars)
response.ID = container.ID
return response, nil
}
//
// Start a docker container, and create a connection to /attach to it and send
// and receive RPC commands.
//
func (d *Client) Start() (err error) {
path := os.Getenv("DOCKER_CERT_PATH")
if path != "" {
ca := fmt.Sprintf("%s/ca.pem", path)
cert := fmt.Sprintf("%s/cert.pem", path)
key := fmt.Sprintf("%s/key.pem", path)
d.dockerClient, err = docker.NewTLSClient(d.endpoint, cert, key, ca)
} else {
d.dockerClient, err = docker.NewClient(d.endpoint)
}
if err != nil {
return err
}
defaultConfig := &docker.Config{
OpenStdin: true,
Image: d.dockerImage,
}
defaultHostConfig := &docker.HostConfig{}
opts := docker.CreateContainerOptions{
Config: defaultConfig,
HostConfig: defaultHostConfig,
}
if d.name != "" {
opts.Name = d.name
}
c, err := d.dockerClient.CreateContainer(opts)
if err != nil {
return err
}
d.ID = c.ID
err = d.dockerClient.StartContainer(c.ID, defaultHostConfig)
if err != nil {
return err
}
attachOpts := docker.AttachToContainerOptions{
Container: d.ID,
Stdout: true,
Stdin: true,
Stderr: true,
Stream: true,
}
err = d.AttachStreamingContainer(attachOpts)
if err != nil {
return err
}
pipes := &dockerPipes{
d.clientConn,
&d.stdErrBuf,
0,
0,
}
d.rpcClient = rpc.NewClientWithCodec(jsonrpc.NewClientCodec(pipes))
return nil
}
