forked from contiv-experimental/libcompose
/
convert.go
145 lines (127 loc) · 3.72 KB
/
convert.go
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package docker
import (
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/pkg/nat"
"github.com/docker/docker/runconfig"
"github.com/docker/libcompose/project"
"github.com/docker/libcompose/utils"
"github.com/samalba/dockerclient"
)
// Filter filters the specified string slice with the specified function.
func Filter(vs []string, f func(string) bool) []string {
r := make([]string, 0, len(vs))
for _, v := range vs {
if f(v) {
r = append(r, v)
}
}
return r
}
func isBind(s string) bool {
return strings.ContainsRune(s, ':')
}
func isVolume(s string) bool {
return !isBind(s)
}
// ConvertToAPI converts a service configuration to a docker API container configuration.
func ConvertToAPI(c *project.ServiceConfig) (*dockerclient.ContainerConfig, error) {
config, hostConfig, err := Convert(c)
if err != nil {
return nil, err
}
var result dockerclient.ContainerConfig
err = utils.ConvertByJSON(config, &result)
if err != nil {
logrus.Errorf("Failed to convert config to API structure: %v\n%#v", err, config)
return nil, err
}
err = utils.ConvertByJSON(hostConfig, &result.HostConfig)
if err != nil {
logrus.Errorf("Failed to convert hostConfig to API structure: %v\n%#v", err, hostConfig)
}
return &result, err
}
// Convert converts a service configuration to an docker inner representation (using runconfig structures)
func Convert(c *project.ServiceConfig) (*runconfig.Config, *runconfig.HostConfig, error) {
vs := Filter(c.Volumes, isVolume)
volumes := make(map[string]struct{}, len(vs))
for _, v := range vs {
volumes[v] = struct{}{}
}
ports, binding, err := nat.ParsePortSpecs(c.Ports)
if err != nil {
return nil, nil, err
}
restart, err := runconfig.ParseRestartPolicy(c.Restart)
if err != nil {
return nil, nil, err
}
exposedPorts, _, err := nat.ParsePortSpecs(c.Expose)
if err != nil {
return nil, nil, err
}
for k, v := range exposedPorts {
ports[k] = v
}
deviceMappings, err := parseDevices(c.Devices)
if err != nil {
return nil, nil, err
}
config := &runconfig.Config{
Entrypoint: runconfig.NewEntrypoint(c.Entrypoint.Slice()...),
Hostname: c.Hostname,
Domainname: c.DomainName,
User: c.User,
Env: c.Environment.Slice(),
Cmd: runconfig.NewCommand(c.Command.Slice()...),
Image: c.Image,
Labels: c.Labels.MapParts(),
ExposedPorts: ports,
Tty: c.Tty,
OpenStdin: c.StdinOpen,
WorkingDir: c.WorkingDir,
VolumeDriver: c.VolumeDriver,
Volumes: volumes,
}
hostConfig := &runconfig.HostConfig{
VolumesFrom: c.VolumesFrom,
CapAdd: runconfig.NewCapList(c.CapAdd),
CapDrop: runconfig.NewCapList(c.CapDrop),
CPUShares: c.CPUShares,
CpusetCpus: c.CPUSet,
ExtraHosts: c.ExtraHosts,
Privileged: c.Privileged,
Binds: Filter(c.Volumes, isBind),
Devices: deviceMappings,
DNS: c.DNS.Slice(),
DNSSearch: c.DNSSearch.Slice(),
LogConfig: runconfig.LogConfig{
Type: c.LogDriver,
Config: c.LogOpt,
},
Memory: c.MemLimit,
MemorySwap: c.MemSwapLimit,
NetworkMode: runconfig.NetworkMode(c.Net),
ReadonlyRootfs: c.ReadOnly,
PidMode: runconfig.PidMode(c.Pid),
UTSMode: runconfig.UTSMode(c.Uts),
IpcMode: runconfig.IpcMode(c.Ipc),
PortBindings: binding,
RestartPolicy: restart,
SecurityOpt: c.SecurityOpt,
}
return config, hostConfig, nil
}
func parseDevices(devices []string) ([]runconfig.DeviceMapping, error) {
// parse device mappings
deviceMappings := []runconfig.DeviceMapping{}
for _, device := range devices {
deviceMapping, err := runconfig.ParseDevice(device)
if err != nil {
return nil, err
}
deviceMappings = append(deviceMappings, deviceMapping)
}
return deviceMappings, nil
}