mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
360 lines
13 KiB
Go
360 lines
13 KiB
Go
package runconfig
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import (
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"fmt"
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"io/ioutil"
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"path"
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"strings"
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"github.com/docker/docker/nat"
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"github.com/docker/docker/opts"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/pkg/sysinfo"
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"github.com/docker/docker/pkg/units"
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"github.com/docker/docker/utils"
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)
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var (
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ErrInvalidWorkingDirectory = fmt.Errorf("The working directory is invalid. It needs to be an absolute path.")
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ErrConflictAttachDetach = fmt.Errorf("Conflicting options: -a and -d")
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ErrConflictDetachAutoRemove = fmt.Errorf("Conflicting options: --rm and -d")
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ErrConflictNetworkHostname = fmt.Errorf("Conflicting options: -h and the network mode (--net)")
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ErrConflictHostNetworkAndLinks = fmt.Errorf("Conflicting options: --net=host can't be used with links. This would result in undefined behavior.")
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)
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//FIXME Only used in tests
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func Parse(args []string, sysInfo *sysinfo.SysInfo) (*Config, *HostConfig, *flag.FlagSet, error) {
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cmd := flag.NewFlagSet("run", flag.ContinueOnError)
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cmd.SetOutput(ioutil.Discard)
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cmd.Usage = nil
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return parseRun(cmd, args, sysInfo)
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}
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// FIXME: this maps the legacy commands.go code. It should be merged with Parse to only expose a single parse function.
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func ParseSubcommand(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Config, *HostConfig, *flag.FlagSet, error) {
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return parseRun(cmd, args, sysInfo)
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}
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func parseRun(cmd *flag.FlagSet, args []string, sysInfo *sysinfo.SysInfo) (*Config, *HostConfig, *flag.FlagSet, error) {
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var (
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// FIXME: use utils.ListOpts for attach and volumes?
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flAttach = opts.NewListOpts(opts.ValidateAttach)
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flVolumes = opts.NewListOpts(opts.ValidatePath)
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flLinks = opts.NewListOpts(opts.ValidateLink)
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flEnv = opts.NewListOpts(opts.ValidateEnv)
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flDevices = opts.NewListOpts(opts.ValidatePath)
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flPublish opts.ListOpts
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flExpose opts.ListOpts
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flDns = opts.NewListOpts(opts.ValidateIPAddress)
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flDnsSearch = opts.NewListOpts(opts.ValidateDnsSearch)
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flVolumesFrom opts.ListOpts
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flLxcOpts opts.ListOpts
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flEnvFile opts.ListOpts
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flCapAdd opts.ListOpts
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flCapDrop opts.ListOpts
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flAutoRemove = cmd.Bool([]string{"#rm", "-rm"}, false, "Automatically remove the container when it exits (incompatible with -d)")
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flDetach = cmd.Bool([]string{"d", "-detach"}, false, "Detached mode: run container in the background and print new container ID")
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flNetwork = cmd.Bool([]string{"#n", "#-networking"}, true, "Enable networking for this container")
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flPrivileged = cmd.Bool([]string{"#privileged", "-privileged"}, false, "Give extended privileges to this container")
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flPublishAll = cmd.Bool([]string{"P", "-publish-all"}, false, "Publish all exposed ports to the host interfaces")
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flStdin = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached")
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flTty = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY")
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flContainerIDFile = cmd.String([]string{"#cidfile", "-cidfile"}, "", "Write the container ID to the file")
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flEntrypoint = cmd.String([]string{"#entrypoint", "-entrypoint"}, "", "Overwrite the default ENTRYPOINT of the image")
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flHostname = cmd.String([]string{"h", "-hostname"}, "", "Container host name")
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flMemoryString = cmd.String([]string{"m", "-memory"}, "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
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flUser = cmd.String([]string{"u", "-user"}, "", "Username or UID")
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flWorkingDir = cmd.String([]string{"w", "-workdir"}, "", "Working directory inside the container")
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flCpuShares = cmd.Int64([]string{"c", "-cpu-shares"}, 0, "CPU shares (relative weight)")
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flCpuset = cmd.String([]string{"-cpuset"}, "", "CPUs in which to allow execution (0-3, 0,1)")
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flNetMode = cmd.String([]string{"-net"}, "bridge", "Set the Network mode for the container\n'bridge': creates a new network stack for the container on the docker bridge\n'none': no networking for this container\n'container:<name|id>': reuses another container network stack\n'host': use the host network stack inside the container. Note: the host mode gives the container full access to local system services such as D-bus and is therefore considered insecure.")
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// For documentation purpose
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_ = cmd.Bool([]string{"#sig-proxy", "-sig-proxy"}, true, "Proxy received signals to the process (even in non-TTY mode). SIGCHLD, SIGSTOP, and SIGKILL are not proxied.")
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_ = cmd.String([]string{"#name", "-name"}, "", "Assign a name to the container")
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)
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cmd.Var(&flAttach, []string{"a", "-attach"}, "Attach to STDIN, STDOUT or STDERR.")
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cmd.Var(&flVolumes, []string{"v", "-volume"}, "Bind mount a volume (e.g., from the host: -v /host:/container, from Docker: -v /container)")
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cmd.Var(&flLinks, []string{"#link", "-link"}, "Add link to another container in the form of name:alias")
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cmd.Var(&flDevices, []string{"-device"}, "Add a host device to the container (e.g. --device=/dev/sdc:/dev/xvdc)")
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cmd.Var(&flEnv, []string{"e", "-env"}, "Set environment variables")
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cmd.Var(&flEnvFile, []string{"-env-file"}, "Read in a line delimited file of environment variables")
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cmd.Var(&flPublish, []string{"p", "-publish"}, fmt.Sprintf("Publish a container's port to the host\nformat: %s\n(use 'docker port' to see the actual mapping)", nat.PortSpecTemplateFormat))
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cmd.Var(&flExpose, []string{"#expose", "-expose"}, "Expose a port from the container without publishing it to your host")
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cmd.Var(&flDns, []string{"#dns", "-dns"}, "Set custom DNS servers")
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cmd.Var(&flDnsSearch, []string{"-dns-search"}, "Set custom DNS search domains")
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cmd.Var(&flVolumesFrom, []string{"#volumes-from", "-volumes-from"}, "Mount volumes from the specified container(s)")
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cmd.Var(&flLxcOpts, []string{"#lxc-conf", "-lxc-conf"}, "(lxc exec-driver only) Add custom lxc options --lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")
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cmd.Var(&flCapAdd, []string{"-cap-add"}, "Add Linux capabilities")
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cmd.Var(&flCapDrop, []string{"-cap-drop"}, "Drop Linux capabilities")
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if err := cmd.Parse(args); err != nil {
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return nil, nil, cmd, err
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}
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// Check if the kernel supports memory limit cgroup.
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if sysInfo != nil && *flMemoryString != "" && !sysInfo.MemoryLimit {
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*flMemoryString = ""
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}
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// Validate input params
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if *flDetach && flAttach.Len() > 0 {
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return nil, nil, cmd, ErrConflictAttachDetach
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}
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if *flWorkingDir != "" && !path.IsAbs(*flWorkingDir) {
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return nil, nil, cmd, ErrInvalidWorkingDirectory
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}
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if *flDetach && *flAutoRemove {
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return nil, nil, cmd, ErrConflictDetachAutoRemove
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}
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if *flNetMode != "bridge" && *flNetMode != "none" && *flHostname != "" {
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return nil, nil, cmd, ErrConflictNetworkHostname
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}
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if *flNetMode == "host" && flLinks.Len() > 0 {
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return nil, nil, cmd, ErrConflictHostNetworkAndLinks
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}
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// If neither -d or -a are set, attach to everything by default
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if flAttach.Len() == 0 && !*flDetach {
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if !*flDetach {
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flAttach.Set("stdout")
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flAttach.Set("stderr")
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if *flStdin {
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flAttach.Set("stdin")
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}
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}
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}
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var flMemory int64
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if *flMemoryString != "" {
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parsedMemory, err := units.RAMInBytes(*flMemoryString)
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if err != nil {
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return nil, nil, cmd, err
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}
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flMemory = parsedMemory
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}
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var binds []string
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// add any bind targets to the list of container volumes
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for bind := range flVolumes.GetMap() {
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if arr := strings.Split(bind, ":"); len(arr) > 1 {
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if arr[1] == "/" {
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return nil, nil, cmd, fmt.Errorf("Invalid bind mount: destination can't be '/'")
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}
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// after creating the bind mount we want to delete it from the flVolumes values because
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// we do not want bind mounts being committed to image configs
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binds = append(binds, bind)
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flVolumes.Delete(bind)
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} else if bind == "/" {
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return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'")
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}
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}
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var (
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parsedArgs = cmd.Args()
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runCmd []string
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entrypoint []string
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image string
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)
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if len(parsedArgs) >= 1 {
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image = cmd.Arg(0)
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}
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if len(parsedArgs) > 1 {
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runCmd = parsedArgs[1:]
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}
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if *flEntrypoint != "" {
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entrypoint = []string{*flEntrypoint}
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}
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lxcConf, err := parseKeyValueOpts(flLxcOpts)
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if err != nil {
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return nil, nil, cmd, err
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}
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var (
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domainname string
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hostname = *flHostname
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parts = strings.SplitN(hostname, ".", 2)
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)
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if len(parts) > 1 {
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hostname = parts[0]
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domainname = parts[1]
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}
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ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
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if err != nil {
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return nil, nil, cmd, err
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}
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// Merge in exposed ports to the map of published ports
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for _, e := range flExpose.GetAll() {
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if strings.Contains(e, ":") {
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return nil, nil, cmd, fmt.Errorf("Invalid port format for --expose: %s", e)
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}
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p := nat.NewPort(nat.SplitProtoPort(e))
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if _, exists := ports[p]; !exists {
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ports[p] = struct{}{}
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}
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}
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// parse device mappings
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deviceMappings := []DeviceMapping{}
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for _, device := range flDevices.GetAll() {
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deviceMapping, err := ParseDevice(device)
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if err != nil {
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return nil, nil, cmd, err
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}
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deviceMappings = append(deviceMappings, deviceMapping)
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}
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// collect all the environment variables for the container
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envVariables := []string{}
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for _, ef := range flEnvFile.GetAll() {
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parsedVars, err := opts.ParseEnvFile(ef)
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if err != nil {
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return nil, nil, cmd, err
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}
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envVariables = append(envVariables, parsedVars...)
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}
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// parse the '-e' and '--env' after, to allow override
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envVariables = append(envVariables, flEnv.GetAll()...)
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// boo, there's no debug output for docker run
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//utils.Debugf("Environment variables for the container: %#v", envVariables)
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netMode, err := parseNetMode(*flNetMode)
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if err != nil {
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return nil, nil, cmd, fmt.Errorf("--net: invalid net mode: %v", err)
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}
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config := &Config{
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Hostname: hostname,
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Domainname: domainname,
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PortSpecs: nil, // Deprecated
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ExposedPorts: ports,
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User: *flUser,
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Tty: *flTty,
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NetworkDisabled: !*flNetwork,
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OpenStdin: *flStdin,
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Memory: flMemory,
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CpuShares: *flCpuShares,
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Cpuset: *flCpuset,
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AttachStdin: flAttach.Get("stdin"),
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AttachStdout: flAttach.Get("stdout"),
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AttachStderr: flAttach.Get("stderr"),
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Env: envVariables,
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Cmd: runCmd,
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Image: image,
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Volumes: flVolumes.GetMap(),
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Entrypoint: entrypoint,
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WorkingDir: *flWorkingDir,
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}
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hostConfig := &HostConfig{
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Binds: binds,
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ContainerIDFile: *flContainerIDFile,
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LxcConf: lxcConf,
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Privileged: *flPrivileged,
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PortBindings: portBindings,
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Links: flLinks.GetAll(),
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PublishAllPorts: *flPublishAll,
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Dns: flDns.GetAll(),
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DnsSearch: flDnsSearch.GetAll(),
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VolumesFrom: flVolumesFrom.GetAll(),
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NetworkMode: netMode,
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Devices: deviceMappings,
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CapAdd: flCapAdd.GetAll(),
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CapDrop: flCapDrop.GetAll(),
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}
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if sysInfo != nil && flMemory > 0 && !sysInfo.SwapLimit {
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//fmt.Fprintf(stdout, "WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
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config.MemorySwap = -1
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}
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// When allocating stdin in attached mode, close stdin at client disconnect
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if config.OpenStdin && config.AttachStdin {
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config.StdinOnce = true
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}
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return config, hostConfig, cmd, nil
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}
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// options will come in the format of name.key=value or name.option
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func parseDriverOpts(opts opts.ListOpts) (map[string][]string, error) {
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out := make(map[string][]string, len(opts.GetAll()))
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for _, o := range opts.GetAll() {
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parts := strings.SplitN(o, ".", 2)
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if len(parts) < 2 {
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return nil, fmt.Errorf("invalid opt format %s", o)
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} else if strings.TrimSpace(parts[0]) == "" {
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return nil, fmt.Errorf("key cannot be empty %s", o)
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}
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values, exists := out[parts[0]]
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if !exists {
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values = []string{}
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}
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out[parts[0]] = append(values, parts[1])
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}
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return out, nil
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}
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func parseKeyValueOpts(opts opts.ListOpts) ([]utils.KeyValuePair, error) {
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out := make([]utils.KeyValuePair, opts.Len())
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for i, o := range opts.GetAll() {
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k, v, err := utils.ParseKeyValueOpt(o)
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if err != nil {
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return nil, err
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}
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out[i] = utils.KeyValuePair{Key: k, Value: v}
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}
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return out, nil
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}
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func parseNetMode(netMode string) (NetworkMode, error) {
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parts := strings.Split(netMode, ":")
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switch mode := parts[0]; mode {
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case "bridge", "none", "host":
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case "container":
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if len(parts) < 2 || parts[1] == "" {
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return "", fmt.Errorf("invalid container format container:<name|id>")
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}
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default:
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return "", fmt.Errorf("invalid --net: %s", netMode)
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}
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return NetworkMode(netMode), nil
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}
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func ParseDevice(device string) (DeviceMapping, error) {
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src := ""
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dst := ""
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permissions := "rwm"
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arr := strings.Split(device, ":")
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switch len(arr) {
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case 3:
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permissions = arr[2]
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fallthrough
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case 2:
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dst = arr[1]
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fallthrough
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case 1:
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src = arr[0]
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default:
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return DeviceMapping{}, fmt.Errorf("Invalid device specification: %s", device)
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}
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if dst == "" {
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dst = src
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}
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deviceMapping := DeviceMapping{
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PathOnHost: src,
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PathInContainer: dst,
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CgroupPermissions: permissions,
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}
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return deviceMapping, nil
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}
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