mirror of
https://github.com/moby/moby.git
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515 lines
20 KiB
Go
515 lines
20 KiB
Go
package runconfig
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import (
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"fmt"
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"strconv"
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"strings"
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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/nat"
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"github.com/docker/docker/pkg/parsers"
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"github.com/docker/docker/pkg/signal"
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"github.com/docker/docker/pkg/stringutils"
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"github.com/docker/docker/pkg/units"
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"github.com/docker/docker/volume"
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)
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var (
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// ErrConflictContainerNetworkAndLinks conflict between --net=container and links
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ErrConflictContainerNetworkAndLinks = fmt.Errorf("Conflicting options: --net=container can't be used with links. This would result in undefined behavior")
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// ErrConflictUserDefinedNetworkAndLinks conflict between --net=<NETWORK> and links
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ErrConflictUserDefinedNetworkAndLinks = fmt.Errorf("Conflicting options: --net=<NETWORK> can't be used with links. This would result in undefined behavior")
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// ErrConflictSharedNetwork conflict between private and other networks
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ErrConflictSharedNetwork = fmt.Errorf("Container sharing network namespace with another container or host cannot be connected to any other network")
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// ErrConflictHostNetwork conflict from being disconnected from host network or connected to host network.
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ErrConflictHostNetwork = fmt.Errorf("Container cannot be disconnected from host network or connected to host network")
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// ErrConflictNoNetwork conflict between private and other networks
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ErrConflictNoNetwork = fmt.Errorf("Container cannot be connected to multiple networks with one of the networks in --none mode")
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// ErrConflictNetworkAndDNS conflict between --dns and the network mode
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ErrConflictNetworkAndDNS = fmt.Errorf("Conflicting options: --dns and the network mode (--net)")
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// ErrConflictNetworkHostname conflict between the hostname and the network mode
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ErrConflictNetworkHostname = fmt.Errorf("Conflicting options: -h and the network mode (--net)")
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// ErrConflictHostNetworkAndLinks conflict between --net=host and links
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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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// ErrConflictContainerNetworkAndMac conflict between the mac address and the network mode
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ErrConflictContainerNetworkAndMac = fmt.Errorf("Conflicting options: --mac-address and the network mode (--net)")
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// ErrConflictNetworkHosts conflict between add-host and the network mode
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ErrConflictNetworkHosts = fmt.Errorf("Conflicting options: --add-host and the network mode (--net)")
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// ErrConflictNetworkPublishPorts conflict between the pulbish options and the network mode
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ErrConflictNetworkPublishPorts = fmt.Errorf("Conflicting options: -p, -P, --publish-all, --publish and the network mode (--net)")
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// ErrConflictNetworkExposePorts conflict between the expose option and the network mode
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ErrConflictNetworkExposePorts = fmt.Errorf("Conflicting options: --expose and the network mode (--expose)")
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)
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// Parse parses the specified args for the specified command and generates a Config,
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// a HostConfig and returns them with the specified command.
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// If the specified args are not valid, it will return an error.
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func Parse(cmd *flag.FlagSet, args []string) (*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(nil)
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flBlkioWeightDevice = opts.NewWeightdeviceOpt(opts.ValidateWeightDevice)
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flLinks = opts.NewListOpts(opts.ValidateLink)
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flEnv = opts.NewListOpts(opts.ValidateEnv)
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flLabels = opts.NewListOpts(opts.ValidateEnv)
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flDevices = opts.NewListOpts(opts.ValidateDevice)
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flUlimits = opts.NewUlimitOpt(nil)
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flPublish = opts.NewListOpts(nil)
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flExpose = opts.NewListOpts(nil)
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flDNS = opts.NewListOpts(opts.ValidateIPAddress)
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flDNSSearch = opts.NewListOpts(opts.ValidateDNSSearch)
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flDNSOptions = opts.NewListOpts(nil)
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flExtraHosts = opts.NewListOpts(opts.ValidateExtraHost)
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flVolumesFrom = opts.NewListOpts(nil)
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flEnvFile = opts.NewListOpts(nil)
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flCapAdd = opts.NewListOpts(nil)
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flCapDrop = opts.NewListOpts(nil)
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flGroupAdd = opts.NewListOpts(nil)
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flSecurityOpt = opts.NewListOpts(nil)
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flLabelsFile = opts.NewListOpts(nil)
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flLoggingOpts = opts.NewListOpts(nil)
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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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flPidMode = cmd.String([]string{"-pid"}, "", "PID namespace to use")
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flUTSMode = cmd.String([]string{"-uts"}, "", "UTS namespace to use")
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flPublishAll = cmd.Bool([]string{"P", "-publish-all"}, false, "Publish all exposed ports to random ports")
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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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flOomKillDisable = cmd.Bool([]string{"-oom-kill-disable"}, false, "Disable OOM Killer")
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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")
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flMemoryReservation = cmd.String([]string{"-memory-reservation"}, "", "Memory soft limit")
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flMemorySwap = cmd.String([]string{"-memory-swap"}, "", "Total memory (memory + swap), '-1' to disable swap")
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flKernelMemory = cmd.String([]string{"-kernel-memory"}, "", "Kernel memory limit")
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flUser = cmd.String([]string{"u", "-user"}, "", "Username or UID (format: <name|uid>[:<group|gid>])")
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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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flCPUPeriod = cmd.Int64([]string{"-cpu-period"}, 0, "Limit CPU CFS (Completely Fair Scheduler) period")
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flCPUQuota = cmd.Int64([]string{"-cpu-quota"}, 0, "Limit CPU CFS (Completely Fair Scheduler) quota")
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flCpusetCpus = cmd.String([]string{"#-cpuset", "-cpuset-cpus"}, "", "CPUs in which to allow execution (0-3, 0,1)")
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flCpusetMems = cmd.String([]string{"-cpuset-mems"}, "", "MEMs in which to allow execution (0-3, 0,1)")
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flBlkioWeight = cmd.Uint16([]string{"-blkio-weight"}, 0, "Block IO (relative weight), between 10 and 1000")
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flSwappiness = cmd.Int64([]string{"-memory-swappiness"}, -1, "Tuning container memory swappiness (0 to 100)")
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flNetMode = cmd.String([]string{"-net"}, "default", "Set the Network for the container")
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flMacAddress = cmd.String([]string{"-mac-address"}, "", "Container MAC address (e.g. 92:d0:c6:0a:29:33)")
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flIpcMode = cmd.String([]string{"-ipc"}, "", "IPC namespace to use")
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flRestartPolicy = cmd.String([]string{"-restart"}, "no", "Restart policy to apply when a container exits")
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flReadonlyRootfs = cmd.Bool([]string{"-read-only"}, false, "Mount the container's root filesystem as read only")
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flLoggingDriver = cmd.String([]string{"-log-driver"}, "", "Logging driver for container")
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flCgroupParent = cmd.String([]string{"-cgroup-parent"}, "", "Optional parent cgroup for the container")
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flVolumeDriver = cmd.String([]string{"-volume-driver"}, "", "Optional volume driver for the container")
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flStopSignal = cmd.String([]string{"-stop-signal"}, signal.DefaultStopSignal, fmt.Sprintf("Signal to stop a container, %v by default", signal.DefaultStopSignal))
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flIsolation = cmd.String([]string{"-isolation"}, "", "Container isolation level")
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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(&flBlkioWeightDevice, []string{"-blkio-weight-device"}, "Block IO weight (relative device weight)")
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cmd.Var(&flVolumes, []string{"v", "-volume"}, "Bind mount a volume")
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cmd.Var(&flLinks, []string{"#link", "-link"}, "Add link to another container")
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cmd.Var(&flDevices, []string{"-device"}, "Add a host device to the container")
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cmd.Var(&flLabels, []string{"l", "-label"}, "Set meta data on a container")
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cmd.Var(&flLabelsFile, []string{"-label-file"}, "Read in a line delimited file of labels")
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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 file of environment variables")
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cmd.Var(&flPublish, []string{"p", "-publish"}, "Publish a container's port(s) to the host")
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cmd.Var(&flExpose, []string{"#expose", "-expose"}, "Expose a port or a range of ports")
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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(&flDNSOptions, []string{"-dns-opt"}, "Set DNS options")
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cmd.Var(&flExtraHosts, []string{"-add-host"}, "Add a custom host-to-IP mapping (host:ip)")
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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(&flCapAdd, []string{"-cap-add"}, "Add Linux capabilities")
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cmd.Var(&flCapDrop, []string{"-cap-drop"}, "Drop Linux capabilities")
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cmd.Var(&flGroupAdd, []string{"-group-add"}, "Add additional groups to join")
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cmd.Var(&flSecurityOpt, []string{"-security-opt"}, "Security Options")
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cmd.Var(flUlimits, []string{"-ulimit"}, "Ulimit options")
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cmd.Var(&flLoggingOpts, []string{"-log-opt"}, "Log driver options")
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cmd.Require(flag.Min, 1)
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if err := cmd.ParseFlags(args, true); err != nil {
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return nil, nil, cmd, err
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}
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var (
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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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)
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// Validate the input mac address
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if *flMacAddress != "" {
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if _, err := opts.ValidateMACAddress(*flMacAddress); err != nil {
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return nil, nil, cmd, fmt.Errorf("%s is not a valid mac address", *flMacAddress)
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}
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}
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if *flStdin {
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attachStdin = true
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}
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// If -a is not set attach to the output stdio
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if flAttach.Len() == 0 {
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attachStdout = true
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attachStderr = true
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}
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var err error
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var flMemory int64
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if *flMemoryString != "" {
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flMemory, 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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}
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var MemoryReservation int64
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if *flMemoryReservation != "" {
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MemoryReservation, err = units.RAMInBytes(*flMemoryReservation)
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if err != nil {
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return nil, nil, cmd, err
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}
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}
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var memorySwap int64
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if *flMemorySwap != "" {
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if *flMemorySwap == "-1" {
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memorySwap = -1
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} else {
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memorySwap, err = units.RAMInBytes(*flMemorySwap)
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if err != nil {
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return nil, nil, cmd, err
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}
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}
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}
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var KernelMemory int64
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if *flKernelMemory != "" {
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KernelMemory, err = units.RAMInBytes(*flKernelMemory)
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if err != nil {
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return nil, nil, cmd, err
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}
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}
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swappiness := *flSwappiness
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if swappiness != -1 && (swappiness < 0 || swappiness > 100) {
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return nil, nil, cmd, fmt.Errorf("Invalid value: %d. Valid memory swappiness range is 0-100", swappiness)
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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 := volume.SplitN(bind, 2); len(arr) > 1 {
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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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}
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}
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var (
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parsedArgs = cmd.Args()
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runCmd *stringutils.StrSlice
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entrypoint *stringutils.StrSlice
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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 = stringutils.NewStrSlice(parsedArgs[1:]...)
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}
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if *flEntrypoint != "" {
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entrypoint = stringutils.NewStrSlice(*flEntrypoint)
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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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//support two formats for expose, original format <portnum>/[<proto>] or <startport-endport>/[<proto>]
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proto, port := nat.SplitProtoPort(e)
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//parse the start and end port and create a sequence of ports to expose
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//if expose a port, the start and end port are the same
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start, end, err := parsers.ParsePortRange(port)
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if err != nil {
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return nil, nil, cmd, fmt.Errorf("Invalid range format for --expose: %s, error: %s", e, err)
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}
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for i := start; i <= end; i++ {
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p, err := nat.NewPort(proto, strconv.FormatUint(i, 10))
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if err != nil {
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return nil, nil, cmd, err
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}
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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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}
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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, err := readKVStrings(flEnvFile.GetAll(), flEnv.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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// collect all the labels for the container
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labels, err := readKVStrings(flLabelsFile.GetAll(), flLabels.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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ipcMode := IpcMode(*flIpcMode)
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if !ipcMode.Valid() {
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return nil, nil, cmd, fmt.Errorf("--ipc: invalid IPC mode")
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}
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pidMode := PidMode(*flPidMode)
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if !pidMode.Valid() {
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return nil, nil, cmd, fmt.Errorf("--pid: invalid PID mode")
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}
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utsMode := UTSMode(*flUTSMode)
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if !utsMode.Valid() {
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return nil, nil, cmd, fmt.Errorf("--uts: invalid UTS mode")
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}
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restartPolicy, err := ParseRestartPolicy(*flRestartPolicy)
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if err != nil {
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return nil, nil, cmd, err
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}
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loggingOpts, err := parseLoggingOpts(*flLoggingDriver, flLoggingOpts.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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config := &Config{
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Hostname: hostname,
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Domainname: domainname,
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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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AttachStdin: attachStdin,
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AttachStdout: attachStdout,
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AttachStderr: attachStderr,
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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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MacAddress: *flMacAddress,
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Entrypoint: entrypoint,
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WorkingDir: *flWorkingDir,
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Labels: ConvertKVStringsToMap(labels),
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StopSignal: *flStopSignal,
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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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Memory: flMemory,
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MemoryReservation: MemoryReservation,
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MemorySwap: memorySwap,
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KernelMemory: KernelMemory,
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CPUShares: *flCPUShares,
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CPUPeriod: *flCPUPeriod,
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CpusetCpus: *flCpusetCpus,
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CpusetMems: *flCpusetMems,
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CPUQuota: *flCPUQuota,
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BlkioWeight: *flBlkioWeight,
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BlkioWeightDevice: flBlkioWeightDevice.GetList(),
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OomKillDisable: *flOomKillDisable,
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MemorySwappiness: flSwappiness,
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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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// Make sure the dns fields are never nil.
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// New containers don't ever have those fields nil,
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// but pre created containers can still have those nil values.
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// See https://github.com/docker/docker/pull/17779
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// for a more detailed explanation on why we don't want that.
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DNS: flDNS.GetAllOrEmpty(),
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DNSSearch: flDNSSearch.GetAllOrEmpty(),
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DNSOptions: flDNSOptions.GetAllOrEmpty(),
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ExtraHosts: flExtraHosts.GetAll(),
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VolumesFrom: flVolumesFrom.GetAll(),
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NetworkMode: NetworkMode(*flNetMode),
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IpcMode: ipcMode,
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PidMode: pidMode,
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UTSMode: utsMode,
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Devices: deviceMappings,
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CapAdd: stringutils.NewStrSlice(flCapAdd.GetAll()...),
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CapDrop: stringutils.NewStrSlice(flCapDrop.GetAll()...),
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GroupAdd: flGroupAdd.GetAll(),
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RestartPolicy: restartPolicy,
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SecurityOpt: flSecurityOpt.GetAll(),
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ReadonlyRootfs: *flReadonlyRootfs,
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Ulimits: flUlimits.GetList(),
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LogConfig: LogConfig{Type: *flLoggingDriver, Config: loggingOpts},
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CgroupParent: *flCgroupParent,
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VolumeDriver: *flVolumeDriver,
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Isolation: IsolationLevel(*flIsolation),
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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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// reads a file of line terminated key=value pairs and override that with override parameter
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func readKVStrings(files []string, override []string) ([]string, error) {
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envVariables := []string{}
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for _, ef := range files {
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parsedVars, err := opts.ParseEnvFile(ef)
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if err != nil {
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return nil, 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, override...)
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return envVariables, nil
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}
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// ConvertKVStringsToMap converts ["key=value"] to {"key":"value"}
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func ConvertKVStringsToMap(values []string) map[string]string {
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result := make(map[string]string, len(values))
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for _, value := range values {
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kv := strings.SplitN(value, "=", 2)
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if len(kv) == 1 {
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result[kv[0]] = ""
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} else {
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result[kv[0]] = kv[1]
|
|
}
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
func parseLoggingOpts(loggingDriver string, loggingOpts []string) (map[string]string, error) {
|
|
loggingOptsMap := ConvertKVStringsToMap(loggingOpts)
|
|
if loggingDriver == "none" && len(loggingOpts) > 0 {
|
|
return map[string]string{}, fmt.Errorf("Invalid logging opts for driver %s", loggingDriver)
|
|
}
|
|
return loggingOptsMap, nil
|
|
}
|
|
|
|
// ParseRestartPolicy returns the parsed policy or an error indicating what is incorrect
|
|
func ParseRestartPolicy(policy string) (RestartPolicy, error) {
|
|
p := RestartPolicy{}
|
|
|
|
if policy == "" {
|
|
return p, nil
|
|
}
|
|
|
|
var (
|
|
parts = strings.Split(policy, ":")
|
|
name = parts[0]
|
|
)
|
|
|
|
p.Name = name
|
|
switch name {
|
|
case "always", "unless-stopped":
|
|
if len(parts) > 1 {
|
|
return p, fmt.Errorf("maximum restart count not valid with restart policy of \"%s\"", name)
|
|
}
|
|
case "no":
|
|
// do nothing
|
|
case "on-failure":
|
|
if len(parts) > 2 {
|
|
return p, fmt.Errorf("restart count format is not valid, usage: 'on-failure:N' or 'on-failure'")
|
|
}
|
|
if len(parts) == 2 {
|
|
count, err := strconv.Atoi(parts[1])
|
|
if err != nil {
|
|
return p, err
|
|
}
|
|
|
|
p.MaximumRetryCount = count
|
|
}
|
|
default:
|
|
return p, fmt.Errorf("invalid restart policy %s", name)
|
|
}
|
|
|
|
return p, nil
|
|
}
|
|
|
|
func parseKeyValueOpts(opts opts.ListOpts) ([]KeyValuePair, error) {
|
|
out := make([]KeyValuePair, opts.Len())
|
|
for i, o := range opts.GetAll() {
|
|
k, v, err := parsers.ParseKeyValueOpt(o)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
out[i] = KeyValuePair{Key: k, Value: v}
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
// ParseDevice parses a device mapping string to a DeviceMapping struct
|
|
func ParseDevice(device string) (DeviceMapping, error) {
|
|
src := ""
|
|
dst := ""
|
|
permissions := "rwm"
|
|
arr := strings.Split(device, ":")
|
|
switch len(arr) {
|
|
case 3:
|
|
permissions = arr[2]
|
|
fallthrough
|
|
case 2:
|
|
if opts.ValidDeviceMode(arr[1]) {
|
|
permissions = arr[1]
|
|
} else {
|
|
dst = arr[1]
|
|
}
|
|
fallthrough
|
|
case 1:
|
|
src = arr[0]
|
|
default:
|
|
return DeviceMapping{}, fmt.Errorf("Invalid device specification: %s", device)
|
|
}
|
|
|
|
if dst == "" {
|
|
dst = src
|
|
}
|
|
|
|
deviceMapping := DeviceMapping{
|
|
PathOnHost: src,
|
|
PathInContainer: dst,
|
|
CgroupPermissions: permissions,
|
|
}
|
|
return deviceMapping, nil
|
|
}
|