driver

package
v0.7.1 Latest Latest
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 Go to latest Published: Dec 20, 2017 License: MPL-2.0 Imports: 49 Imported by: 0

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Index

Constants

View Source 
const (
	// NoSuchContainerError is returned by the docker daemon if the container
	// does not exist.
	NoSuchContainerError = "No such container"
)

Variables

View Source 
var (

	// The statistics the Docker driver exposes
	DockerMeasuredMemStats = []string{"RSS", "Cache", "Swap", "Max Usage"}
	DockerMeasuredCpuStats = []string{"Throttled Periods", "Throttled Time", "Percent"}
)
View Source 
var (
	// BuiltinDrivers contains the built in registered drivers
	// which are available for allocation handling
	BuiltinDrivers = map[string]Factory{
		"docker":   NewDockerDriver,
		"exec":     NewExecDriver,
		"raw_exec": NewRawExecDriver,
		"java":     NewJavaDriver,
		"qemu":     NewQemuDriver,
		"rkt":      NewRktDriver,
	}

	// DriverStatsNotImplemented is the error to be returned if a driver doesn't
	// implement stats.
	DriverStatsNotImplemented = errors.New("stats not implemented for driver")
)
View Source 
var HandshakeConfig = plugin.HandshakeConfig{
	ProtocolVersion:  1,
	MagicCookieKey:   "NOMAD_PLUGIN_MAGIC_COOKIE",
	MagicCookieValue: "e4327c2e01eabfd75a8a67adb114fb34a757d57eee7728d857a8cec6e91a7255",
}

Functions

func GetAbsolutePath 

func GetAbsolutePath(bin string) (string, error)

GetAbsolutePath returns the absolute path of the passed binary by resolving it in the path and following symlinks.

func GetDockerCoordinator 

func GetDockerCoordinator(config *dockerCoordinatorConfig) *dockerCoordinator

GetDockerCoordinator returns the shared dockerCoordinator instance

func GetKillTimeout 

func GetKillTimeout(desired, max time.Duration) time.Duration

GetKillTimeout returns the kill timeout to use given the tasks desired kill timeout and the operator configured max kill timeout.

func GetPluginMap 

func GetPluginMap(w io.Writer, logLevel string) map[string]plugin.Plugin

func NewDockerCoordinator 

func NewDockerCoordinator(config *dockerCoordinatorConfig) *dockerCoordinator

NewDockerCoordinator returns a new Docker coordinator

func SetEnvvars 

func SetEnvvars(envBuilder *env.Builder, fsi cstructs.FSIsolation, taskDir *allocdir.TaskDir, conf *config.Config)

SetEnvvars sets path and host env vars depending on the FS isolation used.

Types

type CreatedResources 

type CreatedResources struct {
	Resources map[string][]string
}

CreatedResources is a map of resources (eg downloaded images) created by a driver that must be cleaned up.

func NewCreatedResources 

func NewCreatedResources() *CreatedResources

func (*CreatedResources) Add 

func (r *CreatedResources) Add(k, v string)

Add a new resource if it doesn't already exist.

func (*CreatedResources) Copy 

func (r *CreatedResources) Copy() *CreatedResources

Copy returns a new deep copy of CreatedResrouces.

func (*CreatedResources) Hash 

func (r *CreatedResources) Hash() []byte

func (*CreatedResources) Merge 

func (r *CreatedResources) Merge(o *CreatedResources)

Merge another CreatedResources into this one. If the other CreatedResources is nil this method is a noop.

func (*CreatedResources) Remove 

func (r *CreatedResources) Remove(k, needle string) bool

Remove a resource. Return true if removed, otherwise false.

Removes the entire key if the needle is the last value in the list.

type DockerDevice 

type DockerDevice struct {
	HostPath          string `mapstructure:"host_path"`
	ContainerPath     string `mapstructure:"container_path"`
	CgroupPermissions string `mapstructure:"cgroup_permissions"`
}

type DockerDriver 

type DockerDriver struct {
	DriverContext
	// contains filtered or unexported fields
}

func (*DockerDriver) Abilities 

func (d *DockerDriver) Abilities() DriverAbilities

func (*DockerDriver) Cleanup 

func (d *DockerDriver) Cleanup(_ *ExecContext, res *CreatedResources) error

func (*DockerDriver) FSIsolation 

func (d *DockerDriver) FSIsolation() cstructs.FSIsolation

func (*DockerDriver) Fingerprint 

func (d *DockerDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*DockerDriver) Open 

func (d *DockerDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*DockerDriver) Periodic 

func (d *DockerDriver) Periodic() (bool, time.Duration)

func (*DockerDriver) Prestart 

func (d *DockerDriver) Prestart(ctx *ExecContext, task *structs.Task) (*PrestartResponse, error)

func (*DockerDriver) Start 

func (d *DockerDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

func (*DockerDriver) Validate 

func (d *DockerDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type DockerDriverAuth 

type DockerDriverAuth struct {
	Username      string `mapstructure:"username"`       // username for the registry
	Password      string `mapstructure:"password"`       // password to access the registry
	Email         string `mapstructure:"email"`          // email address of the user who is allowed to access the registry
	ServerAddress string `mapstructure:"server_address"` // server address of the registry
}

type DockerDriverConfig 

type DockerDriverConfig struct {
	ImageName        string              `mapstructure:"image"`              // Container's Image Name
	LoadImage        string              `mapstructure:"load"`               // LoadImage is a path to an image archive file
	Command          string              `mapstructure:"command"`            // The Command to run when the container starts up
	Args             []string            `mapstructure:"args"`               // The arguments to the Command
	IpcMode          string              `mapstructure:"ipc_mode"`           // The IPC mode of the container - host and none
	NetworkMode      string              `mapstructure:"network_mode"`       // The network mode of the container - host, nat and none
	NetworkAliases   []string            `mapstructure:"network_aliases"`    // The network-scoped alias for the container
	IPv4Address      string              `mapstructure:"ipv4_address"`       // The container ipv4 address
	IPv6Address      string              `mapstructure:"ipv6_address"`       // the container ipv6 address
	PidMode          string              `mapstructure:"pid_mode"`           // The PID mode of the container - host and none
	UTSMode          string              `mapstructure:"uts_mode"`           // The UTS mode of the container - host and none
	UsernsMode       string              `mapstructure:"userns_mode"`        // The User namespace mode of the container - host and none
	PortMapRaw       []map[string]string `mapstructure:"port_map"`           //
	PortMap          map[string]int      `mapstructure:"-"`                  // A map of host port labels and the ports exposed on the container
	Privileged       bool                `mapstructure:"privileged"`         // Flag to run the container in privileged mode
	SysctlRaw        []map[string]string `mapstructure:"sysctl"`             //
	Sysctl           map[string]string   `mapstructure:"-"`                  // The sysctl custom configurations
	UlimitRaw        []map[string]string `mapstructure:"ulimit"`             //
	Ulimit           []docker.ULimit     `mapstructure:"-"`                  // The ulimit custom configurations
	DNSServers       []string            `mapstructure:"dns_servers"`        // DNS Server for containers
	DNSSearchDomains []string            `mapstructure:"dns_search_domains"` // DNS Search domains for containers
	DNSOptions       []string            `mapstructure:"dns_options"`        // DNS Options
	ExtraHosts       []string            `mapstructure:"extra_hosts"`        // Add host to /etc/hosts (host:IP)
	Hostname         string              `mapstructure:"hostname"`           // Hostname for containers
	LabelsRaw        []map[string]string `mapstructure:"labels"`             //
	Labels           map[string]string   `mapstructure:"-"`                  // Labels to set when the container starts up
	Auth             []DockerDriverAuth  `mapstructure:"auth"`               // Authentication credentials for a private Docker registry
	AuthSoftFail     bool                `mapstructure:"auth_soft_fail"`     // Soft-fail if auth creds are provided but fail
	TTY              bool                `mapstructure:"tty"`                // Allocate a Pseudo-TTY
	Interactive      bool                `mapstructure:"interactive"`        // Keep STDIN open even if not attached
	ShmSize          int64               `mapstructure:"shm_size"`           // Size of /dev/shm of the container in bytes
	WorkDir          string              `mapstructure:"work_dir"`           // Working directory inside the container
	Logging          []DockerLoggingOpts `mapstructure:"logging"`            // Logging options for syslog server
	Volumes          []string            `mapstructure:"volumes"`            // Host-Volumes to mount in, syntax: /path/to/host/directory:/destination/path/in/container
	Mounts           []DockerMount       `mapstructure:"mounts"`             // Docker volumes to mount
	VolumeDriver     string              `mapstructure:"volume_driver"`      // Docker volume driver used for the container's volumes
	ForcePull        bool                `mapstructure:"force_pull"`         // Always force pull before running image, useful if your tags are mutable
	MacAddress       string              `mapstructure:"mac_address"`        // Pin mac address to container
	SecurityOpt      []string            `mapstructure:"security_opt"`       // Flags to pass directly to security-opt
	Devices          []DockerDevice      `mapstructure:"devices"`            // To allow mounting USB or other serial control devices
}

DockerDriverConfig defines the user specified config block in a jobspec

func NewDockerDriverConfig 

func NewDockerDriverConfig(task *structs.Task, env *env.TaskEnv) (*DockerDriverConfig, error)

NewDockerDriverConfig returns a docker driver config by parsing the HCL config

func (*DockerDriverConfig) Validate 

func (c *DockerDriverConfig) Validate() error

Validate validates a docker driver config

type DockerHandle 

type DockerHandle struct {
	Image   string
	ImageID string
	// contains filtered or unexported fields
}

func (*DockerHandle) ContainerID 

func (h *DockerHandle) ContainerID() string

func (*DockerHandle) Exec 

func (h *DockerHandle) Exec(ctx context.Context, cmd string, args []string) ([]byte, int, error)

func (*DockerHandle) ID 

func (h *DockerHandle) ID() string

func (*DockerHandle) Kill 

func (h *DockerHandle) Kill() error

Kill is used to terminate the task. This uses `docker stop -t killTimeout`

func (*DockerHandle) Signal 

func (h *DockerHandle) Signal(s os.Signal) error

func (*DockerHandle) Stats 

func (h *DockerHandle) Stats() (*cstructs.TaskResourceUsage, error)

func (*DockerHandle) Update 

func (h *DockerHandle) Update(task *structs.Task) error

func (*DockerHandle) WaitCh 

func (h *DockerHandle) WaitCh() chan *dstructs.WaitResult

type DockerImageClient 

type DockerImageClient interface {
	PullImage(opts docker.PullImageOptions, auth docker.AuthConfiguration) error
	InspectImage(id string) (*docker.Image, error)
	RemoveImage(id string) error
}

DockerImageClient provides the methods required to do CRUD operations on the Docker images

type DockerLoggingOpts 

type DockerLoggingOpts struct {
	Type      string              `mapstructure:"type"`
	ConfigRaw []map[string]string `mapstructure:"config"`
	Config    map[string]string   `mapstructure:"-"`
}

type DockerMount 

type DockerMount struct {
	Target        string                 `mapstructure:"target"`
	Source        string                 `mapstructure:"source"`
	ReadOnly      bool                   `mapstructure:"readonly"`
	VolumeOptions []*DockerVolumeOptions `mapstructure:"volume_options"`
}

type DockerVolumeDriverConfig 

type DockerVolumeDriverConfig struct {
	Name    string              `mapstructure:"name"`
	Options []map[string]string `mapstructure:"options"`
}

VolumeDriverConfig holds a map of volume driver specific options

type DockerVolumeOptions 

type DockerVolumeOptions struct {
	NoCopy       bool                       `mapstructure:"no_copy"`
	Labels       []map[string]string        `mapstructure:"labels"`
	DriverConfig []DockerVolumeDriverConfig `mapstructure:"driver_config"`
}

type Driver 

type Driver interface {
	// Drivers must support the fingerprint interface for detection
	fingerprint.Fingerprint

	// Prestart prepares the task environment and performs expensive
	// intialization steps like downloading images.
	//
	// CreatedResources may be non-nil even when an error occurs.
	Prestart(*ExecContext, *structs.Task) (*PrestartResponse, error)

	// Start is used to begin task execution. If error is nil,
	// StartResponse.Handle will be the handle to the task's executor.
	// StartResponse.Network may be nil if the task doesn't configure a
	// network.
	Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

	// Open is used to re-open a handle to a task
	Open(ctx *ExecContext, handleID string) (DriverHandle, error)

	// Cleanup is called to remove resources which were created for a task
	// and no longer needed. Cleanup is not called if CreatedResources is
	// nil.
	//
	// If Cleanup returns a recoverable error it may be retried. On retry
	// it will be passed the same CreatedResources, so all successfully
	// cleaned up resources should be removed or handled idempotently.
	Cleanup(*ExecContext, *CreatedResources) error

	// Drivers must validate their configuration
	Validate(map[string]interface{}) error

	// Abilities returns the abilities of the driver
	Abilities() DriverAbilities

	// FSIsolation returns the method of filesystem isolation used
	FSIsolation() cstructs.FSIsolation
}

Driver is used for execution of tasks. This allows Nomad to support many pluggable implementations of task drivers. Examples could include LXC, Docker, Qemu, etc.

func NewDockerDriver 

func NewDockerDriver(ctx *DriverContext) Driver

func NewDriver 

func NewDriver(name string, ctx *DriverContext) (Driver, error)

NewDriver is used to instantiate and return a new driver given the name and a logger

func NewExecDriver 

func NewExecDriver(ctx *DriverContext) Driver

NewExecDriver is used to create a new exec driver

func NewJavaDriver 

func NewJavaDriver(ctx *DriverContext) Driver

NewJavaDriver is used to create a new exec driver

func NewQemuDriver 

func NewQemuDriver(ctx *DriverContext) Driver

NewQemuDriver is used to create a new exec driver

func NewRawExecDriver 

func NewRawExecDriver(ctx *DriverContext) Driver

NewRawExecDriver is used to create a new raw exec driver

func NewRktDriver 

func NewRktDriver(ctx *DriverContext) Driver

NewRktDriver is used to create a new rkt driver

type DriverAbilities 

type DriverAbilities struct {
	// SendSignals marks the driver as being able to send signals
	SendSignals bool

	// Exec marks the driver as being able to execute arbitrary commands
	// such as health checks. Used by the ScriptExecutor interface.
	Exec bool
}

DriverAbilities marks the abilities the driver has.

type DriverContext 

type DriverContext struct {
	// contains filtered or unexported fields
}

DriverContext is a means to inject dependencies such as loggers, configs, and node attributes into a Driver without having to change the Driver interface each time we do it. Used in conjection with Factory, above.

func NewDriverContext 

func NewDriverContext(taskName, allocID string, config *config.Config, node *structs.Node,
	logger *log.Logger, eventEmitter LogEventFn) *DriverContext

NewDriverContext initializes a new DriverContext with the specified fields. This enables other packages to create DriverContexts but keeps the fields private to the driver. If we want to change this later we can gorename all of the fields in DriverContext.

func NewEmptyDriverContext 

func NewEmptyDriverContext() *DriverContext

NewEmptyDriverContext returns a DriverContext with all fields set to their zero value.

type DriverHandle 

type DriverHandle interface {
	// Returns an opaque handle that can be used to re-open the handle
	ID() string

	// WaitCh is used to return a channel used wait for task completion
	WaitCh() chan *dstructs.WaitResult

	// Update is used to update the task if possible and update task related
	// configurations.
	Update(task *structs.Task) error

	// Kill is used to stop the task
	Kill() error

	// Stats returns aggregated stats of the driver
	Stats() (*cstructs.TaskResourceUsage, error)

	// Signal is used to send a signal to the task
	Signal(s os.Signal) error

	// ScriptExecutor is an interface used to execute commands such as
	// health check scripts in the a DriverHandle's context.
	ScriptExecutor
}

DriverHandle is an opaque handle into a driver used for task manipulation

type ExecCmdArgs 

type ExecCmdArgs struct {
	Deadline time.Time
	Name     string
	Args     []string
}

type ExecCmdReturn 

type ExecCmdReturn struct {
	Output []byte
	Code   int
}

type ExecContext 

type ExecContext struct {
	// TaskDir contains information about the task directory structure.
	TaskDir *allocdir.TaskDir

	// TaskEnv contains the task's environment variables.
	TaskEnv *env.TaskEnv
}

ExecContext is a task's execution context

func NewExecContext 

func NewExecContext(td *allocdir.TaskDir, te *env.TaskEnv) *ExecContext

NewExecContext is used to create a new execution context

type ExecDriver 

type ExecDriver struct {
	DriverContext
	// contains filtered or unexported fields
}

ExecDriver fork/execs tasks using as many of the underlying OS's isolation features.

func (*ExecDriver) Abilities 

func (d *ExecDriver) Abilities() DriverAbilities

func (*ExecDriver) Cleanup 

func (d *ExecDriver) Cleanup(*ExecContext, *CreatedResources) error

func (*ExecDriver) FSIsolation 

func (d *ExecDriver) FSIsolation() cstructs.FSIsolation

func (*ExecDriver) Fingerprint 

func (d *ExecDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*ExecDriver) Open 

func (d *ExecDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*ExecDriver) Periodic 

func (d *ExecDriver) Periodic() (bool, time.Duration)

func (*ExecDriver) Prestart 

func (d *ExecDriver) Prestart(*ExecContext, *structs.Task) (*PrestartResponse, error)

func (*ExecDriver) Start 

func (d *ExecDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

func (*ExecDriver) Validate 

func (d *ExecDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type ExecDriverConfig 

type ExecDriverConfig struct {
	Command string   `mapstructure:"command"`
	Args    []string `mapstructure:"args"`
}

type ExecutorPlugin 

type ExecutorPlugin struct {
	Impl *ExecutorRPCServer
	// contains filtered or unexported fields
}

func (*ExecutorPlugin) Client 

func (p *ExecutorPlugin) Client(b *plugin.MuxBroker, c *rpc.Client) (interface{}, error)

func (*ExecutorPlugin) Server 

func (p *ExecutorPlugin) Server(*plugin.MuxBroker) (interface{}, error)

type ExecutorRPC 

type ExecutorRPC struct {
	// contains filtered or unexported fields
}

func (*ExecutorRPC) DeregisterServices 

func (e *ExecutorRPC) DeregisterServices() error

func (*ExecutorRPC) Exec 

func (e *ExecutorRPC) Exec(deadline time.Time, name string, args []string) ([]byte, int, error)

func (*ExecutorRPC) Exit 

func (e *ExecutorRPC) Exit() error

func (*ExecutorRPC) LaunchCmd 

func (e *ExecutorRPC) LaunchCmd(cmd *executor.ExecCommand) (*executor.ProcessState, error)

func (*ExecutorRPC) LaunchSyslogServer 

func (e *ExecutorRPC) LaunchSyslogServer() (*executor.SyslogServerState, error)

func (*ExecutorRPC) SetContext 

func (e *ExecutorRPC) SetContext(ctx *executor.ExecutorContext) error

func (*ExecutorRPC) ShutDown 

func (e *ExecutorRPC) ShutDown() error

func (*ExecutorRPC) Signal 

func (e *ExecutorRPC) Signal(s os.Signal) error

func (*ExecutorRPC) Stats 

func (e *ExecutorRPC) Stats() (*cstructs.TaskResourceUsage, error)

func (*ExecutorRPC) UpdateLogConfig 

func (e *ExecutorRPC) UpdateLogConfig(logConfig *structs.LogConfig) error

func (*ExecutorRPC) UpdateTask 

func (e *ExecutorRPC) UpdateTask(task *structs.Task) error

func (*ExecutorRPC) Version 

func (e *ExecutorRPC) Version() (*executor.ExecutorVersion, error)

func (*ExecutorRPC) Wait 

func (e *ExecutorRPC) Wait() (*executor.ProcessState, error)

type ExecutorRPCServer 

type ExecutorRPCServer struct {
	Impl executor.Executor
	// contains filtered or unexported fields
}

func (*ExecutorRPCServer) DeregisterServices 

func (e *ExecutorRPCServer) DeregisterServices(args interface{}, resp *interface{}) error

func (*ExecutorRPCServer) Exec 

func (e *ExecutorRPCServer) Exec(args ExecCmdArgs, result *ExecCmdReturn) error

func (*ExecutorRPCServer) Exit 

func (e *ExecutorRPCServer) Exit(args interface{}, resp *interface{}) error

func (*ExecutorRPCServer) LaunchCmd 

func (e *ExecutorRPCServer) LaunchCmd(args LaunchCmdArgs, ps *executor.ProcessState) error

func (*ExecutorRPCServer) LaunchSyslogServer 

func (e *ExecutorRPCServer) LaunchSyslogServer(args interface{}, ss *executor.SyslogServerState) error

func (*ExecutorRPCServer) SetContext 

func (e *ExecutorRPCServer) SetContext(args *executor.ExecutorContext, resp *interface{}) error

func (*ExecutorRPCServer) ShutDown 

func (e *ExecutorRPCServer) ShutDown(args interface{}, resp *interface{}) error

func (*ExecutorRPCServer) Signal 

func (e *ExecutorRPCServer) Signal(args os.Signal, resp *interface{}) error

func (*ExecutorRPCServer) Stats 

func (e *ExecutorRPCServer) Stats(args interface{}, resourceUsage *cstructs.TaskResourceUsage) error

func (*ExecutorRPCServer) UpdateLogConfig 

func (e *ExecutorRPCServer) UpdateLogConfig(args *structs.LogConfig, resp *interface{}) error

func (*ExecutorRPCServer) UpdateTask 

func (e *ExecutorRPCServer) UpdateTask(args *structs.Task, resp *interface{}) error

func (*ExecutorRPCServer) Version 

func (e *ExecutorRPCServer) Version(args interface{}, version *executor.ExecutorVersion) error

func (*ExecutorRPCServer) Wait 

func (e *ExecutorRPCServer) Wait(args interface{}, ps *executor.ProcessState) error

type Factory 

type Factory func(*DriverContext) Driver

Factory is used to instantiate a new Driver

type JavaDriver 

type JavaDriver struct {
	DriverContext
	fingerprint.StaticFingerprinter
	// contains filtered or unexported fields
}

JavaDriver is a simple driver to execute applications packaged in Jars. It literally just fork/execs tasks with the java command.

func (*JavaDriver) Abilities 

func (d *JavaDriver) Abilities() DriverAbilities

func (*JavaDriver) Cleanup 

func (d *JavaDriver) Cleanup(*ExecContext, *CreatedResources) error

func (*JavaDriver) FSIsolation 

func (d *JavaDriver) FSIsolation() cstructs.FSIsolation

func (*JavaDriver) Fingerprint 

func (d *JavaDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*JavaDriver) Open 

func (d *JavaDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*JavaDriver) Prestart 

func (d *JavaDriver) Prestart(*ExecContext, *structs.Task) (*PrestartResponse, error)

func (*JavaDriver) Start 

func (d *JavaDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

func (*JavaDriver) Validate 

func (d *JavaDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type JavaDriverConfig 

type JavaDriverConfig struct {
	Class     string   `mapstructure:"class"`
	ClassPath string   `mapstructure:"class_path"`
	JarPath   string   `mapstructure:"jar_path"`
	JvmOpts   []string `mapstructure:"jvm_options"`
	Args      []string `mapstructure:"args"`
}

func NewJavaDriverConfig 

func NewJavaDriverConfig(task *structs.Task, env *env.TaskEnv) (*JavaDriverConfig, error)

type LaunchCmdArgs 

type LaunchCmdArgs struct {
	Cmd *executor.ExecCommand
}

LaunchCmdArgs wraps a user command and the args for the purposes of RPC

type LogEventFn 

type LogEventFn func(message string, args ...interface{})

LogEventFn is a callback which allows Drivers to emit task events.

type PluginReattachConfig 

type PluginReattachConfig struct {
	Pid      int
	AddrNet  string
	AddrName string
}

ExecutorReattachConfig is the config that we seralize and de-serialize and store in disk

func NewPluginReattachConfig 

func NewPluginReattachConfig(c *plugin.ReattachConfig) *PluginReattachConfig

func (*PluginReattachConfig) PluginConfig 

func (c *PluginReattachConfig) PluginConfig() *plugin.ReattachConfig

PluginConfig returns a config from an ExecutorReattachConfig

type PrestartResponse 

type PrestartResponse struct {
	// CreatedResources by the driver.
	CreatedResources *CreatedResources

	// Network contains driver-specific network parameters such as the port
	// map between the host and a container.
	//
	// Since the network configuration may not be fully populated by
	// Prestart, it will only be used for creating an environment for
	// Start. It will be overridden by the DriverNetwork returned by Start.
	Network *cstructs.DriverNetwork
}

PrestartResponse is driver state returned by Driver.Prestart.

func NewPrestartResponse 

func NewPrestartResponse() *PrestartResponse

NewPrestartResponse creates a new PrestartResponse with CreatedResources initialized.

type QemuDriver 

type QemuDriver struct {
	DriverContext
	fingerprint.StaticFingerprinter
	// contains filtered or unexported fields
}

QemuDriver is a driver for running images via Qemu We attempt to chose sane defaults for now, with more configuration available planned in the future

func (*QemuDriver) Abilities 

func (d *QemuDriver) Abilities() DriverAbilities

func (*QemuDriver) Cleanup 

func (d *QemuDriver) Cleanup(*ExecContext, *CreatedResources) error

func (*QemuDriver) FSIsolation 

func (d *QemuDriver) FSIsolation() cstructs.FSIsolation

func (*QemuDriver) Fingerprint 

func (d *QemuDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*QemuDriver) Open 

func (d *QemuDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*QemuDriver) Prestart 

func (d *QemuDriver) Prestart(_ *ExecContext, task *structs.Task) (*PrestartResponse, error)

func (*QemuDriver) Start 

func (d *QemuDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

Run an existing Qemu image. Start() will pull down an existing, valid Qemu image and save it to the Drivers Allocation Dir

func (*QemuDriver) Validate 

func (d *QemuDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type QemuDriverConfig 

type QemuDriverConfig struct {
	ImagePath        string           `mapstructure:"image_path"`
	Accelerator      string           `mapstructure:"accelerator"`
	GracefulShutdown bool             `mapstructure:"graceful_shutdown"`
	PortMap          []map[string]int `mapstructure:"port_map"` // A map of host port labels and to guest ports.
	Args             []string         `mapstructure:"args"`     // extra arguments to qemu executable
}

type RawExecDriver 

type RawExecDriver struct {
	DriverContext
	fingerprint.StaticFingerprinter
}

The RawExecDriver is a privileged version of the exec driver. It provides no resource isolation and just fork/execs. The Exec driver should be preferred and this should only be used when explicitly needed.

func (*RawExecDriver) Abilities 

func (d *RawExecDriver) Abilities() DriverAbilities

func (*RawExecDriver) Cleanup 

func (d *RawExecDriver) Cleanup(*ExecContext, *CreatedResources) error

func (*RawExecDriver) FSIsolation 

func (d *RawExecDriver) FSIsolation() cstructs.FSIsolation

func (*RawExecDriver) Fingerprint 

func (d *RawExecDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*RawExecDriver) Open 

func (d *RawExecDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*RawExecDriver) Prestart 

func (d *RawExecDriver) Prestart(*ExecContext, *structs.Task) (*PrestartResponse, error)

func (*RawExecDriver) Start 

func (d *RawExecDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

func (*RawExecDriver) Validate 

func (d *RawExecDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type RktDriver 

type RktDriver struct {
	DriverContext
	// contains filtered or unexported fields
}

RktDriver is a driver for running images via Rkt We attempt to chose sane defaults for now, with more configuration available planned in the future

func (*RktDriver) Abilities 

func (d *RktDriver) Abilities() DriverAbilities

func (*RktDriver) Cleanup 

func (d *RktDriver) Cleanup(*ExecContext, *CreatedResources) error

func (*RktDriver) FSIsolation 

func (d *RktDriver) FSIsolation() cstructs.FSIsolation

func (*RktDriver) Fingerprint 

func (d *RktDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*RktDriver) Open 

func (d *RktDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error)

func (*RktDriver) Periodic 

func (d *RktDriver) Periodic() (bool, time.Duration)

func (*RktDriver) Prestart 

func (d *RktDriver) Prestart(ctx *ExecContext, task *structs.Task) (*PrestartResponse, error)

func (*RktDriver) Start 

func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (*StartResponse, error)

Run an existing Rkt image.

func (*RktDriver) Validate 

func (d *RktDriver) Validate(config map[string]interface{}) error

Validate is used to validate the driver configuration

type RktDriverConfig 

type RktDriverConfig struct {
	ImageName        string              `mapstructure:"image"`
	Command          string              `mapstructure:"command"`
	Args             []string            `mapstructure:"args"`
	TrustPrefix      string              `mapstructure:"trust_prefix"`
	DNSServers       []string            `mapstructure:"dns_servers"`        // DNS Server for containers
	DNSSearchDomains []string            `mapstructure:"dns_search_domains"` // DNS Search domains for containers
	Net              []string            `mapstructure:"net"`                // Networks for the containers
	PortMapRaw       []map[string]string `mapstructure:"port_map"`           //
	PortMap          map[string]string   `mapstructure:"-"`                  // A map of host port and the port name defined in the image manifest file
	Volumes          []string            `mapstructure:"volumes"`            // Host-Volumes to mount in, syntax: /path/to/host/directory:/destination/path/in/container[:readOnly]
	InsecureOptions  []string            `mapstructure:"insecure_options"`   // list of args for --insecure-options

	NoOverlay bool `mapstructure:"no_overlay"` // disable overlayfs for rkt run
	Debug     bool `mapstructure:"debug"`      // Enable debug option for rkt command
}

type ScriptExecutor 

type ScriptExecutor interface {
	Exec(ctx context.Context, cmd string, args []string) ([]byte, int, error)
}

ScriptExecutor is an interface that supports Exec()ing commands in the driver's context. Split out of DriverHandle to ease testing.

type StartResponse 

type StartResponse struct {
	// Handle to the driver's task executor for controlling the lifecycle
	// of the task.
	Handle DriverHandle

	// Network contains driver-specific network parameters such as the port
	// map between the host and a container.
	//
	// Network may be nil as not all drivers or configurations create
	// networks.
	Network *cstructs.DriverNetwork
}

StartResponse is returned by Driver.Start.

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