libkpod

Documentation

Index

• Constants
• type Config
  • func DefaultConfig() *Config
  • func (c *Config) ToFile(path string) error
  • func (c *Config) UpdateFromFile(path string) error
• type HookParams
• type ImageConfig
• type ImageVolumesType
• type NetworkConfig
• type RootConfig
• type RuntimeConfig

Constants

const (
	// DefaultPidsLimit is the default value for maximum number of processes
	// allowed inside a container
	DefaultPidsLimit = 1024

	// DefaultLogSizeMax is the default value for the maximum log size
	// allowed for a container. Negative values mean that no limit is imposed.
	DefaultLogSizeMax = -1
)

const (
	// DefaultHooksDirPath Default directory containing hooks config files
	DefaultHooksDirPath = "/usr/share/containers/oci/hooks.d"
	// OverrideHooksDirPath Directory where admin can override the default configuration
	OverrideHooksDirPath = "/etc/containers/oci/hooks.d"
)

import (

"encoding/json"
"io/ioutil"
	"os"
	"path/filepath"
	"regexp"
	"strings"
	"syscall"

	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"

)

Types

type Config

type Config struct {
	RootConfig
	RuntimeConfig
	ImageConfig
	NetworkConfig
}

Config represents the entire set of configuration values that can be set for the server. This is intended to be loaded from a toml-encoded config file.

func DefaultConfig

func DefaultConfig() *Config

DefaultConfig returns the default configuration for crio.

func (*Config) ToFile

func (c *Config) ToFile(path string) error

ToFile outputs the given Config as a TOML-encoded file at the given path. Returns errors encountered when generating or writing the file, or nil otherwise.

func (*Config) UpdateFromFile

func (c *Config) UpdateFromFile(path string) error

UpdateFromFile populates the Config from the TOML-encoded file at the given path. Returns errors encountered when reading or parsing the files, or nil otherwise.

type HookParams

type HookParams struct {
	Hook          string   `json:"hook"`
	Stage         []string `json:"stage"`
	Cmds          []string `json:"cmd"`
	Annotations   []string `json:"annotation"`
	HasBindMounts bool     `json:"hasbindmounts"`
}

HookParams is the structure returned from read the hooks configuration

type ImageConfig

type ImageConfig struct {
	// DefaultTransport is a value we prefix to image names that fail to
	// validate source references.
	DefaultTransport string `toml:"default_transport"`
	// PauseImage is the name of an image which we use to instantiate infra
	// containers.
	PauseImage string `toml:"pause_image"`
	// PauseCommand is the path of the binary we run in an infra
	// container that's been instantiated using PauseImage.
	PauseCommand string `toml:"pause_command"`
	// SignaturePolicyPath is the name of the file which decides what sort
	// of policy we use when deciding whether or not to trust an image that
	// we've pulled.  Outside of testing situations, it is strongly advised
	// that this be left unspecified so that the default system-wide policy
	// will be used.
	SignaturePolicyPath string `toml:"signature_policy"`
	// InsecureRegistries is a list of registries that must be contacted w/o
	// TLS verification.
	InsecureRegistries []string `toml:"insecure_registries"`
	// ImageVolumes controls how volumes specified in image config are handled
	ImageVolumes ImageVolumesType `toml:"image_volumes"`
	// Registries holds a list of registries used to pull unqualified images
	Registries []string `toml:"registries"`
}

ImageConfig represents the "crio.image" TOML config table.

type ImageVolumesType

type ImageVolumesType string

ImageVolumesType describes image volume handling strategies

const (
	// ImageVolumesMkdir option is for using mkdir to handle image volumes
	ImageVolumesMkdir ImageVolumesType = "mkdir"
	// ImageVolumesIgnore option is for ignoring image volumes altogether
	ImageVolumesIgnore ImageVolumesType = "ignore"
	// ImageVolumesBind option is for using bind mounted volumes
	ImageVolumesBind ImageVolumesType = "bind"
)

type NetworkConfig

type NetworkConfig struct {
	// NetworkDir is where CNI network configuration files are stored.
	NetworkDir string `toml:"network_dir"`

	// PluginDir is where CNI plugin binaries are stored.
	PluginDir string `toml:"plugin_dir"`
}

NetworkConfig represents the "crio.network" TOML config table

type RootConfig

type RootConfig struct {
	// Root is a path to the "root directory" where data not
	// explicitly handled by other options will be stored.
	Root string `toml:"root"`

	// RunRoot is a path to the "run directory" where state information not
	// explicitly handled by other options will be stored.
	RunRoot string `toml:"runroot"`

	// Storage is the name of the storage driver which handles actually
	// storing the contents of containers.
	Storage string `toml:"storage_driver"`

	// StorageOption is a list of storage driver specific options.
	StorageOptions []string `toml:"storage_option"`

	// LogDir is the default log directory were all logs will go unless kubelet
	// tells us to put them somewhere else.
	LogDir string `toml:"log_dir"`

	// FileLocking specifies whether to use file-based or in-memory locking
	// File-based locking is required when multiple users of libkpod are
	// present on the same system
	FileLocking bool `toml:"file_locking"`
}

RootConfig represents the root of the "crio" TOML config table.

type RuntimeConfig

type RuntimeConfig struct {
	// Runtime is the OCI compatible runtime used for trusted container workloads.
	// This is a mandatory setting as this runtime will be the default one and
	// will also be used for untrusted container workloads if
	// RuntimeUntrustedWorkload is not set.
	Runtime string `toml:"runtime"`

	// RuntimeUntrustedWorkload is the OCI compatible runtime used for untrusted
	// container workloads. This is an optional setting, except if
	// DefaultWorkloadTrust is set to "untrusted".
	RuntimeUntrustedWorkload string `toml:"runtime_untrusted_workload"`

	// DefaultWorkloadTrust is the default level of trust crio puts in container
	// workloads. This can either be "trusted" or "untrusted" and the default
	// is "trusted"
	// Containers can be run through different container runtimes, depending on
	// the trust hints we receive from kubelet:
	// - If kubelet tags a container workload as untrusted, crio will try first
	// to run it through the untrusted container workload runtime. If it is not
	// set, crio will use the trusted runtime.
	// - If kubelet does not provide any information about the container workload trust
	// level, the selected runtime will depend on the DefaultWorkloadTrust setting.
	// If it is set to "untrusted", then all containers except for the host privileged
	// ones, will be run by the RuntimeUntrustedWorkload runtime. Host privileged
	// containers are by definition trusted and will always use the trusted container
	// runtime. If DefaultWorkloadTrust is set to "trusted", crio will use the trusted
	// container runtime for all containers.
	DefaultWorkloadTrust string `toml:"default_workload_trust"`

	// NoPivot instructs the runtime to not use `pivot_root`, but instead use `MS_MOVE`
	NoPivot bool `toml:"no_pivot"`

	// Conmon is the path to conmon binary, used for managing the runtime.
	Conmon string `toml:"conmon"`

	// ConmonEnv is the environment variable list for conmon process.
	ConmonEnv []string `toml:"conmon_env"`

	// SELinux determines whether or not SELinux is used for pod separation.
	SELinux bool `toml:"selinux"`

	// SeccompProfile is the seccomp json profile path which is used as the
	// default for the runtime.
	SeccompProfile string `toml:"seccomp_profile"`

	// ApparmorProfile is the apparmor profile name which is used as the
	// default for the runtime.
	ApparmorProfile string `toml:"apparmor_profile"`

	// CgroupManager is the manager implementation name which is used to
	// handle cgroups for containers.
	CgroupManager string `toml:"cgroup_manager"`

	// HooksDirPath location of oci hooks config files
	HooksDirPath string `toml:"hooks_dir_path"`

	// DefaultMounts is the list of mounts to be mounted for each container
	// The format of each mount is "host-path:container-path"
	DefaultMounts []string `toml:"default_mounts"`

	// Hooks List of hooks to run with container
	Hooks map[string]HookParams

	// PidsLimit is the number of processes each container is restricted to
	// by the cgroup process number controller.
	PidsLimit int64 `toml:"pids_limit"`

	// LogSizeMax is the maximum number of bytes after which the log file
	// will be truncated. It can be expressed as a human-friendly string
	// that is parsed to bytes.
	// Negative values indicate that the log file won't be truncated.
	LogSizeMax int64 `toml:"log_size_max"`

	// ContainerExitsDir is the directory in which container exit files are
	// written to by conmon.
	ContainerExitsDir string `toml:"container_exits_dir"`
}

RuntimeConfig represents the "crio.runtime" TOML config table.