types

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 Go to latest Published: Feb 5, 2021 License: MIT Imports: 5 Imported by: 1

Documentation

Overview

Copyright © 2020 The k3d Author(s)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Index

Constants

View Source 
const (
	LabelClusterName          string = "k3d.cluster"
	LabelClusterURL           string = "k3d.cluster.url"
	LabelClusterToken         string = "k3d.cluster.token"
	LabelImageVolume          string = "k3d.cluster.imageVolume"
	LabelNetworkExternal      string = "k3d.cluster.network.external"
	LabelNetwork              string = "k3d.cluster.network"
	LabelNetworkID            string = "k3d.cluster.network.id"
	LabelRole                 string = "k3d.role"
	LabelServerAPIPort        string = "k3d.server.api.port"
	LabelServerAPIHost        string = "k3d.server.api.host"
	LabelServerAPIHostIP      string = "k3d.server.api.hostIP"
	LabelServerIsInit         string = "k3d.server.init"
	LabelRegistryHost         string = "k3d.registry.host"
	LabelRegistryHostIP       string = "k3d.registry.hostIP"
	LabelRegistryPortExternal string = "k3s.registry.port.external"
	LabelRegistryPortInternal string = "k3s.registry.port.internal"
)

List of k3d technical label name

View Source 
const (
	DefaultRegistryPort       = "5000"
	DefaultRegistryName       = DefaultObjectNamePrefix + "-registry"
	DefaultRegistriesFilePath = "/etc/rancher/k3s/registries.yaml"
	DefaultRegistryMountPath  = "/var/lib/registry"
	DefaultDockerHubAddress   = "registry-1.docker.io"
	// Default temporary path for the LocalRegistryHosting configmap, from where it will be applied via kubectl
	DefaultLocalRegistryHostingConfigmapTempPath = "/tmp/localRegistryHostingCM.yaml"
)

Registry Defaults

View Source 
const DefaultAPIHost = "0.0.0.0"

DefaultAPIHost defines the default host (IP) for the Kubernetes API

View Source 
const DefaultAPIPort = "6443"

DefaultAPIPort defines the default Kubernetes API Port

View Source 
const DefaultClusterName = "k3s-default"

DefaultClusterName specifies the default name used for newly created clusters

View Source 
const DefaultClusterNameMaxLength = 32

DefaultClusterNameMaxLength specifies the maximal length of a passed in cluster name This restriction allows us to construct an name consisting of <DefaultObjectNamePrefix[3]>-<ClusterName>-<TypeSuffix[5-10]>-<Counter[1-3]> ... and still stay within the 64 character limit (e.g. of docker)

View Source 
const DefaultConfigDirName = ".k3d" // should end up in $HOME/

DefaultConfigDirName defines the name of the config directory (where we'll e.g. put the kubeconfigs)

View Source 
const DefaultImageVolumeMountPath = "/k3d/images"

DefaultImageVolumeMountPath defines the mount path inside k3d nodes where we will mount the shared image volume by default

View Source 
const DefaultK3dInternalHostRecord = "host.k3d.internal"

DefaultK3dInternalHostRecord defines the default /etc/hosts entry for the k3d host

View Source 
const DefaultK3sImageRepo = "docker.io/rancher/k3s"

DefaultK3sImageRepo specifies the default image repository for the used k3s image

View Source 
const DefaultKubeconfigPrefix = DefaultObjectNamePrefix + "-kubeconfig"

DefaultKubeconfigPrefix defines the default prefix for kubeconfig files

View Source 
const DefaultLBImageRepo = "docker.io/rancher/k3d-proxy"

DefaultLBImageRepo defines the default cluster load balancer image

View Source 
const DefaultObjectNamePrefix = "k3d"

DefaultObjectNamePrefix defines the name prefix for every object created by k3d

View Source 
const DefaultRegistryImageRepo = "docker.io/library/registry"

DefaultRegistryImageRepo defines the default image used for the k3d-managed registry

View Source 
const DefaultRegistryImageTag = "2"

DefaultRegistryImageTag defines the default image tag used for the k3d-managed registry

View Source 
const DefaultToolsImageRepo = "docker.io/rancher/k3d-tools"

DefaultToolsImageRepo defines the default image used for the tools container

View Source 
const NodeStatusRestarting = "restarting"

NodeStatusRestarting defines the status string that signals the node container is restarting

View Source 
const NodeWaitForLogMessageRestartWarnTime = 2 * time.Minute

NodeWaitForLogMessageRestartWarnTime is the time after which to warn about a restarting container

Variables

View Source 
var ClusterExternalNodeRoles = []Role{
	RegistryRole,
}

ClusterExternalNodeRoles is a list of roles for nodes that do not belong to a specific cluster

View Source 
var ClusterInternalNodeRoles = []Role{
	ServerRole,
	AgentRole,
	LoadBalancerRole,
}

ClusterInternalNodeRoles is a list of roles for nodes that belong to a cluster

View Source 
var DefaultNodeEnv = []string{
	"K3S_KUBECONFIG_OUTPUT=/output/kubeconfig.yaml",
}

DefaultNodeEnv defines some default environment variables that should be set on every node

View Source 
var DefaultObjectLabels = map[string]string{
	"app": "k3d",
}

DefaultObjectLabels specifies a set of labels that will be attached to k3d objects by default

View Source 
var DefaultRoleCmds = map[Role][]string{
	ServerRole: {"server"},
	AgentRole:  {"agent"},
}

DefaultRoleCmds maps the node roles to their respective default commands

View Source 
var DefaultTmpfsMounts = []string{
	"/run",
	"/var/run",
}

DefaultTmpfsMounts specifies tmpfs mounts that are required for all k3d nodes

View Source 
var DoNotCopyServerFlags = []string{
	"--cluster-init",
}

DoNotCopyServerFlags defines a list of commands/args that shouldn't be copied from an existing node when adding a similar node to a cluster

View Source 
var NodeRoles = map[string]Role{
	string(ServerRole):       ServerRole,
	string(AgentRole):        AgentRole,
	string(LoadBalancerRole): LoadBalancerRole,
	string(RegistryRole):     RegistryRole,
}

NodeRoles defines the roles available for nodes

View Source 
var ReadyLogMessageByRole = map[Role]string{
	ServerRole:       "k3s is up and running",
	AgentRole:        "Successfully registered node",
	LoadBalancerRole: "start worker processes",
	RegistryRole:     "listening on",
}

ReadyLogMessageByRole defines the log messages we wait for until a server node is considered ready

Functions

func GetDefaultObjectName 

func GetDefaultObjectName(name string) string

GetDefaultObjectName prefixes the passed name with the default prefix

Types

type AgentOpts 

type AgentOpts struct{}

AgentOpts describes some additional agent role specific opts

type Cluster 

type Cluster struct {
	Name               string             `yaml:"name" json:"name,omitempty"`
	Network            ClusterNetwork     `yaml:"network" json:"network,omitempty"`
	Token              string             `yaml:"clusterToken" json:"clusterToken,omitempty"`
	Nodes              []*Node            `yaml:"nodes" json:"nodes,omitempty"`
	InitNode           *Node              // init server node
	ExternalDatastore  *ExternalDatastore `yaml:"externalDatastore,omitempty" json:"externalDatastore,omitempty"`
	KubeAPI            *ExposureOpts      `yaml:"kubeAPI" json:"kubeAPI,omitempty"`
	ServerLoadBalancer *Node              `yaml:"serverLoadbalancer,omitempty" json:"serverLoadBalancer,omitempty"`
	ImageVolume        string             `yaml:"imageVolume" json:"imageVolume,omitempty"`
}

Cluster describes a k3d cluster

func (*Cluster) AgentCountRunning 

func (c *Cluster) AgentCountRunning() (int, int)

AgentCountRunning returns the number of agent nodes running in the cluster and the total number

func (*Cluster) HasLoadBalancer 

func (c *Cluster) HasLoadBalancer() bool

HasLoadBalancer returns true if cluster has a loadbalancer node

func (*Cluster) ServerCountRunning 

func (c *Cluster) ServerCountRunning() (int, int)

ServerCountRunning returns the number of server nodes running in the cluster and the total number

type ClusterCreateOpts 

type ClusterCreateOpts struct {
	PrepDisableHostIPInjection bool              `yaml:"prepDisableHostIPInjection" json:"prepDisableHostIPInjection,omitempty"`
	DisableImageVolume         bool              `yaml:"disableImageVolume" json:"disableImageVolume,omitempty"`
	WaitForServer              bool              `yaml:"waitForServer" json:"waitForServer,omitempty"`
	Timeout                    time.Duration     `yaml:"timeout" json:"timeout,omitempty"`
	DisableLoadBalancer        bool              `yaml:"disableLoadbalancer" json:"disableLoadbalancer,omitempty"`
	K3sServerArgs              []string          `yaml:"k3sServerArgs" json:"k3sServerArgs,omitempty"`
	K3sAgentArgs               []string          `yaml:"k3sAgentArgs" json:"k3sAgentArgs,omitempty"`
	GPURequest                 string            `yaml:"gpuRequest" json:"gpuRequest,omitempty"`
	NodeHooks                  []NodeHook        `yaml:"nodeHooks,omitempty" json:"nodeHooks,omitempty"`
	GlobalLabels               map[string]string `yaml:"globalLabels,omitempty" json:"globalLabels,omitempty"`
	GlobalEnv                  []string          `yaml:"globalEnv,omitempty" json:"globalEnv,omitempty"`
	Registries                 struct {
		Create *Registry     `yaml:"create,omitempty" json:"create,omitempty"`
		Use    []*Registry   `yaml:"use,omitempty" json:"use,omitempty"`
		Config *k3s.Registry `yaml:"config,omitempty" json:"config,omitempty"` // registries.yaml (k3s config for containerd registry override)
	} `yaml:"registries,omitempty" json:"registries,omitempty"`
}

ClusterCreateOpts describe a set of options one can set when creating a cluster

type ClusterDeleteOpts 

type ClusterDeleteOpts struct {
	SkipRegistryCheck bool // skip checking if this is a registry (and act accordingly)
}

ClusterDeleteOpts describe a set of options one can set when deleting a cluster

type ClusterNetwork 

type ClusterNetwork struct {
	Name     string `yaml:"name" json:"name,omitempty"`
	External bool   `yaml:"external" json:"isExternal,omitempty"`
}

ClusterNetwork describes a network which a cluster is running in

type ClusterStartOpts 

type ClusterStartOpts struct {
	WaitForServer bool
	Timeout       time.Duration
	NodeHooks     []NodeHook `yaml:"nodeHooks,omitempty" json:"nodeHooks,omitempty"`
}

ClusterStartOpts describe a set of options one can set when (re-)starting a cluster

type ExposureOpts 

type ExposureOpts struct {
	nat.PortMapping        // filled automatically (reference to normal portmapping)
	Host            string `yaml:"host,omitempty" json:"host,omitempty"`
}

ExposureOpts describes settings that the user can set for accessing the Kubernetes API

type ExternalDatastore 

type ExternalDatastore struct {
	Endpoint string `yaml:"endpoint" json:"endpoint,omitempty"`
	CAFile   string `yaml:"caFile" json:"caFile,omitempty"`
	CertFile string `yaml:"certFile" json:"certFile,omitempty"`
	KeyFile  string `yaml:"keyFile" json:"keyFile,omitempty"`
	Network  string `yaml:"network" json:"network,omitempty"`
}

ExternalDatastore describes an external datastore used for HA/multi-server clusters

type ImageImportOpts 

type ImageImportOpts struct {
	KeepTar bool
}

ImageImportOpts describes a set of options one can set for loading image(s) into cluster(s)

type LifecycleStage 

type LifecycleStage string

LifecycleStage defines descriptors for specific stages in the lifecycle of a node or cluster object 

const (
	LifecycleStagePreStart  LifecycleStage = "preStart"
	LifecycleStagePostStart LifecycleStage = "postStart"
)

all defined lifecyclestages

type Node 

type Node struct {
	Name       string            `yaml:"name" json:"name,omitempty"`
	Role       Role              `yaml:"role" json:"role,omitempty"`
	Image      string            `yaml:"image" json:"image,omitempty"`
	Volumes    []string          `yaml:"volumes" json:"volumes,omitempty"`
	Env        []string          `yaml:"env" json:"env,omitempty"`
	Cmd        []string          // filled automatically based on role
	Args       []string          `yaml:"extraArgs" json:"extraArgs,omitempty"`
	Ports      nat.PortMap       `yaml:"portMappings" json:"portMappings,omitempty"`
	Restart    bool              `yaml:"restart" json:"restart,omitempty"`
	Created    string            `yaml:"created" json:"created,omitempty"`
	Labels     map[string]string // filled automatically
	Networks   []string          // filled automatically
	ExtraHosts []string          // filled automatically
	ServerOpts ServerOpts        `yaml:"serverOpts" json:"serverOpts,omitempty"`
	AgentOpts  AgentOpts         `yaml:"agentOpts" json:"agentOpts,omitempty"`
	GPURequest string            // filled automatically
	State      NodeState         // filled automatically
}

Node describes a k3d node

type NodeCreateOpts 

type NodeCreateOpts struct {
	Wait      bool
	Timeout   time.Duration
	NodeHooks []NodeHook `yaml:"nodeHooks,omitempty" json:"nodeHooks,omitempty"`
}

NodeCreateOpts describes a set of options one can set when creating a new node

type NodeDeleteOpts 

type NodeDeleteOpts struct {
	SkipLBUpdate bool // skip updating the loadbalancer
}

NodeDeleteOpts describes a set of options one can set when deleting a node

type NodeHook 

type NodeHook struct {
	Stage  LifecycleStage `yaml:"stage,omitempty" json:"stage,omitempty"`
	Action NodeHookAction `yaml:"action,omitempty" json:"action,omitempty"`
}

NodeHook is an action that is bound to a specifc stage of a node lifecycle

type NodeHookAction 

type NodeHookAction interface {
	Run(ctx context.Context, node *Node) error
}

NodeHookAction is an interface to implement actions that should trigger at specific points of the node lifecycle

type NodeStartOpts 

type NodeStartOpts struct {
	Wait            bool
	Timeout         time.Duration
	NodeHooks       []NodeHook `yaml:"nodeHooks,omitempty" json:"nodeHooks,omitempty"`
	ReadyLogMessage string
}

NodeStartOpts describes a set of options one can set when (re-)starting a node

type NodeState 

type NodeState struct {
	Running bool
	Status  string
	Started string
}

NodeState describes the current state of a node

type Registry 

type Registry struct {
	ClusterRef   string       // filled automatically -> if created with a cluster
	Protocol     string       `yaml:"protocol,omitempty" json:"protocol,omitempty"` // default: http
	Host         string       `yaml:"host" json:"host"`
	Image        string       `yaml:"image,omitempty" json:"image,omitempty"`
	ExposureOpts ExposureOpts `yaml:"expose" json:"expose"`
	Options      struct {
		ConfigFile string `yaml:"configFile,omitempty" json:"configFile,omitempty"`
		Proxy      struct {
			RemoteURL string `yaml:"remoteURL" json:"remoteURL"`
			Username  string `yaml:"username,omitempty" json:"username,omitempty"`
			Password  string `yaml:"password,omitempty" json:"password,omitempty"`
		} `yaml:"proxy,omitempty" json:"proxy,omitempty"`
	} `yaml:"options,omitempty" json:"options,omitempty"`
}

Registry describes a k3d-managed registry

type RegistryExternal 

type RegistryExternal struct {
	Protocol string `yaml:"protocol,omitempty" json:"protocol,omitempty"` // default: http
	Host     string `yaml:"host" json:"host"`
	Port     string `yaml:"port" json:"port"`
}

RegistryExternal describes a minimal spec for an "external" registry "external" meaning, that it's unrelated to the current cluster e.g. used for the --registry-use flag registry reference

type Role 

type Role string

Role defines a k3d node role 

const (
	ServerRole       Role = "server"
	AgentRole        Role = "agent"
	NoRole           Role = "noRole"
	LoadBalancerRole Role = "loadbalancer"
	RegistryRole     Role = "registry"
)

existing k3d node roles

type ServerOpts 

type ServerOpts struct {
	IsInit  bool          `yaml:"isInitializingServer" json:"isInitializingServer,omitempty"`
	KubeAPI *ExposureOpts `yaml:"kubeAPI" json:"kubeAPI"`
}

ServerOpts describes some additional server role specific opts

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