cluster

package
v0.12.0 Latest Latest
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 Go to latest Published: Dec 16, 2021 License: Apache-2.0 Imports: 28 Imported by: 5

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Index

Constants

View Source 
const K0sMinVersion = "0.11.0-rc1"

K0sMinVersion is the minimum k0s version supported

Variables

This section is empty.

Functions

func TokenID 

func TokenID(s string) (string, error)

TokenID returns a token id from a token string that can be used to invalidate the token

Types

type Flags 

type Flags []string

Flags is a slice of strings with added functions to ease manipulating lists of command-line flags

func (*Flags) Add 

func (f *Flags) Add(s string)

Add adds a flag regardless if it exists already or not

func (*Flags) AddOrReplace 

func (f *Flags) AddOrReplace(s string)

AddOrReplace replaces a flag with the same prefix or adds a new one if one does not exist

func (*Flags) AddUnlessExist 

func (f *Flags) AddUnlessExist(s string)

AddUnlessExist adds a flag unless one with the same prefix exists

func (*Flags) Delete 

func (f *Flags) Delete(s string)

Delete removes a matching flag from the list

func (Flags) Get 

func (f Flags) Get(s string) string

Get returns the full flag with the possible value such as "--san=10.0.0.1" or "" when not found

func (Flags) GetValue 

func (f Flags) GetValue(s string) string

GetValue returns the value part of a flag such as "10.0.0.1" for a flag like "--san=10.0.0.1"

func (Flags) Include 

func (f Flags) Include(s string) bool

Include returns true if a flag with a matching prefix can be found

func (Flags) Index 

func (f Flags) Index(s string) int

Index returns an index to a flag with a matching prefix

func (*Flags) Join 

func (f *Flags) Join() string

Join creates a string separated by spaces

func (*Flags) Merge 

func (f *Flags) Merge(b Flags)

Merge takes the flags from another Flags and adds them to this one unless this already has that flag set

func (*Flags) MergeAdd 

func (f *Flags) MergeAdd(b Flags)

MergeAdd takes the flags from another Flags and adds them into this one even if they exist

func (*Flags) MergeOverwrite 

func (f *Flags) MergeOverwrite(b Flags)

MergeOverwrite takes the flags from another Flags and adds or replaces them into this one

type Hooks 

type Hooks map[string]map[string][]string

Hooks define a list of hooks such as hooks["apply"]["before"] = ["ls -al", "rm foo.txt"]

func (Hooks) ForActionAndStage 

func (h Hooks) ForActionAndStage(action, stage string) []string

ForActionAndStage return hooks for given action and stage

type Host 

type Host struct {
	rig.Connection `yaml:",inline"`

	Role             string            `yaml:"role"`
	PrivateInterface string            `yaml:"privateInterface,omitempty"`
	PrivateAddress   string            `yaml:"privateAddress,omitempty"`
	Environment      map[string]string `yaml:"environment,flow,omitempty"`
	UploadBinary     bool              `yaml:"uploadBinary,omitempty"`
	K0sBinaryPath    string            `yaml:"k0sBinaryPath,omitempty"`
	InstallFlags     Flags             `yaml:"installFlags,omitempty"`
	Files            []*UploadFile     `yaml:"files,omitempty"`
	OSIDOverride     string            `yaml:"os,omitempty"`
	HostnameOverride string            `yaml:"hostname,omitempty"`
	Hooks            Hooks             `yaml:"hooks,omitempty"`

	UploadBinaryPath string       `yaml:"-"`
	Metadata         HostMetadata `yaml:"-"`
	Configurer       configurer   `yaml:"-"`
}

Host contains all the needed details to work with hosts

func (*Host) Address 

func (h *Host) Address() string

Address returns an address for the host

func (*Host) CheckHTTPStatus 

func (h *Host) CheckHTTPStatus(url string, expected ...int) error

CheckHTTPStatus will perform a web request to the url and return an error if the http status is not the expected

func (*Host) DrainNode 

func (h *Host) DrainNode(node *Host) error

DrainNode drains the given node

func (*Host) IsController 

func (h *Host) IsController() bool

IsController returns true for controller and controller+worker roles

func (*Host) K0sBackupCommand 

func (h *Host) K0sBackupCommand(targetDir string) string

K0sBackupCommand returns a full command to be used as run k0s backup

func (*Host) K0sConfigPath 

func (h *Host) K0sConfigPath() string

K0sConfigPath returns the config file path from install flags or configurer

func (*Host) K0sInstallCommand 

func (h *Host) K0sInstallCommand() string

K0sInstallCommand returns a full command that will install k0s service with necessary flags

func (*Host) K0sJoinTokenPath 

func (h *Host) K0sJoinTokenPath() string

K0sJoinTokenPath returns the token file path from install flags or configurer

func (*Host) K0sRestoreCommand 

func (h *Host) K0sRestoreCommand(backupfile string) string

K0sRestoreCommand returns a full command to restore cluster state from a backup

func (*Host) K0sServiceName 

func (h *Host) K0sServiceName() string

K0sServiceName returns correct service name

func (*Host) KubeNodeReady 

func (h *Host) KubeNodeReady(node *Host) (bool, error)

KubeNodeReady runs kubectl on the host and returns true if the given node is marked as ready

func (*Host) NeedCurl 

func (h *Host) NeedCurl() bool

NeedCurl returns true when the curl package is needed on the host

func (*Host) NeedIPTables 

func (h *Host) NeedIPTables() bool

NeedIPTables returns true when the iptables package is needed on the host

func (*Host) NeedInetUtils 

func (h *Host) NeedInetUtils() bool

NeedInetUtils returns true when the inetutils package is needed on the host to run `hostname`.

func (*Host) Protocol 

func (h *Host) Protocol() string

Protocol returns host communication protocol

func (*Host) ResolveConfigurer 

func (h *Host) ResolveConfigurer() error

ResolveConfigurer assigns a rig-style configurer to the Host (see configurer/)

func (*Host) SetDefaults 

func (h *Host) SetDefaults()

func (*Host) UncordonNode 

func (h *Host) UncordonNode(node *Host) error

UncordonNode marks the node schedulable again

func (*Host) UnmarshalYAML 

func (h *Host) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML sets in some sane defaults when unmarshaling the data from yaml

func (*Host) UpdateK0sBinary 

func (h *Host) UpdateK0sBinary(version string) error

UpdateK0sBinary updates the binary on the host either by downloading or uploading, based on the config

func (*Host) Validate 

func (h *Host) Validate() error

func (*Host) WaitHTTPStatus 

func (h *Host) WaitHTTPStatus(url string, expected ...int) error

WaitHTTPStatus waits until http status received for a GET from the URL is the expected one

func (*Host) WaitK0sServiceRunning 

func (h *Host) WaitK0sServiceRunning() error

WaitK0sServiceRunning blocks until the k0s service is running on the host

func (*Host) WaitK0sServiceStopped 

func (h *Host) WaitK0sServiceStopped() error

WaitK0sServiceStopped blocks until the k0s service is no longer running on the host

func (*Host) WaitKubeAPIReady 

func (h *Host) WaitKubeAPIReady(port int) error

WaitKubeAPIReady blocks until the local kube api responds to /version

func (*Host) WaitKubeNodeReady 

func (h *Host) WaitKubeNodeReady(node *Host) error

WaitKubeNodeReady blocks until node becomes ready. TODO should probably use Context

type HostMetadata 

type HostMetadata struct {
	K0sBinaryVersion  string
	K0sRunningVersion string
	Arch              string
	IsK0sLeader       bool
	Hostname          string
	Ready             bool
	NeedsUpgrade      bool
}

HostMetadata resolved metadata for host

type Hosts 

type Hosts []*Host

Hosts are destnation hosts

func (Hosts) Controllers 

func (hosts Hosts) Controllers() Hosts

Controllers returns hosts with the role "controller"

func (Hosts) Filter 

func (hosts Hosts) Filter(filter func(h *Host) bool) Hosts

Filter returns a filtered list of Hosts. The filter function should return true for hosts matching the criteria.

func (Hosts) Find 

func (hosts Hosts) Find(filter func(h *Host) bool) *Host

Find returns the first matching Host. The finder function should return true for a Host matching the criteria.

func (Hosts) First 

func (hosts Hosts) First() *Host

First returns the first host

func (Hosts) Last 

func (hosts Hosts) Last() *Host

Last returns the last host

func (Hosts) ParallelEach 

func (hosts Hosts) ParallelEach(filter ...func(h *Host) error) error

ParallelEach runs a function (or multiple functions chained) on every Host parallelly. Any errors will be concatenated and returned.

func (Hosts) Validate 

func (hosts Hosts) Validate() error

func (Hosts) WithRole 

func (hosts Hosts) WithRole(s string) Hosts

WithRole returns a ltered list of Hosts that have the given role

func (Hosts) Workers 

func (hosts Hosts) Workers() Hosts

Workers returns hosts with the role "worker"

type K0s 

type K0s struct {
	Version  string      `yaml:"version"`
	Config   dig.Mapping `yaml:"config,omitempty"`
	Metadata K0sMetadata `yaml:"-"`
}

K0s holds configuration for bootstraping a k0s cluster

func (K0s) GenerateToken 

func (k K0s) GenerateToken(h *Host, role string, expiry time.Duration) (token string, err error)

GenerateToken runs the k0s token create command

func (K0s) GetClusterID 

func (k K0s) GetClusterID(h *Host) (string, error)

GetClusterID uses kubectl to fetch the kube-system namespace uid

func (*K0s) SetDefaults 

func (k *K0s) SetDefaults()

SetDefaults (implements defaults Setter interface) defaults the version to latest k0s version

func (*K0s) UnmarshalYAML 

func (k *K0s) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML sets in some sane defaults when unmarshaling the data from yaml

func (*K0s) Validate 

func (k *K0s) Validate() error

type K0sMetadata 

type K0sMetadata struct {
	ClusterID        string
	VersionDefaulted bool
}

K0sMetadata contains gathered information about k0s cluster

type LocalFile 

type LocalFile struct {
	Path     string
	PermMode string
}

type Spec 

type Spec struct {
	Hosts Hosts `yaml:"hosts"`
	K0s   *K0s  `yaml:"k0s"`
	// contains filtered or unexported fields
}

Spec defines cluster config spec section

func (*Spec) K0sLeader 

func (s *Spec) K0sLeader() *Host

K0sLeader returns a controller host that is selected to be a "leader", or an initial node, a node that creates join tokens for other controllers.

func (*Spec) KubeAPIURL 

func (s *Spec) KubeAPIURL() string

KubeAPIURL returns an url to the cluster's kube api

func (*Spec) UnmarshalYAML 

func (s *Spec) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML sets in some sane defaults when unmarshaling the data from yaml

func (*Spec) Validate 

func (s *Spec) Validate() error

type UploadFile 

type UploadFile struct {
	Name            string       `yaml:"name,omitempty"`
	Source          string       `yaml:"src"`
	DestinationDir  string       `yaml:"dstDir"`
	DestinationFile string       `yaml:"dst"`
	PermMode        interface{}  `yaml:"perm"`
	DirPermMode     interface{}  `yaml:"dirPerm"`
	User            string       `yaml:"user"`
	Group           string       `yaml:"group"`
	PermString      string       `yaml:"-"`
	DirPermString   string       `yaml:"-"`
	Sources         []*LocalFile `yaml:"-"`
	Base            string       `yaml:"-"`
}

UploadFile describes a file to be uploaded for the host

func (*UploadFile) IsURL 

func (u *UploadFile) IsURL() bool

IsURL returns true if the source is a URL

func (*UploadFile) Owner 

func (u *UploadFile) Owner() string

Owner returns a chown compatible user:group string from User and Group, or empty when neither are set.

func (*UploadFile) String 

func (u *UploadFile) String() string

String returns the file bundle name or if it is empty, the source.

func (*UploadFile) UnmarshalYAML 

func (u *UploadFile) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML sets in some sane defaults when unmarshaling the data from yaml

func (UploadFile) Validate 

func (u UploadFile) Validate() error

Source Files

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