config

package
v0.6.0-alpha1-rc1 Latest Latest
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 Go to latest Published: Oct 25, 2017 License: Apache-2.0 Imports: 16 Imported by: 0

Documentation

Overview

The config package provides config inheritance for Typha.

It supports loading config from various sources, parsing and validating the config and merging the config according to the priority of the sources.

Usage

To use it, create a Config object with: 

config.New()

Load some raw config using: 

envConfig := config.LoadConfigFromEnvironment()
fileConfig, err := config.LoadConfigFile()

Then feed it to the config object: 

changed, err := config.UpdateFrom(envConfig, config.EnvironmentVariable)
...
changed, err = config.UpdateFrom(fileConfig, config.ConfigFile)

Config inheritance

Config from higher-priority sources overrides config from lower-priority sources. The priorities, in increasing order of priority, are: 

Default              // Default value of a parameter
DatastoreGlobal      // Cluster-wide config parameters from the datastore.
DatastorePerHost     // Per-host overrides from the datastore.
ConfigFile           // The local config file.
EnvironmentVariable  // Environment variables.

Index

Constants

View Source 
const (
	Default = iota
	DatastoreGlobal
	DatastorePerHost
	ConfigFile
	EnvironmentVariable
)
View Source 
const (
	MinIptablesMarkBits = 2
)

Variables

View Source 
var (
	IfaceListRegexp = regexp.MustCompile(`^[a-zA-Z0-9_-]{1,15}(,[a-zA-Z0-9_-]{1,15})*$`)
	AuthorityRegexp = regexp.MustCompile(`^[^:/]+:\d+$`)
	HostnameRegexp  = regexp.MustCompile(`^[a-zA-Z0-9_.-]+$`)
	StringRegexp    = regexp.MustCompile(`^.*$`)
)
View Source 
var SourcesInDescendingOrder = []Source{EnvironmentVariable, ConfigFile, DatastorePerHost, DatastoreGlobal}

Functions

func LoadConfigFile 

func LoadConfigFile(filename string) (map[string]string, error)

func LoadConfigFileData 

func LoadConfigFileData(data []byte) (map[string]string, error)

func LoadConfigFromEnvironment 

func LoadConfigFromEnvironment(environ []string) map[string]string

LoadConfigFromEnvironment extracts raw config parameters (identified by case-insensitive prefix "typha_") from the given OS environment variables. An environment entry of "TYPHA_FOO=bar" is translated to "foo": "bar".

Types

type BoolParam 

type BoolParam struct {
	Metadata
}

func (*BoolParam) Parse 

func (p *BoolParam) Parse(raw string) (interface{}, error)

type Config 

type Config struct {
	DatastoreType string `config:"oneof(kubernetes,etcdv2);etcdv2;non-zero,die-on-fail"`

	EtcdAddr      string   `config:"authority;127.0.0.1:2379;local"`
	EtcdScheme    string   `config:"oneof(http,https);http;local"`
	EtcdKeyFile   string   `config:"file(must-exist);;local"`
	EtcdCertFile  string   `config:"file(must-exist);;local"`
	EtcdCaFile    string   `config:"file(must-exist);;local"`
	EtcdEndpoints []string `config:"endpoint-list;;local"`

	LogFilePath string `config:"file;/var/log/calico/typha.log;die-on-fail"`

	LogSeverityFile   string `config:"oneof(DEBUG,INFO,WARNING,ERROR,CRITICAL);INFO"`
	LogSeverityScreen string `config:"oneof(DEBUG,INFO,WARNING,ERROR,CRITICAL);INFO"`
	LogSeveritySys    string `config:"oneof(DEBUG,INFO,WARNING,ERROR,CRITICAL);INFO"`

	HealthEnabled                   bool `config:"bool;false"`
	HealthPort                      int  `config:"int(0,65535);9098"`
	PrometheusMetricsEnabled        bool `config:"bool;false"`
	PrometheusMetricsPort           int  `config:"int(0,65535);9093"`
	PrometheusGoMetricsEnabled      bool `config:"bool;true"`
	PrometheusProcessMetricsEnabled bool `config:"bool;true"`

	SnapshotCacheMaxBatchSize int `config:"int(1,);100"`

	ServerMaxMessageSize              int           `config:"int(1,);100"`
	ServerMaxFallBehindSecs           time.Duration `config:"seconds;90"`
	ServerMinBatchingAgeThresholdSecs time.Duration `config:"seconds;0.01"`
	ServerPingIntervalSecs            time.Duration `config:"seconds;10"`
	ServerPongTimeoutSecs             time.Duration `config:"seconds;60"`
	ServerPort                        int           `config:"port;0"`

	DebugMemoryProfilePath  string `config:"file;;"`
	DebugDisableLogDropping bool   `config:"bool;false"`

	ConnectionRebalancingMode  string        `config:"oneof(none,kubernetes);none"`
	ConnectionDropIntervalSecs time.Duration `config:"seconds;1"`
	MaxConnectionsUpperLimit   int           `config:"int(1,);10000"`
	MaxConnectionsLowerLimit   int           `config:"int(1,);100"`
	K8sServicePollIntervalSecs time.Duration `config:"seconds;30"`
	K8sNamespace               string        `config:"string;kube-system"`
	K8sServiceName             string        `config:"string;calico-typha"`
	K8sPortName                string        `config:"string;calico-typha"`
	// contains filtered or unexported fields
}

Config contains the best, parsed config values loaded from the various sources. We use tags to control the parsing and validation.

func New 

func New() *Config

func (*Config) DatastoreConfig 

func (config *Config) DatastoreConfig() apiconfig.CalicoAPIConfig

func (*Config) RawValues 

func (config *Config) RawValues() map[string]string

func (*Config) UpdateFrom 

func (config *Config) UpdateFrom(rawData map[string]string, source Source) (changed bool, err error)

Load parses and merges the rawData from one particular source into this config object. If there is a config value already loaded from a higher-priority source, then the new value will be ignored (after validation).

func (*Config) Validate 

func (config *Config) Validate() (err error)

Validate() performs cross-field validation.

type EndpointListParam 

type EndpointListParam struct {
	Metadata
}

func (*EndpointListParam) Parse 

func (p *EndpointListParam) Parse(raw string) (result interface{}, err error)

type FileParam 

type FileParam struct {
	Metadata
	MustExist  bool
	Executable bool
}

func (*FileParam) Parse 

func (p *FileParam) Parse(raw string) (interface{}, error)

type FloatParam 

type FloatParam struct {
	Metadata
}

func (*FloatParam) Parse 

func (p *FloatParam) Parse(raw string) (result interface{}, err error)

type Int32Param 

type Int32Param struct {
	Metadata
}

func (*Int32Param) Parse 

func (p *Int32Param) Parse(raw string) (interface{}, error)

type IntParam 

type IntParam struct {
	Metadata
	Min int
	Max int
}

func (*IntParam) Parse 

func (p *IntParam) Parse(raw string) (interface{}, error)

type Ipv4Param 

type Ipv4Param struct {
	Metadata
}

func (*Ipv4Param) Parse 

func (p *Ipv4Param) Parse(raw string) (result interface{}, err error)

type MarkBitmaskParam 

type MarkBitmaskParam struct {
	Metadata
}

func (*MarkBitmaskParam) Parse 

func (p *MarkBitmaskParam) Parse(raw string) (interface{}, error)

type Metadata 

type Metadata struct {
	Name              string
	Default           interface{}
	ZeroValue         interface{}
	NonZero           bool
	DieOnParseFailure bool
	Local             bool
}

func (*Metadata) GetMetadata 

func (m *Metadata) GetMetadata() *Metadata

type OneofListParam 

type OneofListParam struct {
	Metadata
	// contains filtered or unexported fields
}

func (*OneofListParam) Parse 

func (p *OneofListParam) Parse(raw string) (result interface{}, err error)

type PortListParam 

type PortListParam struct {
	Metadata
}

func (*PortListParam) Parse 

func (p *PortListParam) Parse(raw string) (interface{}, error)

type PortParam 

type PortParam struct {
	Metadata
}

func (*PortParam) Parse 

func (p *PortParam) Parse(raw string) (interface{}, error)

type ProtoPort 

type ProtoPort struct {
	Protocol string
	Port     uint16
}

type RegexpParam 

type RegexpParam struct {
	Metadata
	Regexp *regexp.Regexp
	Msg    string
}

func (*RegexpParam) Parse 

func (p *RegexpParam) Parse(raw string) (result interface{}, err error)

type SecondsParam 

type SecondsParam struct {
	Metadata
}

func (*SecondsParam) Parse 

func (p *SecondsParam) Parse(raw string) (result interface{}, err error)

type Source 

type Source uint8

Source of a config value. Values from higher-numbered sources override those from lower-numbered sources. Note: some parameters (such as those needed to connect to the datastore) can only be set from a local source.

func (Source) Local 

func (source Source) Local() bool

func (Source) String 

func (source Source) String() string

Source Files

View all Source files

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