config

package
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 Go to latest Published: Aug 9, 2019 License: Apache-2.0 Imports: 20 Imported by: 0

Documentation

Overview

The config package provides config inheritance for Felix.

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: 

config.UpdateFrom(envConfig, config.EnvironmentVariable)
config.UpdateFrom(fileConfig, config.ConfigFile)

The UpdateFrom() method returns an error, but, as a convenience, it also stores the error in config.Err.

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 (
	// RegexpIfaceElemRegexp matches an individual element in the overall interface list;
	// assumes the value represents a regular expression and is marked by '/' at the start
	// and end and cannot have spaces
	RegexpIfaceElemRegexp = regexp.MustCompile(`^\/[^\s]+\/$`)
	// NonRegexpIfaceElemRegexp matches an individual element in the overall interface list;
	// assumes the value is between 1-15 chars long and only be alphanumeric or - or _
	NonRegexpIfaceElemRegexp = regexp.MustCompile(`^[a-zA-Z0-9_-]{1,15}$`)
	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_.-]+$`)
	StringRegexp             = regexp.MustCompile(`^.*$`)
	IfaceParamRegexp         = regexp.MustCompile(`^[a-zA-Z0-9:._+-]{1,15}$`)
)
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 "felix_") from the given OS environment variables. An environment entry of "FELIX_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 CIDRListParam 

type CIDRListParam struct {
	Metadata
}

func (*CIDRListParam) Parse 

func (c *CIDRListParam) Parse(raw string) (result interface{}, err error)

type Config 

type Config struct {
	// Configuration parameters.
	UseInternalDataplaneDriver bool   `config:"bool;true"`
	DataplaneDriver            string `config:"file(must-exist,executable);calico-iptables-plugin;non-zero,die-on-fail,skip-default-validation"`

	DatastoreType string `config:"oneof(kubernetes,etcdv3);etcdv3;non-zero,die-on-fail,local"`

	FelixHostname string `config:"hostname;;local,non-zero"`

	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"`

	TyphaAddr           string        `config:"authority;;local"`
	TyphaK8sServiceName string        `config:"string;;local"`
	TyphaK8sNamespace   string        `config:"string;kube-system;non-zero,local"`
	TyphaReadTimeout    time.Duration `config:"seconds;30;local"`
	TyphaWriteTimeout   time.Duration `config:"seconds;10;local"`

	// Client-side TLS config for Felix's communication with Typha.  If any of these are
	// specified, they _all_ must be - except that either TyphaCN or TyphaURISAN may be left
	// unset.  Felix will then initiate a secure (TLS) connection to Typha.  Typha must present
	// a certificate signed by a CA in TyphaCAFile, and with CN matching TyphaCN or URI SAN
	// matching TyphaURISAN.
	TyphaKeyFile  string `config:"file(must-exist);;local"`
	TyphaCertFile string `config:"file(must-exist);;local"`
	TyphaCAFile   string `config:"file(must-exist);;local"`
	TyphaCN       string `config:"string;;local"`
	TyphaURISAN   string `config:"string;;local"`

	Ipv6Support    bool `config:"bool;true"`
	IgnoreLooseRPF bool `config:"bool;false"`

	RouteRefreshInterval               time.Duration `config:"seconds;90"`
	IptablesRefreshInterval            time.Duration `config:"seconds;90"`
	IptablesPostWriteCheckIntervalSecs time.Duration `config:"seconds;1"`
	IptablesLockFilePath               string        `config:"file;/run/xtables.lock"`
	IptablesLockTimeoutSecs            time.Duration `config:"seconds;0"`
	IptablesLockProbeIntervalMillis    time.Duration `config:"millis;50"`
	IpsetsRefreshInterval              time.Duration `config:"seconds;10"`
	MaxIpsetSize                       int           `config:"int;1048576;non-zero"`
	XDPRefreshInterval                 time.Duration `config:"seconds;90"`

	PolicySyncPathPrefix string `config:"file;;"`

	NetlinkTimeoutSecs time.Duration `config:"seconds;10"`

	MetadataAddr string `config:"hostname;127.0.0.1;die-on-fail"`
	MetadataPort int    `config:"int(0,65535);8775;die-on-fail"`

	OpenstackRegion string `config:"region;;die-on-fail"`

	InterfacePrefix  string           `config:"iface-list;cali;non-zero,die-on-fail"`
	InterfaceExclude []*regexp.Regexp `config:"iface-list-regexp;kube-ipvs0"`

	ChainInsertMode             string `config:"oneof(insert,append);insert;non-zero,die-on-fail"`
	DefaultEndpointToHostAction string `config:"oneof(DROP,RETURN,ACCEPT);DROP;non-zero,die-on-fail"`
	IptablesFilterAllowAction   string `config:"oneof(ACCEPT,RETURN);ACCEPT;non-zero,die-on-fail"`
	IptablesMangleAllowAction   string `config:"oneof(ACCEPT,RETURN);ACCEPT;non-zero,die-on-fail"`
	LogPrefix                   string `config:"string;calico-packet"`

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

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

	VXLANEnabled        bool   `config:"bool;false"`
	VXLANPort           int    `config:"int;4789"`
	VXLANVNI            int    `config:"int;4096"`
	VXLANMTU            int    `config:"int;1410;non-zero"`
	IPv4VXLANTunnelAddr net.IP `config:"ipv4;"`

	IpInIpEnabled    bool   `config:"bool;false"`
	IpInIpMtu        int    `config:"int;1440;non-zero"`
	IpInIpTunnelAddr net.IP `config:"ipv4;"`

	ReportingIntervalSecs time.Duration `config:"seconds;30"`
	ReportingTTLSecs      time.Duration `config:"seconds;90"`

	EndpointReportingEnabled   bool          `config:"bool;false"`
	EndpointReportingDelaySecs time.Duration `config:"seconds;1"`

	IptablesMarkMask uint32 `config:"mark-bitmask;0xffff0000;non-zero,die-on-fail"`

	DisableConntrackInvalidCheck bool `config:"bool;false"`

	HealthEnabled                   bool   `config:"bool;false"`
	HealthPort                      int    `config:"int(0,65535);9099"`
	HealthHost                      string `config:"string;localhost"`
	PrometheusMetricsEnabled        bool   `config:"bool;false"`
	PrometheusMetricsPort           int    `config:"int(0,65535);9091"`
	PrometheusGoMetricsEnabled      bool   `config:"bool;true"`
	PrometheusProcessMetricsEnabled bool   `config:"bool;true"`

	FailsafeInboundHostPorts  []ProtoPort `config:"port-list;tcp:22,udp:68,tcp:179,tcp:2379,tcp:2380,tcp:6666,tcp:6667;die-on-fail"`
	FailsafeOutboundHostPorts []ProtoPort `config:"port-list;udp:53,udp:67,tcp:179,tcp:2379,tcp:2380,tcp:6666,tcp:6667;die-on-fail"`

	KubeNodePortRanges []numorstring.Port `config:"portrange-list;30000:32767"`
	NATPortRange       numorstring.Port   `config:"portrange;"`

	UsageReportingEnabled          bool          `config:"bool;true"`
	UsageReportingInitialDelaySecs time.Duration `config:"seconds;300"`
	UsageReportingIntervalSecs     time.Duration `config:"seconds;86400"`
	ClusterGUID                    string        `config:"string;baddecaf"`
	ClusterType                    string        `config:"string;"`
	CalicoVersion                  string        `config:"string;"`

	ExternalNodesCIDRList []string `config:"cidr-list;;die-on-fail"`

	DebugMemoryProfilePath          string        `config:"file;;"`
	DebugCPUProfilePath             string        `config:"file;/tmp/felix-cpu-<timestamp>.pprof;"`
	DebugDisableLogDropping         bool          `config:"bool;false"`
	DebugSimulateCalcGraphHangAfter time.Duration `config:"seconds;0"`
	DebugSimulateDataplaneHangAfter time.Duration `config:"seconds;0"`

	Err error

	IptablesNATOutgoingInterfaceFilter string `config:"iface-param;"`

	XDPEnabled        bool `config:"bool;false"`
	GenericXDPEnabled bool `config:"bool;false"`
	// 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) InterfacePrefixes 

func (c *Config) InterfacePrefixes() []string

func (*Config) OpenstackActive 

func (config *Config) OpenstackActive() bool

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 MillisParam 

type MillisParam struct {
	Metadata
}

func (*MillisParam) Parse 

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

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 PortRangeListParam 

type PortRangeListParam struct {
	Metadata
}

func (*PortRangeListParam) Parse 

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

type PortRangeParam 

type PortRangeParam struct {
	Metadata
}

func (*PortRangeParam) Parse 

func (p *PortRangeParam) 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 RegexpPatternListParam 

type RegexpPatternListParam struct {
	Metadata
	RegexpElemRegexp    *regexp.Regexp
	NonRegexpElemRegexp *regexp.Regexp
	Delimiter           string
	Msg                 string
}

RegexpPatternListParam differs from RegexpParam (above) in that it validates string values that are (themselves) regular expressions.

func (*RegexpPatternListParam) Parse 

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

Parse validates whether the given raw string contains a list of valid values. Validation is dictated by two regexp patterns: one for valid regular expression values, another for non-regular expressions.

type RegionParam 

type RegionParam struct {
	Metadata
}

func (*RegionParam) Parse 

func (r *RegionParam) 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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