Add async metrics fetch for multiple piholes
parent 8d5586558c
author Galorhallen <andrea.ponte1987@gmail.com> 1640558190 +0100
committer Galorhallen <andrea.ponte1987@gmail.com> 1640821760 +0100
Add test for multiple pihole
Add async mode for multiple piholes
Fixed GitHub Actions go versions
Add test for multiple pihole
Cleanup
This commit is contained in:
Galorhallen
parent
8d5586558c
commit
7009c705bb
7 changed files with 283 additions and 59 deletions
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@ -2,6 +2,7 @@ package config
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import (
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"context"
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"errors"
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"fmt"
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"log"
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"reflect"
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@ -46,7 +47,7 @@ func getDefaultEnvConfig() *EnvConfig {
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}
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// Load method loads the configuration by using both flag or environment variables.
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func Load() (*EnvConfig, []Config) {
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func Load() (*EnvConfig, []Config, error) {
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loaders := []backend.Backend{
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env.NewBackend(),
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flags.NewBackend(),
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@ -62,7 +63,11 @@ func Load() (*EnvConfig, []Config) {
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cfg.show()
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return cfg, cfg.Split()
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if clientsConfig, err := cfg.Split(); err != nil {
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return cfg, nil, err
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} else {
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return cfg, clientsConfig, nil
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}
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}
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func (c *Config) String() string {
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@ -87,50 +92,64 @@ func (c Config) Validate() error {
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return nil
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}
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func (c EnvConfig) Split() []Config {
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result := make([]Config, 0, len(c.PIHoleHostname))
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func (c EnvConfig) Split() ([]Config, error) {
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hostsCount := len(c.PIHoleHostname)
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result := make([]Config, 0, hostsCount)
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for i, hostname := range c.PIHoleHostname {
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config := Config{
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PIHoleHostname: strings.TrimSpace(hostname),
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PIHolePort: c.PIHolePort[i],
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}
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if hasData, data := extractConfig(c.PIHoleProtocol, i); hasData {
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if len(c.PIHolePort) == 1 {
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config.PIHolePort = c.PIHolePort[0]
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} else if len(c.PIHolePort) == hostsCount {
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config.PIHolePort = c.PIHolePort[i]
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} else if len(c.PIHolePort) != 0 {
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return nil, errors.New("Wrong number of ports. Port can be empty to use default, one value to use for all hosts, or match the number of hosts")
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}
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if hasData, data, isValid := extractStringConfig(c.PIHoleProtocol, i, hostsCount); hasData {
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config.PIHoleProtocol = data
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} else if !isValid {
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return nil, errors.New("Wrong number of PIHoleProtocol. PIHoleProtocol can be empty to use default, one value to use for all hosts, or match the number of hosts")
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}
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if hasData, data := extractConfig(c.PIHoleApiToken, i); hasData {
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if hasData, data, isValid := extractStringConfig(c.PIHoleApiToken, i, hostsCount); hasData {
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config.PIHoleApiToken = data
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} else if !isValid {
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return nil, errors.New(fmt.Sprintf("Wrong number of PIHoleApiToken %d (Hosts: %d). PIHoleApiToken can be empty to use default, one value to use for all hosts, or match the number of hosts", len(c.PIHoleApiToken), hostsCount))
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}
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if hasData, data := extractConfig(c.PIHoleApiToken, i); hasData {
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config.PIHoleApiToken = data
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}
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if hasData, data := extractConfig(c.PIHolePassword, i); hasData {
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if hasData, data, isValid := extractStringConfig(c.PIHolePassword, i, hostsCount); hasData {
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config.PIHolePassword = data
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} else if !isValid {
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return nil, errors.New("Wrong number of PIHolePassword. PIHolePassword can be empty to use default, one value to use for all hosts, or match the number of hosts")
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}
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result = append(result, config)
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}
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return result
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return result, nil
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}
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func extractConfig(data []string, idx int) (bool, string) {
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func extractStringConfig(data []string, idx int, hostsCount int) (bool, string, bool) {
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if len(data) == 1 {
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v := strings.TrimSpace(data[0])
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if v != "" {
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return true, v
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return true, v, true
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}
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} else if len(data) > 1 {
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} else if len(data) == hostsCount {
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v := strings.TrimSpace(data[idx])
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if v != "" {
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return true, v
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return true, v, true
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}
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} else if len(data) != 0 { //Host count missmatch
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return false, "", false
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}
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return false, ""
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// Empty
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return false, "", true
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}
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func (c Config) hostnameURL() string {
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154
config/configuration_test.go
Normal file
154
config/configuration_test.go
Normal file
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@ -0,0 +1,154 @@
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package config
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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const (
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PIHOLE_HOSTNAME = "PIHOLE_HOSTNAME"
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PIHOLE_PORT = "PIHOLE_PORT"
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PIHOLE_API_TOKEN = "PIHOLE_API_TOKEN"
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PIHOLE_PROTOCOL = "PIHOLE_PROTOCOL"
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)
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type EnvInitiazlier func(*testing.T)
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type TestCase struct {
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Name string
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Initializer EnvInitiazlier
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}
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func TestSplitDefault(t *testing.T) {
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assert := assert.New(t)
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env := getDefaultEnvConfig()
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clientConfigs, err := env.Split()
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assert.NoError(err)
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clientConfig := clientConfigs[0]
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assert.Equal("127.0.0.1", clientConfig.PIHoleHostname)
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assert.Equal("http", clientConfig.PIHoleProtocol)
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assert.Equal(uint16(80), clientConfig.PIHolePort)
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assert.Empty(clientConfig.PIHoleApiToken)
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assert.Empty(clientConfig.PIHolePassword)
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}
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func TestSplitMultipleHostWithSameConfig(t *testing.T) {
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assert := assert.New(t)
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env := getDefaultEnvConfig()
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env.PIHoleHostname = []string{"127.0.0.1", "127.0.0.2", "127.0.0.3"}
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env.PIHoleApiToken = []string{"api-token"}
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env.PIHolePort = []uint16{8080}
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clientConfigs, err := env.Split()
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assert.NoError(err)
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assert.Len(clientConfigs, 3)
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testCases := []struct {
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Host string
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Port uint16
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Protocol string
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}{
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{
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Host: "127.0.0.1",
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Port: 8080,
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Protocol: "http",
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},
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{
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Host: "127.0.0.2",
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Port: 8080,
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Protocol: "http",
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},
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{
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Host: "127.0.0.3",
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Port: 8080,
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Protocol: "http",
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},
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}
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for i, tc := range testCases {
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t.Run(fmt.Sprintf("Test %s", tc.Host), func(t *testing.T) {
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clientConfig := clientConfigs[i]
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assert.Equal(tc.Host, clientConfig.PIHoleHostname)
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assert.Equal(tc.Protocol, clientConfig.PIHoleProtocol)
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assert.Equal(tc.Port, clientConfig.PIHolePort)
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assert.Equal("api-token", clientConfig.PIHoleApiToken)
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assert.Empty(clientConfig.PIHolePassword)
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})
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}
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}
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func TestSplitMultipleHostWithMultipleConfigs(t *testing.T) {
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assert := assert.New(t)
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env := getDefaultEnvConfig()
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env.PIHoleHostname = []string{"127.0.0.1", "127.0.0.2", "127.0.0.3"}
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env.PIHoleApiToken = []string{"api-token1", "", "api-token3"}
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env.PIHolePassword = []string{"", "password2", ""}
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env.PIHolePort = []uint16{8081, 8082, 8083}
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clientConfigs, err := env.Split()
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assert.NoError(err)
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assert.Len(clientConfigs, 3)
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testCases := []struct {
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Host string
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Port uint16
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Protocol string
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ApiToken string
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Password string
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}{
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{
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Host: "127.0.0.1",
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Port: 8081,
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Protocol: "http",
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ApiToken: "api-token1",
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Password: "",
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},
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{
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Host: "127.0.0.2",
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Port: 8082,
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Protocol: "http",
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ApiToken: "",
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Password: "password2",
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},
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{
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Host: "127.0.0.3",
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Port: 8083,
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Protocol: "http",
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ApiToken: "api-token3",
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Password: "",
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},
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}
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for i, tc := range testCases {
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t.Run(fmt.Sprintf("Test %s", tc.Host), func(t *testing.T) {
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clientConfig := clientConfigs[i]
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assert.Equal(tc.Host, clientConfig.PIHoleHostname)
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assert.Equal(tc.Protocol, clientConfig.PIHoleProtocol)
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assert.Equal(tc.Port, clientConfig.PIHolePort)
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assert.Equal(tc.ApiToken, clientConfig.PIHoleApiToken)
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assert.Equal(tc.Password, clientConfig.PIHolePassword)
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})
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}
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}
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func TestWrongParams(t *testing.T) {
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assert := assert.New(t)
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env := getDefaultEnvConfig()
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env.PIHoleHostname = []string{"127.0.0.1", "127.0.0.2", "127.0.0.3"}
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env.PIHoleApiToken = []string{"api-token1", "api-token2"}
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env.PIHolePort = []uint16{808}
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clientConfigs, err := env.Split()
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assert.Errorf(err, "Wrong number of PIHoleApiToken. PIHoleApiToken can be empty to use default, one value to use for all hosts, or match the number of hosts")
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assert.Nil(clientConfigs)
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}
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2
go.mod
2
go.mod
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@ -5,6 +5,8 @@ go 1.15
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require (
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github.com/heetch/confita v0.10.0
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github.com/prometheus/client_golang v1.11.0
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github.com/stretchr/testify v1.7.0
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github.com/xonvanetta/shutdown v0.0.3
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golang.org/x/net v0.0.0-20200625001655-4c5254603344
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golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
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)
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9
go.sum
9
go.sum
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@ -123,6 +123,8 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxv
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github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
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github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
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github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
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github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
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github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
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github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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@ -195,12 +197,15 @@ github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6Mwd
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github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
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github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
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github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
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github.com/stretchr/testify v1.6.0 h1:jlIyCplCJFULU/01vCkhKuTyc3OorI3bJFuw6obfgho=
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github.com/stretchr/testify v1.6.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
|
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github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
|
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github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
|
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github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
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@ -241,6 +246,8 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
|
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golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
|
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golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
|
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golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -292,6 +299,8 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
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gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
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gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
|
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gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
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gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
|
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gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
|
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gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
|
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gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
|
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gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
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@ -16,12 +16,38 @@ import (
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"github.com/eko/pihole-exporter/internal/metrics"
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)
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type ClientStatus byte
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const (
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MetricsCollectionInProgress ClientStatus = iota
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MetricsCollectionSuccess
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MetricsCollectionError
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MetricsCollectionTimeout
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)
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func (status ClientStatus) String() string {
|
||||
return []string{"MetricsCollectionInProgress", "MetricsCollectionSuccess", "MetricsCollectionError", "MetricsCollectionTimeout"}[status]
|
||||
}
|
||||
|
||||
type ClientChannel struct {
|
||||
Status ClientStatus
|
||||
Err error
|
||||
}
|
||||
|
||||
func (c *ClientChannel) String() string {
|
||||
if c.Err != nil {
|
||||
return fmt.Sprintf("ClientChannel<Status: %s, Err: '%s'>", c.Status, c.Err.Error())
|
||||
} else {
|
||||
return fmt.Sprintf("ClientChannel<Status: %s, Err: <nil>>", c.Status)
|
||||
}
|
||||
}
|
||||
|
||||
// Client struct is a PI-Hole client to request an instance of a PI-Hole ad blocker.
|
||||
type Client struct {
|
||||
httpClient http.Client
|
||||
interval time.Duration
|
||||
config *config.Config
|
||||
MetricRetrieved chan bool
|
||||
Status chan *ClientChannel
|
||||
}
|
||||
|
||||
// NewClient method initializes a new PI-Hole client.
|
||||
|
|
@ -41,6 +67,7 @@ func NewClient(config *config.Config) *Client {
|
|||
return http.ErrUseLastResponse
|
||||
},
|
||||
},
|
||||
Status: make(chan *ClientChannel, 1),
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -48,32 +75,24 @@ func (c *Client) String() string {
|
|||
return c.config.PIHoleHostname
|
||||
}
|
||||
|
||||
/*
|
||||
// Metrics scrapes pihole and sets them
|
||||
func (c *Client) Metrics() http.HandlerFunc {
|
||||
return func(writer http.ResponseWriter, request *http.Request) {
|
||||
stats, err := c.getStatistics()
|
||||
if err != nil {
|
||||
writer.WriteHeader(http.StatusBadRequest)
|
||||
_, _ = writer.Write([]byte(err.Error()))
|
||||
return
|
||||
}
|
||||
func (c *Client) CollectMetricsAsync(writer http.ResponseWriter, request *http.Request) {
|
||||
log.Printf("Collecting from %s", c.config.PIHoleHostname)
|
||||
if stats, err := c.getStatistics(); err == nil {
|
||||
c.setMetrics(stats)
|
||||
|
||||
log.Printf("New tick of statistics: %s", stats.ToString())
|
||||
promhttp.Handler().ServeHTTP(writer, request)
|
||||
c.Status <- &ClientChannel{Status: MetricsCollectionSuccess, Err: nil}
|
||||
log.Printf("New tick of statistics from %s: %s", c.config.PIHoleHostname, stats)
|
||||
} else {
|
||||
c.Status <- &ClientChannel{Status: MetricsCollectionError, Err: err}
|
||||
}
|
||||
}*/
|
||||
}
|
||||
|
||||
func (c *Client) CollectMetrics(writer http.ResponseWriter, request *http.Request) error {
|
||||
|
||||
stats, err := c.getStatistics()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
c.setMetrics(stats)
|
||||
|
||||
log.Printf("New tick of statistics from %s: %s", c, stats)
|
||||
log.Printf("New tick of statistics from %s: %s", c.config.PIHoleHostname, stats)
|
||||
return nil
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -22,32 +22,28 @@ type Server struct {
|
|||
// the different routes that will be used by Prometheus (metrics) or for monitoring (readiness, liveness).
|
||||
func NewServer(port uint16, clients []*pihole.Client) *Server {
|
||||
mux := http.NewServeMux()
|
||||
httpServer := &http.Server{Addr: ":" + strconv.Itoa(int(port)), Handler: mux}
|
||||
httpServer := &http.Server{
|
||||
Addr: ":" + strconv.Itoa(int(port)),
|
||||
Handler: mux,
|
||||
}
|
||||
|
||||
s := &Server{
|
||||
httpServer: httpServer,
|
||||
}
|
||||
|
||||
mux.HandleFunc("/metrics",
|
||||
func(writer http.ResponseWriter, request *http.Request) {
|
||||
errors := make([]string, 0)
|
||||
mux.HandleFunc("/metrics", func(writer http.ResponseWriter, request *http.Request) {
|
||||
log.Printf("request.Header: %v\n", request.Header)
|
||||
|
||||
for _, client := range clients {
|
||||
if err := client.CollectMetrics(writer, request); err != nil {
|
||||
errors = append(errors, err.Error())
|
||||
fmt.Printf("Error %s\n", err)
|
||||
}
|
||||
go client.CollectMetricsAsync(writer, request)
|
||||
}
|
||||
|
||||
if len(errors) == len(clients) {
|
||||
writer.WriteHeader(http.StatusBadRequest)
|
||||
body := strings.Join(errors, "\n")
|
||||
_, _ = writer.Write([]byte(body))
|
||||
for _, client := range clients {
|
||||
log.Printf("Received %s from %s\n", <-client.Status, client.GetHostname())
|
||||
}
|
||||
|
||||
promhttp.Handler().ServeHTTP(writer, request)
|
||||
},
|
||||
)
|
||||
})
|
||||
|
||||
mux.Handle("/readiness", s.readinessHandler())
|
||||
mux.Handle("/liveness", s.livenessHandler())
|
||||
|
|
@ -73,6 +69,27 @@ func (s *Server) Stop() {
|
|||
s.httpServer.Shutdown(ctx)
|
||||
}
|
||||
|
||||
func (s *Server) handleMetrics(clients []*pihole.Client) http.HandlerFunc {
|
||||
return func(writer http.ResponseWriter, request *http.Request) {
|
||||
errors := make([]string, 0)
|
||||
|
||||
for _, client := range clients {
|
||||
if err := client.CollectMetrics(writer, request); err != nil {
|
||||
errors = append(errors, err.Error())
|
||||
fmt.Printf("Error %s\n", err)
|
||||
}
|
||||
}
|
||||
|
||||
if len(errors) == len(clients) {
|
||||
writer.WriteHeader(http.StatusBadRequest)
|
||||
body := strings.Join(errors, "\n")
|
||||
_, _ = writer.Write([]byte(body))
|
||||
}
|
||||
|
||||
promhttp.Handler().ServeHTTP(writer, request)
|
||||
}
|
||||
}
|
||||
|
||||
func (s *Server) readinessHandler() http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, req *http.Request) {
|
||||
if s.isReady() {
|
||||
|
|
|
|||
6
main.go
6
main.go
|
|
@ -2,6 +2,7 @@ package main
|
|||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
|
||||
"github.com/eko/pihole-exporter/config"
|
||||
"github.com/eko/pihole-exporter/internal/metrics"
|
||||
|
|
@ -11,7 +12,10 @@ import (
|
|||
)
|
||||
|
||||
func main() {
|
||||
envConf, clientConfigs := config.Load()
|
||||
envConf, clientConfigs, err := config.Load()
|
||||
if err != nil {
|
||||
log.Fatal(err.Error())
|
||||
}
|
||||
|
||||
metrics.Init()
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue