diff --git a/cmd/server/main.go b/cmd/server/main.go index 63733cc..61e6d5f 100644 --- a/cmd/server/main.go +++ b/cmd/server/main.go @@ -2,9 +2,12 @@ package main import ( "context" + "flag" "fmt" "net/http" + "os" + "git.faercol.me/monitoring/sys-exporter/config" "git.faercol.me/monitoring/sys-exporter/registry" "github.com/prometheus/client_golang/prometheus/promhttp" @@ -15,6 +18,8 @@ import ( _ "git.faercol.me/monitoring/sys-exporter/collector/uptime" ) +var confFileLocation string + // type gatherer struct { // reg *prometheus.Registry // } @@ -24,10 +29,27 @@ import ( // } func main() { - fmt.Println("starting server") + flag.Parse() + conf, err := config.New(confFileLocation) + if err != nil { + fmt.Fprintf(os.Stderr, "Failed to open configuration: %s\n", err) + os.Exit(1) + } + + logger, err := conf.ZapConfig().Build() + if err != nil { + fmt.Fprintf(os.Stderr, "Failed to init logger: %s\n", err) + os.Exit(1) + } + + logger.Info("Starting server") registry.R.Run(context.Background()) http.Handle("/metrics", promhttp.HandlerFor(registry.R.PromRegistry(), promhttp.HandlerOpts{})) http.ListenAndServe(":2112", nil) } + +func init() { + flag.StringVar(&confFileLocation, "config", config.DefaultConfigFileLocation, "Location of the config file") +} diff --git a/config/config.go b/config/config.go new file mode 100644 index 0000000..55a9bea --- /dev/null +++ b/config/config.go @@ -0,0 +1,82 @@ +package config + +import ( + "fmt" + "os" + + "github.com/goccy/go-yaml" + "go.uber.org/zap" + "go.uber.org/zap/zapcore" +) + +const DefaultConfigFileLocation = "/etc/sys-exporter/config.yml" + +type logConfigJson struct { + Level string `yaml:"level"` +} + +func (c logConfigJson) logConfig() (LogConfig, error) { + lvl, err := zap.ParseAtomicLevel(c.Level) + if err != nil { + return LogConfig{}, err + } + return LogConfig{ + Level: lvl, + }, nil +} + +type appConfigJson struct { + LogConfig logConfigJson `yaml:"logging"` +} + +func (c appConfigJson) appConfig() (AppConfig, error) { + lc, err := c.LogConfig.logConfig() + if err != nil { + return AppConfig{}, err + } + + return AppConfig{ + LogConfig: lc, + }, nil +} + +type LogConfig struct { + Level zap.AtomicLevel `yaml:"level"` +} + +func (c *LogConfig) ZapConfig() zap.Config { + fmt.Println(c.Level) + zapC := zap.Config{ + Level: c.Level, + Development: true, // TODO: remove later + Encoding: "console", + EncoderConfig: zap.NewDevelopmentEncoderConfig(), + OutputPaths: []string{"stdout"}, + ErrorOutputPaths: []string{"stderr"}, + } + + zapC.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder + + return zapC +} + +type AppConfig struct { + LogConfig `yaml:"logging"` +} + +func New(filepath string) (*AppConfig, error) { + fileContent, err := os.ReadFile(filepath) + if err != nil { + return nil, fmt.Errorf("failed to open config file: %w", err) + } + + var v appConfigJson + if err := yaml.Unmarshal(fileContent, &v); err != nil { + return nil, fmt.Errorf("failed to parse config file: %w", err) + } + trueConf, err := v.appConfig() + if err != nil { + return nil, fmt.Errorf("failed to validate config: %w", err) + } + return &trueConf, nil +} diff --git a/go.mod b/go.mod index a64dbd0..a754a9b 100644 --- a/go.mod +++ b/go.mod @@ -2,7 +2,11 @@ module git.faercol.me/monitoring/sys-exporter go 1.23.3 -require github.com/prometheus/client_golang v1.20.5 +require ( + github.com/goccy/go-yaml v1.15.6 + github.com/prometheus/client_golang v1.20.5 + go.uber.org/zap v1.27.0 +) require ( github.com/beorn7/perks v1.0.1 // indirect @@ -12,6 +16,7 @@ require ( github.com/prometheus/client_model v0.6.1 // indirect github.com/prometheus/common v0.55.0 // indirect github.com/prometheus/procfs v0.15.1 // indirect + go.uber.org/multierr v1.10.0 // indirect golang.org/x/sys v0.22.0 // indirect google.golang.org/protobuf v1.34.2 // indirect ) diff --git a/go.sum b/go.sum index d5318cf..d180334 100644 --- a/go.sum +++ b/go.sum @@ -2,6 +2,10 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/goccy/go-yaml v1.15.6 h1:gy5kf1yjMia3/c3wWD+u1z3lU5XlhpT8FZGaLJU9cOA= +github.com/goccy/go-yaml v1.15.6/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA= github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI= github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA= @@ -10,6 +14,8 @@ github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw= github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA= github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y= github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE= github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E= @@ -18,7 +24,17 @@ github.com/prometheus/common v0.55.0 h1:KEi6DK7lXW/m7Ig5i47x0vRzuBsHuvJdi5ee6Y3G github.com/prometheus/common v0.55.0/go.mod h1:2SECS4xJG1kd8XF9IcM1gMX6510RAEL65zxzNImwdc8= github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc= github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk= +github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg= +github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY= +go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto= +go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE= +go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ= +go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y= +go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8= +go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E= golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI= golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg= google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=