traefik/cmd/healthcheck/healthcheck.go

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package healthcheck
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import (
"crypto/tls"
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"errors"
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"fmt"
"net/http"
"os"
"time"
"github.com/containous/flaeg"
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"github.com/containous/traefik/cmd"
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"github.com/containous/traefik/configuration"
)
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// NewCmd builds a new HealthCheck command
func NewCmd(traefikConfiguration *cmd.TraefikConfiguration, traefikPointersConfiguration *cmd.TraefikConfiguration) *flaeg.Command {
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return &flaeg.Command{
Name: "healthcheck",
Description: `Calls traefik /ping to check health (web provider must be enabled)`,
Config: traefikConfiguration,
DefaultPointersConfig: traefikPointersConfiguration,
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Run: runCmd(traefikConfiguration),
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Metadata: map[string]string{
"parseAllSources": "true",
},
}
}
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func runCmd(traefikConfiguration *cmd.TraefikConfiguration) func() error {
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return func() error {
traefikConfiguration.GlobalConfiguration.SetEffectiveConfiguration(traefikConfiguration.ConfigFile)
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resp, errPing := Do(traefikConfiguration.GlobalConfiguration)
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if errPing != nil {
fmt.Printf("Error calling healthcheck: %s\n", errPing)
os.Exit(1)
}
if resp.StatusCode != http.StatusOK {
fmt.Printf("Bad healthcheck status: %s\n", resp.Status)
os.Exit(1)
}
fmt.Printf("OK: %s\n", resp.Request.URL)
os.Exit(0)
return nil
}
}
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// Do try to do a healthcheck
func Do(globalConfiguration configuration.GlobalConfiguration) (*http.Response, error) {
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if globalConfiguration.Ping == nil {
return nil, errors.New("please enable `ping` to use health check")
}
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pingEntryPoint, ok := globalConfiguration.EntryPoints[globalConfiguration.Ping.EntryPoint]
if !ok {
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return nil, errors.New("missing `ping` entrypoint")
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}
client := &http.Client{Timeout: 5 * time.Second}
protocol := "http"
if pingEntryPoint.TLS != nil {
protocol = "https"
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
client.Transport = tr
}
path := "/"
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return client.Head(protocol + "://" + pingEntryPoint.Address + path + "ping")
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}