83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controller
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"strconv"
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"strings"
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"github.com/ncabatoff/process-exporter/proc"
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"github.com/pkg/errors"
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"k8s.io/ingress-nginx/internal/nginx"
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)
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// Name returns the healthcheck name
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func (n NGINXController) Name() string {
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return "nginx-ingress-controller"
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}
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// Check returns if the nginx healthz endpoint is returning ok (status code 200)
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func (n *NGINXController) Check(_ *http.Request) error {
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if n.isShuttingDown {
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return fmt.Errorf("the ingress controller is shutting down")
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}
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// check the nginx master process is running
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fs, err := proc.NewFS("/proc", false)
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if err != nil {
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return errors.Wrap(err, "reading /proc directory")
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}
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f, err := ioutil.ReadFile(nginx.PID)
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if err != nil {
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return errors.Wrapf(err, "reading %v", nginx.PID)
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}
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pid, err := strconv.Atoi(strings.TrimRight(string(f), "\r\n"))
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if err != nil {
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return errors.Wrapf(err, "reading NGINX PID from file %v", nginx.PID)
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}
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_, err = fs.NewProc(pid)
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if err != nil {
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return errors.Wrapf(err, "checking for NGINX process with PID %v", pid)
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}
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statusCode, _, err := nginx.NewGetStatusRequest(nginx.HealthPath)
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if err != nil {
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return errors.Wrapf(err, "checking if NGINX is running")
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}
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if statusCode != 200 {
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return fmt.Errorf("ingress controller is not healthy (%v)", statusCode)
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}
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statusCode, _, err = nginx.NewGetStatusRequest("/is-dynamic-lb-initialized")
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if err != nil {
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return errors.Wrapf(err, "checking if the dynamic load balancer started")
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}
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if statusCode != 200 {
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return fmt.Errorf("dynamic load balancer not started")
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}
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return nil
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}
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