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main.go
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main.go
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// Copyright (c) 2017 Tigera, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"os"
flag "github.com/spf13/pflag"
"github.com/dtest11/calico/kube-controllers/pkg/status"
)
// VERSION is filled out during the build process (using git describe output)
var VERSION string
// main is the main entry point into the anx controller.
func main() {
// If `-v` is passed, display the version and exit.
// Use a new flag set so as not to conflict with existing libraries which use "flag"
flagSet := flag.NewFlagSet("check-status", flag.ExitOnError)
version := flagSet.BoolP("version", "v", false, "Display version")
file := flagSet.StringP("file", "f", status.DefaultStatusFile, "File to read with status information")
checkReady := flagSet.BoolP("ready", "r", false, "Check readiness")
checkLive := flagSet.BoolP("live", "l", false, "Check liveness")
err := flagSet.Parse(os.Args[1:])
if err != nil {
fmt.Println("Failed to parse flags")
os.Exit(1)
}
if *version {
fmt.Println(VERSION)
os.Exit(0)
}
// Read the status file
if *checkReady || *checkLive {
var st *status.Status
var err error
st, err = status.ReadStatusFile(*file)
if err != nil {
fmt.Printf("Failed to read status file %s: %v\n", *file, err)
os.Exit(1)
}
// Check if all components are ready
if st.GetReadiness() {
fmt.Println("Ready")
os.Exit(0)
}
// If not ready, log the components that are not ready
fmt.Println(st.GetNotReadyConditions())
os.Exit(1)
}
fmt.Println("No command specified to check-status")
os.Exit(1)
}