16b159c12b
Includes checks for verifying services exist and are enabled, ports are open, directories do not exist or are empty, and required binaries are in the path. Checks that user running kubeamd init and join is root and will only execute command if user is root. Moved away from using kubectl error handling to having kubeadm handle its own errors. This should allow kubeadm to have more meaningful errors, exit codes, and logging for specific kubeadm use cases.
93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
/*
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Copyright 2014 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 util
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import (
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"fmt"
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"os"
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"strings"
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"k8s.io/kubernetes/cmd/kubeadm/app/preflight"
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"github.com/golang/glog"
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"github.com/renstrom/dedent"
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)
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const (
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DefaultErrorExitCode = 1
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PreFlight = 2
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)
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var AlphaWarningOnExit = dedent.Dedent(`
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kubeadm: I am an alpha version, my authors welcome your feedback and bug reports
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kubeadm: please create issue an using https://github.com/kubernetes/kubernetes/issues/new
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kubeadm: and make sure to mention @kubernetes/sig-cluster-lifecycle. Thank you!
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`)
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type debugError interface {
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DebugError() (msg string, args []interface{})
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}
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var fatalErrHandler = fatal
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// BehaviorOnFatal allows you to override the default behavior when a fatal
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// error occurs, which is to call os.Exit(code). You can pass 'panic' as a function
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// here if you prefer the panic() over os.Exit(1).
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func BehaviorOnFatal(f func(string, int)) {
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fatalErrHandler = f
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}
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// fatal prints the message if set and then exits. If V(2) or greater, glog.Fatal
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// is invoked for extended information.
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func fatal(msg string, code int) {
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if len(msg) > 0 {
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// add newline if needed
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if !strings.HasSuffix(msg, "\n") {
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msg += "\n"
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}
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if glog.V(2) {
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glog.FatalDepth(2, msg)
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}
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fmt.Fprint(os.Stderr, msg)
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}
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os.Exit(code)
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}
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// CheckErr prints a user friendly error to STDERR and exits with a non-zero
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// exit code. Unrecognized errors will be printed with an "error: " prefix.
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//
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// This method is generic to the command in use and may be used by non-Kubectl
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// commands.
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func CheckErr(err error) {
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checkErr("", err, fatalErrHandler)
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}
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// checkErr formats a given error as a string and calls the passed handleErr
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// func with that string and an kubectl exit code.
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func checkErr(prefix string, err error, handleErr func(string, int)) {
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switch err.(type) {
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case nil:
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return
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case *preflight.PreFlightError:
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handleErr(err.Error(), PreFlight)
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default:
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fmt.Printf(AlphaWarningOnExit)
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handleErr(err.Error(), DefaultErrorExitCode)
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}
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}
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