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Disable doctor logging on panic (#20847) (#20898)

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Backport #20847

If permissions are incorrect for writing to the doctor log simply disable the log file
instead of panicing.

Related #20570

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: delvh <dev.lh@web.de>
This commit is contained in:
zeripath 2022-08-24 15:04:41 +01:00 committed by GitHub
parent fbcb42488f
commit bc7a4375be
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 46 additions and 15 deletions
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55
cmd/doctor.go
View file

@ -5,6 +5,7 @@
package cmd
import (
"errors"
"fmt"
golog "log"
"os"
@ -123,6 +124,47 @@ func runRecreateTable(ctx *cli.Context) error {
})
}
func setDoctorLogger(ctx *cli.Context) {
logFile := ctx.String("log-file")
if !ctx.IsSet("log-file") {
logFile = "doctor.log"
}
colorize := log.CanColorStdout
if ctx.IsSet("color") {
colorize = ctx.Bool("color")
}
if len(logFile) == 0 {
log.NewLogger(1000, "doctor", "console", fmt.Sprintf(`{"level":"NONE","stacktracelevel":"NONE","colorize":%t}`, colorize))
return
}
defer func() {
recovered := recover()
if recovered == nil {
return
}
err, ok := recovered.(error)
if !ok {
panic(recovered)
}
if errors.Is(err, os.ErrPermission) {
fmt.Fprintf(os.Stderr, "ERROR: Unable to write logs to provided file due to permissions error: %s\n %v\n", logFile, err)
} else {
fmt.Fprintf(os.Stderr, "ERROR: Unable to write logs to provided file: %s\n %v\n", logFile, err)
}
fmt.Fprintf(os.Stderr, "WARN: Logging will be disabled\n Use `--log-file` to configure log file location\n")
log.NewLogger(1000, "doctor", "console", fmt.Sprintf(`{"level":"NONE","stacktracelevel":"NONE","colorize":%t}`, colorize))
}()
if logFile == "-" {
log.NewLogger(1000, "doctor", "console", fmt.Sprintf(`{"level":"trace","stacktracelevel":"NONE","colorize":%t}`, colorize))
} else {
log.NewLogger(1000, "doctor", "file", fmt.Sprintf(`{"filename":%q,"level":"trace","stacktracelevel":"NONE"}`, logFile))
}
}
func runDoctor(ctx *cli.Context) error {
// Silence the default loggers
log.DelNamedLogger("console")
@ -132,24 +174,13 @@ func runDoctor(ctx *cli.Context) error {
defer cancel()
// Now setup our own
logFile := ctx.String("log-file")
if !ctx.IsSet("log-file") {
logFile = "doctor.log"
}
setDoctorLogger(ctx)
colorize := log.CanColorStdout
if ctx.IsSet("color") {
colorize = ctx.Bool("color")
}
if len(logFile) == 0 {
log.NewLogger(1000, "doctor", "console", fmt.Sprintf(`{"level":"NONE","stacktracelevel":"NONE","colorize":%t}`, colorize))
} else if logFile == "-" {
log.NewLogger(1000, "doctor", "console", fmt.Sprintf(`{"level":"trace","stacktracelevel":"NONE","colorize":%t}`, colorize))
} else {
log.NewLogger(1000, "doctor", "file", fmt.Sprintf(`{"filename":%q,"level":"trace","stacktracelevel":"NONE"}`, logFile))
}
// Finally redirect the default golog to here
golog.SetFlags(0)
golog.SetPrefix("")

6
modules/log/multichannel.go
View file

@ -33,7 +33,7 @@ func newLogger(name string, buffer int64) *MultiChannelledLogger {
func (l *MultiChannelledLogger) SetLogger(name, provider, config string) error {
eventLogger, err := NewChannelledLog(l.ctx, name, provider, config, l.bufferLength)
if err != nil {
return fmt.Errorf("Failed to create sublogger (%s): %v", name, err)
return fmt.Errorf("failed to create sublogger (%s): %w", name, err)
}
l.MultiChannelledLog.DelLogger(name)
@ -41,9 +41,9 @@ func (l *MultiChannelledLogger) SetLogger(name, provider, config string) error {
err = l.MultiChannelledLog.AddLogger(eventLogger)
if err != nil {
if IsErrDuplicateName(err) {
return fmt.Errorf("Duplicate named sublogger %s %v", name, l.MultiChannelledLog.GetEventLoggerNames())
return fmt.Errorf("%w other names: %v", err, l.MultiChannelledLog.GetEventLoggerNames())
}
return fmt.Errorf("Failed to add sublogger (%s): %v", name, err)
return fmt.Errorf("failed to add sublogger (%s): %w", name, err)
}
return nil