// runDiagnostics performs the actual execution of diagnostics once they're built.
func runDiagnostics(logger *log.Logger, diagnostics []types.Diagnostic, warnCount int, errorCount int) (bool, error, int, int) {
for _, diagnostic := range diagnostics {
func() { // wrap diagnostic panic nicely in case of developer error
defer func() {
if r := recover(); r != nil {
errorCount += 1
stack := debug.Stack()
logger.Error("CED5001",
fmt.Sprintf("While running the %s diagnostic, a panic was encountered.\nThis is a bug in diagnostics. Error and stack trace follow: \n%s\n%s",
diagnostic.Name(), fmt.Sprintf("%v", r), stack))
}
}()
if canRun, reason := diagnostic.CanRun(); !canRun {
if reason == nil {
logger.Notice("CED5002", fmt.Sprintf("Skipping diagnostic: %s\nDescription: %s", diagnostic.Name(), diagnostic.Description()))
} else {
logger.Notice("CED5003", fmt.Sprintf("Skipping diagnostic: %s\nDescription: %s\nBecause: %s", diagnostic.Name(), diagnostic.Description(), reason.Error()))
}
return
}
logger.Notice("CED5004", fmt.Sprintf("Running diagnostic: %s\nDescription: %s", diagnostic.Name(), diagnostic.Description()))
r := diagnostic.Check()
for _, entry := range r.Logs() {
logger.LogEntry(entry)
}
warnCount += len(r.Warnings())
errorCount += len(r.Errors())
}()
}
return errorCount > 0, nil, warnCount, errorCount
}
// determineRequestedDiagnostics determines which diagnostic the user wants to run
// based on the -d list and the available diagnostics.
// returns error or diagnostic names
func determineRequestedDiagnostics(available []string, requested []string, logger *log.Logger) (error, []string) {
diagnostics := []string{}
if len(requested) == 0 { // not specified, use the available list
diagnostics = available
} else if diagnostics = sets.NewString(requested...).Intersection(sets.NewString(available...)).List(); len(diagnostics) == 0 {
logger.Error("CED6001", log.EvalTemplate("CED6001", "None of the requested diagnostics are available:\n {{.requested}}\nPlease try from the following:\n {{.available}}",
log.Hash{"requested": requested, "available": available}))
return fmt.Errorf("No requested diagnostics available"), diagnostics
} else if len(diagnostics) < len(requested) {
logger.Error("CED6002", log.EvalTemplate("CED6002", "Of the requested diagnostics:\n {{.requested}}\nonly these are available:\n {{.diagnostics}}\nThe list of all possible is:\n {{.available}}",
log.Hash{"requested": requested, "diagnostics": diagnostics, "available": available}))
return fmt.Errorf("Not all requested diagnostics are available"), diagnostics
} // else it's a valid list.
return nil, diagnostics
}
func discoverSystemdUnit(logger *log.Logger, name string) types.SystemdUnit {
unit := types.SystemdUnit{Name: name, Exists: false}
if output, err := exec.Command("systemctl", "show", name).Output(); err != nil {
logger.Error("DS1004", fmt.Sprintf("Error running `systemctl show %s`: %s\nCannot analyze systemd units.", name, err.Error()))
} else {
attr := make(map[string]string)
for _, line := range strings.Split(string(output), "\n") {
elements := strings.SplitN(line, "=", 2) // Looking for "Foo=Bar" settings
if len(elements) == 2 { // found that, record it...
attr[elements[0]] = elements[1]
}
}
if val := attr["LoadState"]; val != "loaded" {
logger.Debug("DS1005", fmt.Sprintf("systemd unit '%s' does not exist. LoadState is '%s'", name, val))
return unit // doesn't exist - leave everything blank
} else {
unit.Exists = true
}
if val := attr["UnitFileState"]; val == "enabled" {
logger.Debug("DS1006", fmt.Sprintf("systemd unit '%s' is enabled - it will start automatically at boot.", name))
unit.Enabled = true
} else {
logger.Debug("DS1007", fmt.Sprintf("systemd unit '%s' is not enabled - it does not start automatically at boot. UnitFileState is '%s'", name, val))
}
if val := attr["ActiveState"]; val == "active" {
logger.Debug("DS1008", fmt.Sprintf("systemd unit '%s' is currently running", name))
unit.Active = true
} else {
logger.Debug("DS1009", fmt.Sprintf("systemd unit '%s' is not currently running. ActiveState is '%s'; exit code was %d.", name, val, unit.ExitStatus))
}
fmt.Sscanf(attr["StatusErrno"], "%d", &unit.ExitStatus) // ignore errors...
}
return unit
}