func (c *Config) ensureUnitLogging() error {
loggingConfig := c.asString("logging-config")
// If the logging config hasn't been set, then look for the os environment
// variable, and failing that, get the config from loggo itself.
if loggingConfig == "" {
if environmentValue := os.Getenv(osenv.JujuLoggingConfigEnvKey); environmentValue != "" {
loggingConfig = environmentValue
} else {
loggingConfig = loggo.LoggerInfo()
}
}
levels, err := loggo.ParseConfigurationString(loggingConfig)
if err != nil {
return err
}
// If there is is no specified level for "unit", then set one.
if _, ok := levels["unit"]; !ok {
loggingConfig = loggingConfig + ";unit=DEBUG"
}
c.defined["logging-config"] = loggingConfig
return nil
}
// Validate ensures that config is a valid configuration. If old is not nil,
// it holds the previous environment configuration for consideration when
// validating changes.
func Validate(cfg, old *Config) error {
// Check that we don't have any disallowed fields.
for _, attr := range allowedWithDefaultsOnly {
if _, ok := cfg.defined[attr]; ok {
return fmt.Errorf("attribute %q is not allowed in configuration", attr)
}
}
// Check that mandatory fields are specified.
for _, attr := range mandatoryWithoutDefaults {
if _, ok := cfg.defined[attr]; !ok {
return fmt.Errorf("%s missing from environment configuration", attr)
}
}
// Check that all other fields that have been specified are non-empty,
// unless they're allowed to be empty for backward compatibility,
for attr, val := range cfg.defined {
if !isEmpty(val) {
continue
}
if !allowEmpty(attr) {
return fmt.Errorf("empty %s in environment configuration", attr)
}
}
if strings.ContainsAny(cfg.mustString("name"), "/\\") {
return fmt.Errorf("environment name contains unsafe characters")
}
// Check that the agent version parses ok if set explicitly; otherwise leave
// it alone.
if v, ok := cfg.defined["agent-version"].(string); ok {
if _, err := version.Parse(v); err != nil {
return fmt.Errorf("invalid agent version in environment configuration: %q", v)
}
}
// If the logging config is set, make sure it is valid.
if v, ok := cfg.defined["logging-config"].(string); ok {
if _, err := loggo.ParseConfigurationString(v); err != nil {
return err
}
}
// Check firewall mode.
if mode := cfg.FirewallMode(); mode != FwInstance && mode != FwGlobal {
return fmt.Errorf("invalid firewall mode in environment configuration: %q", mode)
}
caCert, caCertOK := cfg.CACert()
caKey, caKeyOK := cfg.CAPrivateKey()
if caCertOK || caKeyOK {
if err := verifyKeyPair(caCert, caKey); err != nil {
return errors.Annotate(err, "bad CA certificate/key in configuration")
}
}
// Ensure that the auth token is a set of key=value pairs.
authToken, _ := cfg.CharmStoreAuth()
validAuthToken := regexp.MustCompile(`^([^\s=]+=[^\s=]+(,\s*)?)*$`)
if !validAuthToken.MatchString(authToken) {
return fmt.Errorf("charm store auth token needs to be a set"+
" of key-value pairs, not %q", authToken)
}
// Check the immutable config values. These can't change
if old != nil {
for _, attr := range immutableAttributes {
if newv, oldv := cfg.defined[attr], old.defined[attr]; newv != oldv {
return fmt.Errorf("cannot change %s from %#v to %#v", attr, oldv, newv)
}
}
if _, oldFound := old.AgentVersion(); oldFound {
if _, newFound := cfg.AgentVersion(); !newFound {
return fmt.Errorf("cannot clear agent-version")
}
}
}
cfg.processDeprecatedAttributes()
return nil
}