# Переменные окружения { #environment-variables }

/// tip | Совет

Если вы уже знаете, что такое «переменные окружения» и как их использовать, можете пропустить это.

///

Переменная окружения (также известная как «**env var**») - это переменная, которая живет **вне** кода Python, в **операционной системе**, и может быть прочитана вашим кодом Python (или другими программами).

/// tip | Consejo

Para entender las variables de entorno, puedes leer [Variables de Entorno](../environment-variables.md){.internal-link target=_blank}.

///

## Tipos y validación { #types-and-validation }

To understand environment variables you can read [Environment Variables](../environment-variables.md){.internal-link target=_blank}.

///

## Types and validation { #types-and-validation }

These environment variables can only handle text strings, as they are external to Python and have to be compatible with other programs and the rest of the system (and even with different operating systems, as Linux, Windows, macOS).

   *
   * @param formal The type whose type variables or itself is mapped to other type(s). It's almost
   *     always a bug if {@code formal} isn't a type variable and contains no type variable. Make
   *     sure you are passing the two parameters in the right order.
   * @param actual The type that the formal type variable(s) are mapped to. It can be or contain yet

    }

    /**
     * Returns a {@link Map} where the keys are the type variables and the values are the type arguments
     * of the specified parameterized type (class or interface).
     *
     * @param clazz
     *            the parameterized type (class or interface) to analyze. Cannot be null.
     * @return a {@link Map} where the keys are the type variables and the values are the type arguments
     */

   *
   * @param formal The type whose type variables or itself is mapped to other type(s). It's almost
   *     always a bug if {@code formal} isn't a type variable and contains no type variable. Make
   *     sure you are passing the two parameters in the right order.
   * @param actual The type that the formal type variable(s) are mapped to. It can be or contain yet

func IsPresent() (bool, error) {
	// isPresent reports whether at least one of the
	// given env. variables is present.
	isPresent := func(vars ...string) bool {
		for _, v := range vars {
			if _, ok := os.LookupEnv(v); ok {
				return ok
			}
		}
		return false
	}

	// First, check which KMS/KES env. variables are present.
	// Only one set, either KMS, KES or static key must be
	// present.

export MINIO_IDENTITY_LDAP_TLS_SKIP_VERIFY=on
```

### Variable substitution in configuration strings

In the configuration variables, `%s` is substituted with the _username_ from the STS request and `%d` is substituted with the _distinguished username (user DN)_ of the LDAP user. Please see the following table for which configuration variables support these substitution variables:

| Variable                                    | Supported substitutions |

  }

  public void testConstructor_typeParameters() throws Exception {
    TypeVariable<?>[] variables = Prepender.constructor().getTypeParameters();
    assertThat(variables).hasLength(1);
    assertEquals("T", variables[0].getName());
  }

  public void testConstructor_parameters() throws Exception {

##
rootUser: ""
rootPassword: ""

## Use existing Secret that store following variables:
##
## | Chart var             | .data.<key> in Secret    |
## |:----------------------|:-------------------------|
## | rootUser              | rootUser                 |
## | rootPassword          | rootPassword             |
##
## All mentioned variables will be ignored in values file.
## .data.rootUser and .data.rootPassword are mandatory,