ZookeeperConfigOptions (Apache Hadoop YARN Registry 2.8.5 API)

All Known Implementing Classes:

MicroZookeeperService
```
public interface ZookeeperConfigOptions
```
Configuration options which are internal to Zookeeper, as well as some other ZK constants
Zookeeper options are passed via system properties prior to the ZK Methods/classes being invoked. This implies that:
1. There can only be one instance of a ZK client or service class in a single JVM —else their configuration options will conflict.
2. It is safest to set these properties immediately before invoking ZK operations.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`DEFAULT_ZK_ENABLE_SASL_CLIENT` Default flag for the ZK client: "true".
`static String`	`PROP_ZK_ALLOW_FAILED_SASL_CLIENTS` should the ZK Server Allow failed SASL clients: "zookeeper.allowSaslFailedClients".
`static String`	`PROP_ZK_ENABLE_SASL_CLIENT` Enable SASL secure clients: "zookeeper.sasl.client".
`static String`	`PROP_ZK_KINIT_PATH` Path to a kinit binary: "zookeeper.kinit".
`static String`	`PROP_ZK_SASL_CLIENT_CONTEXT` System property for the JAAS client context : "zookeeper.sasl.clientconfig".
`static String`	`PROP_ZK_SASL_CLIENT_USERNAME` The SASL client username: "zookeeper.sasl.client.username".
`static String`	`PROP_ZK_SERVER_MAINTAIN_CONNECTION_DESPITE_SASL_FAILURE` Should ZK Server allow failed SASL clients to downgrade to classic authentication on a SASL auth failure: "zookeeper.maintain_connection_despite_sasl_failure".
`static String`	`PROP_ZK_SERVER_REALM` Kerberos realm of the server: "zookeeper.server.realm".
`static String`	`PROP_ZK_SERVER_SASL_CONTEXT` The SASL Server context, referring to a context in the JVM's JAAS context file: "zookeeper.sasl.serverconfig"
`static String`	`SCHEME_DIGEST` ID scheme for digest auth: "digest".
`static String`	`SCHEME_SASL` ID scheme for SASL: "sasl".

- Field Detail
  - PROP_ZK_ENABLE_SASL_CLIENT
```
static final String PROP_ZK_ENABLE_SASL_CLIENT
```
    Enable SASL secure clients: "zookeeper.sasl.client". This is usually set to true, with ZK set to fall back to non-SASL authentication if the SASL auth fails by the property PROP_ZK_SERVER_MAINTAIN_CONNECTION_DESPITE_SASL_FAILURE.
    As a result, clients will default to attempting SASL-authentication, but revert to classic authentication/anonymous access on failure.
    
    See Also:
    Constant Field Values
  - DEFAULT_ZK_ENABLE_SASL_CLIENT
```
static final String DEFAULT_ZK_ENABLE_SASL_CLIENT
```
    Default flag for the ZK client: "true".
    
    See Also:
    Constant Field Values
  - PROP_ZK_SASL_CLIENT_CONTEXT
```
static final String PROP_ZK_SASL_CLIENT_CONTEXT
```
    System property for the JAAS client context : "zookeeper.sasl.clientconfig". For SASL authentication to work, this must point to a context within the
    Default value is derived from ZooKeeperSaslClient.LOGIN_CONTEXT_NAME_KEY
    
    See Also:
    Constant Field Values
  - PROP_ZK_SASL_CLIENT_USERNAME
```
static final String PROP_ZK_SASL_CLIENT_USERNAME
```
    The SASL client username: "zookeeper.sasl.client.username".
    Set this to the short name of the client, e.g, "user", not user/host, or user/host@REALM
    
    See Also:
    Constant Field Values
  - PROP_ZK_SERVER_SASL_CONTEXT
```
static final String PROP_ZK_SERVER_SASL_CONTEXT
```
    The SASL Server context, referring to a context in the JVM's JAAS context file: "zookeeper.sasl.serverconfig"
    
    See Also:
    Constant Field Values
  - PROP_ZK_SERVER_MAINTAIN_CONNECTION_DESPITE_SASL_FAILURE
```
static final String PROP_ZK_SERVER_MAINTAIN_CONNECTION_DESPITE_SASL_FAILURE
```
    Should ZK Server allow failed SASL clients to downgrade to classic authentication on a SASL auth failure: "zookeeper.maintain_connection_despite_sasl_failure".
    
    See Also:
    Constant Field Values
  - PROP_ZK_ALLOW_FAILED_SASL_CLIENTS
```
static final String PROP_ZK_ALLOW_FAILED_SASL_CLIENTS
```
    should the ZK Server Allow failed SASL clients: "zookeeper.allowSaslFailedClients".
    
    See Also:
    Constant Field Values
  - PROP_ZK_SERVER_REALM
```
static final String PROP_ZK_SERVER_REALM
```
    Kerberos realm of the server: "zookeeper.server.realm".
    
    See Also:
    Constant Field Values
  - PROP_ZK_KINIT_PATH
```
static final String PROP_ZK_KINIT_PATH
```
    Path to a kinit binary: "zookeeper.kinit". Defaults to "/usr/bin/kinit"
    
    See Also:
    Constant Field Values
  - SCHEME_SASL
```
static final String SCHEME_SASL
```
    ID scheme for SASL: "sasl".
    
    See Also:
    Constant Field Values
  - SCHEME_DIGEST
```
static final String SCHEME_DIGEST
```
    ID scheme for digest auth: "digest".
    
    See Also:
    Constant Field Values

Interface ZookeeperConfigOptions

Field Summary

Field Detail

PROP_ZK_ENABLE_SASL_CLIENT

DEFAULT_ZK_ENABLE_SASL_CLIENT

PROP_ZK_SASL_CLIENT_CONTEXT

PROP_ZK_SASL_CLIENT_USERNAME

PROP_ZK_SERVER_SASL_CONTEXT

PROP_ZK_SERVER_MAINTAIN_CONNECTION_DESPITE_SASL_FAILURE

PROP_ZK_ALLOW_FAILED_SASL_CLIENTS

PROP_ZK_SERVER_REALM

PROP_ZK_KINIT_PATH

SCHEME_SASL

SCHEME_DIGEST