mongodb3.0.6使用

• 启动

  mongod --dbpath=/home/data

• 带权限启动

  • 连接 mongo admin 数据库

    mongo admin

  • 增加用户

    db.createUser({user:'user',pwd:'123456',roles:[{role:'dbOwner',db:'userdb'}]})

  • 以带权限方式启动

    mongod --dbpath=/home/data --auth

  • 带权限登录

    mongo admin -u user -p 123456

• mongod 启动后在后台运行

  • --fork 参数 ，必须指定日志 --logpath=文件，--logappend 用户日志文件向后追加
    mongod --dbpath=/home/data --logappend --logpath=/home/log/mongod.log --fork

  • fork 后台运行如何关闭

    kill - 9 pid 或 进入 admin --> use admin --> db.shutdownServer();

• 推荐 windows 查看 mongodb 管理工具 robomongo,mongoVUE

• 开启权限后出现问题

  1. sping boot 连接不上
  2. mongodb 管理工具也连接不上
  3. mongo admin -u user -p 123456 可以连接

原因是：mongodb 3 后默认使用了 SCRAM-SHA-1 加密方式

解决方法:

修改数据库认证方式

      *  关闭mongo服务，然后以未认证形式启动
      
      *  修改system.version文档里面的authSchema版本为3，初始安装时候应该是5
          
          > ` use admin `
          > switched to db admin
          > var schema = db.system.version.findOne({"_id" : "authSchema"}) 
          > schema.currentVersion = 3 
          > db.system.version.save(schema) 
      	  > WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })   
                              
      *  原来创建的用户已经使用了SCRAM-SHA-1认证方式,需要删除后再新建
      
         >  db.dropUser("user")
         >  true
         >  db.createUser({user:'user',pwd:'123456',roles:[{role:'dbOwner',db:'userdb'}]})
         
      * 叁考 http://21jhf.iteye.com/blog/2216103

修改代码方式（但是数据库管理工具还是连不上）

• spring boot 配置叁考： http://zjumty.iteye.com/blog/2198432?utm_source=tuicool

主要是两个类 ,一个 MongoDBConfiguration

	@Configuration
	@EnableConfigurationProperties(MongoProperties.class)
	public class MongoDBConfiguration {

	@Autowired
	private MongoProperties properties;
	@Autowired(required = false)
	private MongoClientOptions options;
	private Mongo mongo;
	@PreDestroy
	public void close() {
    	if (this.mongo != null) {
        	this.mongo.close();
    	}
	}
	@Bean
	public Mongo mongo() throws UnknownHostException {
    	this.mongo = mongoClient();
    	return this.mongo;
	}

	public MongoClient mongoClient() throws UnknownHostException{
    	return this.properties.createMongoClient(this.options);
	}
	@Bean
	public MongoDbFactory mongoDbFactory() throws Exception {
    	return new SimpleMongoDbFactory(mongoClient(),"gsiao");
	}
	}
    
 和修改MongoProperties源码后的类，在项目下新建类org.springframework.boot.autoconfigure.mongo.MongoProperties覆盖，
 主要改地方是
 
 	public MongoClient createMongoClient(MongoClientOptions options)
        throws UnknownHostException {
    	try {
        if (hasCustomAddress() || hasCustomCredentials()) {
            if (options == null) {
                options = MongoClientOptions.builder().build();
            }
            List<MongoCredential> credentials = null;
            if (hasCustomCredentials()) {
                String database = this.authenticationDatabase == null ? getMongoClientDatabase()
                        : this.authenticationDatabase;
                credentials = Arrays.asList(MongoCredential.createScramSha1Credential(
                        this.username, database, this.password));
            }
            String host = this.host == null ? "localhost" : this.host;
            int port = this.port == null ? DEFAULT_PORT : this.port;
            return new MongoClient(Arrays.asList(new ServerAddress(host, port)),
                    credentials, options);
        }
        // The options and credentials are in the URI
        return new MongoClient(new MongoClientURI(this.uri, builder(options)));
    	}
    	finally {
        	clearPassword();
    	}
	}