Remote Connection RABBITMQ failed

To avoid contaminating the host system environment, a Linux environment was built in the virtual machine and followed rabbitmq-server . Then the connection fails at the remote connection.

The examples given on the official website are local users connected using the system default guest . Without giving an example of a remote connection, read the document discovery:

When the server first starts running, and detects the IT database is uninitialised or have been deleted, it initialises a Fresh database with the following resources:

A virtual host named/
A user named guest with a default password of guest, granted full access to the/virtual host.

That is, the rabbitmq-server system automatically creates a virtual host named "/" and creates a user with a user name and password guest , and applies all access rights of "/virtual host".

So use the official website example on the RABBITMQ installed machine:

Import Com.rabbitmq.client.ConnectionFactory;Import com.rabbitmq.client.Connection;Import Com.rabbitmq.client.Channel;PublicClassSend {PrivateFinalstatic String queue_name ="Hello";PublicStaticvoid main (String[] argv) throws Exception {connectionfactory factory = new connectionfactory (); Factory.sethost ( "localhost"); Connection Connection = Factory.newconnection (); Channel channel = Connection.createchannel (); Channel.queuedeclare (queue_name, false, false, false, null); String message =  "Hello world!"; Channel.basicpublish (null, Message.getbytes ()); System.out.println ( "[x] Sent '" + message +  "'"); Channel.close (); Connection.close (); }}

The operation is no problem. If you want to switch to remote machine access, simply modify the

    factory.setHost("localhost");

It's not going to work.

Because guest the user is only allowed to localhost access from. The official documents are described below:

"Guest" user can only connect via localhost

By default, the guest user was prohibited from connecting to the broker remotely; It can only connect over a > loopback interface (i.e. localhost). This applies both to AMQP and to any other protocols enabled via plugins. Any > Other users you create won't (by default) is restricted in the this.

This was configured via the Loopback_users item in the configuration file.

If you wish the guest user to connect from a remote host, you should set the Loopback_users configuration item to []. A complete Rabbitmq.config which does this would look like:

[{rabbit, [{loopback_users, []}]}].

By default, the following command is used:

sudo rabbitmqctl environment

Will find:

  {default_permissions,[<<".*">>,<<".*">>,<<".*">>]},  {default_user,<<"guest">>},  {default_user_tags,[administrator]},  {default_vhost,<<"/">>},  {loopback_users,[<<"guest">>]},  {tcp_listeners,[5672]},

I'm not going to use the default guest user, I've created a new user rollen , and then granted all the permissions, use the following command:

set_user_tags rollen administratorrabbitmqctl set_permissions -p / rollen ".*" ".*" ".*"

Then use the following code to remotely access

Package com.rollenholt.rabbitmq.example1;Import Com.rabbitmq.client.Channel;Import com.rabbitmq.client.Connection;Import Com.rabbitmq.client.ConnectionFactory;PublicClassSend {PrivateFinalstatic String queue_name ="Hello";PublicStaticvoidMain(string[] argv)Throws Exception {ConnectionFactory factory =new ConnectionFactory (); Factory.sethost ("192.168.126.131"); Factory.setusername ("Rollen"); Factory.setpassword ("root"); Factory.setport (5672); Connection Connection = Factory.newconnection (); Channel channel = Connection.createchannel (); Channel.queuedeclare (Queue_name, false, false, false, null); String message = "Hello world!"; Channel.basicpublish ("", queue_name, null, message.getbytes ()); System.out.println ("[x] Sent '" + Message + "'"); Channel.close (); Connection.close (); }}

Reference documents

• Http://www.rabbitmq.com/access-control.html

Remote Connection RABBITMQ failed