"Linux" "Services" "Openstack" Installation and Deployment (2. Message Queuing)

1. Introduction

1.1. Official website: https://www.rabbitmq.com/

2. Installation and configuration:

See: Https://docs.openstack.org/ha-guide/shared-messaging.html#rabbitmq-configure

2.1. Install: Do it on each node

Installed directly with Yum, the installation package is available in OpenStack's Yum source

Yum Install Rabbitmq-server

Start Service (Confirm cookie file has been generated)

[Email protected] ~]# systemctl start rabbitmq-~]# ll/var/lib/rabbitmq/. Erlang.cookie1   6: xx /var/lib/rabbitmq/

Create user

#前面的openstack是用户名, the back of OpenStack is the password rabbitmqctl add_user OpenStack OpenStack

Creating user "OpenStack" ...

assigning permissions

" .* " " .* " " .* "  for "openstack"in"/"  ...

Stop RABBITMQ

Systemctl Stop Rabbitmq-server

2.2. Configuration

On node 01, SCP the cookie file to a further two nodes

SCP /var/lib/rabbitmq/.erlang.cookie [email protected]:/var/lib/rabbitmq/. Erlang.cookieSCP /var/lib/rabbitmq/.erlang.cookie [Email Protected]:/var/lib/rabbitmq/.erlang.cookie

Modify permissions on node 02/03, respectively

chown rabbitmq:rabbitmq/var/lib/rabbitmq/chmod /var/lib/rabbitmq/. Erlang.cookie

Start the Service on node 01 and view the cluster status

[Email protected] ~]# systemctl start rabbitmq-~]# rabbitmqctl cluster_statuscluster Status of node [email p Rotected] ... [{Nodes,[{disc,[[email protected]}]}, {Running_nodes,[[email protected]}, {cluster_name,<< [email protected] ">>}, {partitions,[]}, {Alarms,[{[email protected],[]}]}]

Start the service on nodes 02 and 03, stop the native service, join the 01 cluster (after successfully joining, start the service without executing Stop_app)

 [[email protected] ~]# systemctl start Rabbitmq-server[[email  Protected]  ~]# rabbitmqctl stop_appstopping node [email protected] ... [[email protected]  ~]# rabbitmqctl join_cluster--ram [email  protected]clustering node [email protected] with [email protected] ...   
  

[[email protected] ~]# systemctl stop rabbitmq-chown rabbitmq:rabbitmq/var/lib/rabbitmq/  chmod  /var/lib/rabbitmq/~]# systemctl start rabbitmq-~~]# rabbitmqctl join_cluster --RAM [email protected]clustering node [email protected] with [email protected] ...

viewing status on a 01 node

[Email protected] ~]# rabbitmqctl cluster_statuscluster Status of node [email protected] ... [{Nodes,[{disc,[[email protected]},         {ram,[[email protected],[email protected]}]}, {Running_nodes,[[email Protected],[email protected],                 [email protected]}, {cluster_name,<<"[email protected]  ">>}, {partitions,[]}, {Alarms,[{[email protected],[]},          {[email protected],[]},          {[ Email protected],[]}]}

Must ensure that you can see three nodes, I in the configuration process occurred the following error, multiple restarts several times better, and then come back to study it

[Email protected] ~]# rabbitmqctl join_cluster-ram [email protected]clustering node [email protected] with [email p Rotected] ... Error: {inconsistent_cluster,"Node [email protected] thinks it ' s clustered with Node [email protected] , but [email protected] disagrees"}

Configure HA mode, I do not quite understand the official document meaning, but it seems that this configuration can implement the HA mode, the message can be mirrored to other nodes

' ^(?! Amq\.). *'{' ha-mode ': ' All '}'

"Linux" "Services" "Openstack" Installation and Deployment (2. Message Queuing)