Openstack Swift HA with HAproxy

Introduction

We used five machines for swift setup . In that, 3 machines will act as swift-proxy servers and all 5 machines will act as swift-storage nodes.

Swift with HA proxy setup

We have installed HA proxy service in all three proxy servers. The KeepAlived service will monitor the HA proxy health and assign the floating virtual IP address(192.168.1.xxx) to the high priority HA proxy server. (102 is master, 101 is slave1, 100 is slave2)

The HA Proxy will check all three proxy servers and send the request in round robin method. If one proxy server fails, it will automatically sends the request to the other two proxy servers only, until the failed proxy server is back online.

Swift Proxy Node setup

We have configured three swift proxy nodes in the public network(192.168.1.xxx) and it is connected to all the storage nodes through a private network(172.0.0.xxx).

Rings

The ring builder has created an account ring, container ring and object ring to identify the details and the location of the object file in the physical partition. It creates partition for each tenant and generates a token. The partition will set any three storage nodes as primary/replica (one primary and two replicas) and it will set two storage nodes as handoff devices.

Keystone setup


Keystone provides authentication for the swift setup. It is installed in one server only. Proxy server will refer the tenant id provided by the keystone to identify the request.


Ceilometer setup

Ceilometer is installed in one server. It connects the proxy servers through ceilometer-api and collects the inbound and outbound data metrics. It also collects the container and object information through the reseller admin user role.


Swift Storage Node setup

We have configured 5 storage nodes. Three will be primary/replica devices and two will be handoff devices. Based on the ring’s partition, the data will be stored in the primary/replica devices. If any primary/replica is failed, then the data will be stored in the handoff device and once the primary/replica is online, the handoff device will move the data to that and remove the data.


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