Collecting usage statistics – OpenStack Cloud

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OpenStack Object Storage can report on usage metrics by using the swift-recon middleware added to our object -server configuration. By using a tool, also named swift-recon, we can then query these collected metrics.

Getting started

Log in to an OpenStack Object Storage node as well as the proxy server.

How to achieve it…

To collect usage statistics from our OpenStack Object Storage cluster, carry out the following steps:

  • We first need to modify our /etc/swift/object-server.conf configuration file to include the swift-recon middleware, so that it looks similar to the following:
bind_ip = 
workers = 2
pipeline = recon object-server
use = egg:swift#object
use = egg:swift#recon 
recon_cache_path = /var/cache/swift
  • Once this is in place, we simply restart our object-server service, using swift-init, as follows:
swift-init object-server restart

Now that the command is running, we can use the swift-recon tool on the proxy server to get usage statistics, as follows:

Disk usage

swift-recon -d

This will report on disk usage in our cluster.

swift-recon -d -z5

This will report on disk usage in zone 5.

Load average

swift-recon -l

This will report on, the load average in our cluster.

swift-recon -l -z5

This will report on load average of the nodes in zone 5.

Quarantined statistics

swift-recon -q

This will report on any quarantined containers, objects, and accounts in the cluster.

swift-recon -q -z5

This will report on this information just for zone 5.

Check for unmounted devices

swift-recon -u

This will check for any unmounted drives in our cluster.

swift-recon -z5 -u

This will do the same just for zone 5.

Check replication metrics

swift-recon -r

This will report on the replication status within our cluster.

swift-recon -r -z5

This will just perform this for nodes in zone 5.

We can perform all these actions with a single command to get all telemetry data back about our cluster, as follows:

swift-recon --all

We can just get this information for nodes within zone 5 by adding -z5 at the end, as follows:

swift-recon --all -z5

How it works…

To enable usage statistics within an OpenStack Object Storage, we add in the swift-recon middleware, so metrics are collected. We add this to the object server by adding the following lines to /etc/swift/object-server.conf, on each of our storage nodes:

pipeline = recon object-server
use = egg:swift#recon 
recon_cache_path = /var/cache/swift

With this in place and our object servers restarted, we can query this telemetry data by using the swift-recon tool. We can collect the statistics from the cluster as a whole, or from specific zones with the -z parameter.

Note that we can also collect all or multiple statistics by specifying the –all flag or appending multiple flags to the command line. For example, to collect a load average and replication statistics from our nodes in zone 5, we would execute the following command:

swift-recon -r -l -z5


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