Run dstat_graph
This requires that the :zuulrun-dstat role be previously used.
Add this to a post-run playbook to run dstat_graph to
graph data from dstat.
Use the :zuulensure-dstat-graph in a pre-run playbook to make sure
that dstat_graph is available (since it is not currently packaged in any
operating system).
The output will appear in dstat.html in the
zuul-output/logs directory.
Role Variables