As a front-end webdev
I would like visibility of which browsers are in use
So that I can convince my product owner to stop supporting crap browsers or devices

As a front-end webdev
I would like to see exceptions that are logged from my code
So that I can fix bugs

As a front-end webdev
I would like to know the performance of my our site from remote locations.
So that we can figure out how to optimise it.

As a back-end webdev
I would like to be able to instrument my code and visualise the data
So that I can see which parts need work

As a back-end webdev
I would like to know that all backend systems are operational.
So that I can be happy my application is functional

As a back-end webdev
I would like to be able to see all the logging related to a given web session
So that I can trace the path through the backend systems.

As a product owner
I would like visibility of the dashboards that my team use to ascertain site health
So that I can also be happy that the site is performant

As a product owner
I would like to know that end-users are happy
So that I can dance for joy

As a product owner
I would like to see that key functionality of my site is used
So that I can be aware of trends in usability.

As a security analyst
I would like the data in the logging system to be encrypted at rest and in transit
So that we do not leak information

As a security analyst
I would like access to the data in the logging system to be authenticated and recorded.
So that we have awareness of who can view it and when they do.

As a security analyst
I would like to be able to view activity on all systems
So that I can be aware of intrusions and unauthorised access.

As a security analyst
I would like the time on all log messages to be accurate to the millisecond and in UTC.
So that I can plot the timeline of events accurately.

As a webop
I would like to my metrics retrieval system to be reliable
So that I can base my health check alerts on its data.

As a webop
I would like to be able to easily inspect my graph data
So that I can easily review the overall performance of a cluster.

As a webop
I would like to be able to construct and share my own queries against metrics data
So that I can investigate the data available

As a webop
I would like to be able to create new alerts and checks quickly and easily
So I can quickly react to new issues discovered

As a webop
I would like to know the cache-hit ratio of my kernel fscache
So I can tune memory and backup timing for my applications.

As a webop
I would like visibility of key performance related kernel parameters
So I can see if changes in them affect system performance

As a webop
I would like visibility of key events in my system, such as reboots, deployments
So that I can see these markers on all graphs.

As a webop
I would like to be alerted when a metric has crossed a threshold
So I can examine the data and work out if it is a problem

As a webop
I would like to be provided with a link to the problem metric graph in an alert
So that I can inspect it myself.

As a webop
I would like to be alerted when a metric has started to behave abnormally
So I can see if it is a problem.

As a webop
I would like to be able to acknowledge or silence alerts that I know are not a problem
So that I don't get hassled.

As a webop
I would like to be able to configure custom per-node/service thresholds for alerts
So that I don't get hassled when the world changes.