Provide enhanced production metrics dashboard
<!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> *This page may contain information related to upcoming products, features and functionality. It is important to note that the information presented is for informational purposes only, so please do not rely on the information for purchasing or planning purposes. Just like with all projects, the items mentioned on the page are subject to change or delay, and the development, release, and timing of any products, features, or functionality remain at the sole discretion of GitLab Inc.* <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> For operations and managers, ensuring key targets are met by your service is important. For example, a company may have SLA's written into agreements for a specific level of uptime. Or, a company may have an internal goal that 99% of all requests are processed within 200ms. With GitLab and our monitoring capabilities, we can help companies track these important metrics. Initially, the browser performance tests (https://gitlab.com/gitlab-org/gitlab-ee/issues/3046) could effectively act as both a pingdom-like service as well as a way to exercise multiple different parts of an application. This would provide both a measure of the actual latency as perceived by a browser, as well as whether any requests were being returned. Further, since these are operated on Runners, it would be possible for a company to put these in various parts of the world for even deeper levels of testing. A few key metrics that could be tracked: * Uptime & current SLA * p95/p99 response times * Error rates * Failed authentications * Current & Max Sessions * Deploys, rollbacks (?) * Cluster health / resources * Component Status (Red/Yellow/Green) These could also trend into business metrics as well: * Conversion rates * Daily Active Users * New user registrations * Infrastructure cost/scaling * etc... This could serve as an excellent executive dashboard, providing an overview of the health of their service in a few different dimensions. Initially, this could serve as an internal dashboard within GitLab, but some of these build blocks could also power a public facing SaaS Service Status page. The general work flow could be: - [ ] Track the uptime over time of `/` - [ ] Support additional URL's (https://gitlab.com/gitlab-org/gitlab-ee/issues/3540) - [ ] Incorporate additional performance metrics like response times, error rates - [ ] Add support for business metrics - [ ] Add CI/CD data like deploys, rollbacks
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