2018 roadmap for Monitoring and Logging (knative#521)

Proposed 2018 roadmap for monitoring and logging.

roadmap/monitoring.md

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+# 2018 Roadmap for Monitoring and Logging
+
+This document captures what we hope to accomplish in 2018 in Monitoring and Logging areas for Elafros. 
+
+## Overview
+We will provide distinct experiences for [operator personas](../product/personas.md#operator-personas), 
+[developer personas](../product/personas.md#developer-personas) and [contributors](../product/personas.md#contributors).
+
+### Operator Capabilities
+* Provide default collection of cluster logs and metrics from infrastructure components such as Kubernetes.
+* Provide default dashboards and interfaces for viewing cluster logs and metrics.
+* Auto-scale, upgrade and maintain the default logging, metrics, alerting and tracing backends.
+* Operators can set custom alerts on cluster events.
+* Operators can fine tune of scale, performance and features of the default logging, metrics, alerting and tracing backends.
+* Operators can retrieve a list of all components emitting logs or metrics using a CLI.
+* Operators can "tail" logs and metrics using a CLI for a specific component.
+* Operators can install extensions that forward logs and metrics to different backends (e.g. Stack Driver).
+
+### Developer Capabilities
+* Provide default collection of logs, metrics, and request traces.
+* Provide default dashboards and interfaces for viewing logs, metrics and traces, and for setting alerts on the same.
+* Developers can set custom application and function alerts.
+* Developers can create shared dashboards for logs and metrics for applications and functions.
+* Developers can retrieve a list of all components they have access to that are emitting logs and/or metrics using a CLI.
+* Developers can "tail" logs and metrics using a CLI for any component they have access to.
+
+### Contributor Capabilities
+* Contributors can write extensions and translate logs and metrics into the format 
+for different loggings and metrics stores (e.g. StackDriver).
+
+## Basics
+### Milestones: M3 and M4
+In this phase, we will enable a shared infrastructure where everyone has access to all data. 
+No personas specific experience or access will be provided.
+
+The following items will be installed and secured in a cluster by default, 
+but we will provide the ability to replace or remove these in a later milestone.
+* Prometheus
+* Alert Manager
+* Prometheus Operator
+* Grafana
+* ElasticSearch
+* Kibana
+* Zipkin
+* Fluentd
+
+Logs from the following locations will be collected:
+* stderr & stdout for all application and function containers
+* Build logs
+
+Following metrics will be collected:
+* Envoy, Istio Mixer (per request metrics), Istio Pilot
+* Node and pod level metrics (CPU, memory, disk and network)
+* Elafros controller metrics
+
+Request logs from Istio proxy, user applications and user functions will be collected by Zipkin.
+
+## Developer Contracts
+### Milestones: M4 and M5
+In this phase, we will define and implement features for the developer persona.
+* [M4 & M5] Define and implement developer contracts for logging, metrics, alerting and tracing.
+* [M4] Write step-by-step guidelines for developers to debug issues throughout the lifecycle of their applications and functions.
+* [M4] Provide developer samples written in Golang. Support for other languages will come in a later phase.
+* [M5] Implement the developer CLI to list components and tail logs, metrics and traces.
+
+## Operator Contracts
+### Milestones: M6 and M7
+In this phase, we will define and implement features for the operator persona.
+* [M6 & M7] Define and implement operator contracts.
+* [M6] Write step-by-step guidelines for operators to debug issues in the cluster.
+* [M7] Deploy operator specific instances of the default backends to separate access of operators vs developers.
+* [M7] Implement the operator CLI to list components and tail logs and metrics.
+
+## Contributor Contracts
+### Milestones: M8
+In this phase, we will define and implement the features for the contributor persona.
+* [M8] Define and implement contracts for plugging in custom logging, metrics, alerting and tracing backends. 
+We will not provide maintenance, rollout processes, etc for third-party monitoring, logging, or tracing extensions, 
+though we may maintain a "contrib" directory for such contributions.
+* [M8] Add an extension for one managed solution (e.g. Stack Driver).
+
+## M9 and Onwards
+* Allow namespace specific instances of default backends for namespace level access control.
+* Implement auto-scaling of the default backends.
+* Implement upgrading of the default backends.
+* Implement maintenance of the default backends (data retention, daily index creations, etc).
+* Provide developer samples written in Node.js, Java, Python, PHP, .Net and Ruby.
+
+## Out of Scope for 2018
+* Improving the underlying logging, monitoring, and tracing systems to support multi-tenancy.