OpenFaaS (Functions as a Service) is a framework for building serverless functions with Docker which has first class support for metrics. Any process can be packaged as a function enabling you to consume a range of web events without repetitive boiler-plate coding. 
<ul>
<li>Ease of use through UI portal and one-click install</li>
<li>Write functions in any language for Linux or Windows and package in Docker/OCI image format</li>
<li>Portable - runs on existing hardware or public/private cloud - <a href="https://github.com/openfaas/faas-netes">Kubernetes</a> and Docker Swarm native</li>
<li><a href="http://github.com/openfaas/faas-cli">CLI</a> available with YAML format for templating and defining functions</li>
<li>Auto-scales as demand increases</li>
</ul>

OpenFaaS (Functions as a Service) is a framework for building serverless functions with Docker which has first class support for metrics. Any process can be packaged as a function enabling you to consume a range of web events without repetitive boiler-plate coding.

OpenFaaS - A serverless framework for Docker & Kubernetes

Cortex provides horizontally scalable, highly available, multi-tenant, long term storage for Prometheus. Cortex can run across multiple machines in a cluster, exceeding the throughput and storage of a single machine. This enables you to send the metrics from multiple Prometheus servers to a single Cortex cluster and run "globally aggregated" queries across all data in a single place. Cortex makes your PromQL queries blazin' fast through aggressive parallelization and caching.
 
When run in a cluster, Cortex can replicate data between machines. This allows you to survive machine failure without gaps in your graphs. Cortex can isolate data and queries from multiple different independent Prometheus sources in a single cluster, allowing untrusted parties to share the same cluster.
 
Cortex supports Amazon DynamoDB, Google Bigtable, Cassandra, S3, GCS and Microsoft Azure for long term storage of metric data. This allows you to durably store data for longer than the lifetime of any single machine, and use this data for long term capacity planning.

Cortex provides horizontally scalable, highly available, multi-tenant, long term storage for Prometheus. Cortex can run across multiple machines in a cluster, exceeding the throughput and storage of a single machine. This enables you to send the metrics from multiple Prometheus servers to a single Cortex cluster and run "globally aggregated" queries across all data in a single place. Cortex makes your PromQL queries blazin' fast through aggressive parallelization and caching.



Cortex - A multitenant, horizontally scalable Prometheus as a Service

Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream. It is especially good fit for storing Kubernetes Pod logs. Metadata such as Pod labels is automatically scraped and indexed. By storing compressed, unstructured logs and only indexing metadata, Loki is simpler to operate and cheaper to run.

Loki - Multi-tenant log aggregation system inspired by Prometheus

VictoriaMetrics is a fast, cost-effective and scalable monitoring solution and time series database. VictoriaMetrics can be used as long-term storage for Prometheus or for vmagent. It supports Prometheus querying API, so it can be used as Prometheus drop-in replacement in Grafana. It implements MetricsQL query language backwards compatible with PromQL. 
 
VictoriaMetrics provides global query view. Multiple Prometheus instances or any other data sources may ingest data into VictoriaMetrics. Later this data may be queried via a single query.

VictoriaMetrics is a fast, cost-effective and scalable monitoring solution and time series database. VictoriaMetrics can be used as long-term storage for Prometheus or for vmagent. It supports Prometheus querying API, so it can be used as Prometheus drop-in replacement in Grafana. It implements MetricsQL query language backwards compatible with PromQL. 

VictoriaMetrics - Fast, cost-effective and scalable monitoring solution and time series database

Alert dashboard for Prometheus Alertmanager. Alertmanager UI is useful for browsing alerts and managing silences, but it's lacking as a dashboard tool - unsee aims to fill this gap. Starting with 0.7.0 release it can also aggregate alerts from multiple Alertmanager instances, running either in HA mode or separate. Duplicated alerts are deduplicated so only unique alerts are displayed. Each alert is tagged with names of all Alertmanager instances it was found at and can be filtered based on those tags.

Unsee - Alert dashboard for Prometheus Alertmanager

Promscale is an open-source long-term store for Prometheus data designed for analytics. It is a horizontally scalable, highly-compressed, and operationally mature platform for Prometheus data that offers the combined power of PromQL and SQL, enabling developers to ask any question, create any dashboard, and achieve greater visibility into their systems. Promscale is built on top of TimescaleDB, the leading relational database for time-series.

Promscale - An open-source analytical platform for Prometheus metrics

Database agnostic SQL exporter for Prometheus. SQL Exporter is a configuration driven exporter that exposes metrics gathered from DBMSs, for use by the Prometheus monitoring system. Out of the box, it provides support for MySQL, PostgreSQL, Microsoft SQL Server and Clickhouse, but any DBMS for which a Go driver is available may be monitored after rebuilding the binary with the DBMS driver included.

sql_exporter - Database agnostic SQL exporter for Prometheus

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Projects

OpenFaaS - A serverless framework for Docker & Kubernetes

Cortex - A multitenant, horizontally scalable Prometheus as a Service

Loki - Multi-tenant log aggregation system inspired by Prometheus

VictoriaMetrics - Fast, cost-effective and scalable monitoring solution and time series database

Unsee - Alert dashboard for Prometheus Alertmanager

Promscale - An open-source analytical platform for Prometheus metrics

sql_exporter - Database agnostic SQL exporter for Prometheus

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Projects

OpenFaaS - A serverless framework for Docker & Kubernetes

Cortex - A multitenant, horizontally scalable Prometheus as a Service

Loki - Multi-tenant log aggregation system inspired by Prometheus

VictoriaMetrics - Fast, cost-effective and scalable monitoring solution and time series database

Unsee - Alert dashboard for Prometheus Alertmanager

Promscale - An open-source analytical platform for Prometheus metrics

sql_exporter - Database agnostic SQL exporter for Prometheus

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