Introducing Cloud Development with Project Shipped and Mantl: a deep dive

© 2015 Cisco and/or its affiliates. All rights reserved. Cisco Public Presentation ID

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Introducing Cloud Development with Mantl

Brian Hicks (Mantl Core Committer) Ryan Eschinger (Mantl Core Committer)

© 2015 Cisco and/or its affiliates. All rights reserved. Cisco Public Presentation ID © 2015 Cisco and/or its affiliates. All rights reserved. Cisco Public Presentation ID

•  Introduction

•  Mesos

•  Frameworks

•  Docker

•  Consul

•  Mantl

Agenda

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Introduction

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Brian Hicks Ryan Eschinger


Mesos What is it?

Program against your datacenter like it’s a single pool of resources Apache Mesos abstracts CPU, memory, storage, and other compute resources away from machines (physical or virtual), enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.

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Mesos 2-Tier Scheduler

Frameworks: •  Receive resources offered by the

master nodes •  Schedule work on offered

resources •  Are notified if workloads fail via

internal and external mechanisms

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Mesos: •  Determines resources available

on nodes in the cluster •  Offers those resources to

frameworks •  Keep track of node status (online,

offline, remaining resources)


Mesos Architecture

Slaves (Agents in 1.0): •  Tell the masters which resources

are available •  Run tasks on claimed resources

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Masters: •  Communicate with Schedulers •  Keep track of Agents •  Provide a UI for Ops / DevOps


Mesos Architecture

Executor: •  A binary or script that runs on the

slave to perform work •  Runs in an isolated environment

(can use Docker)

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Framework (Scheduler): •  Schedules work based on offers

received •  Domain specific


Framework Demos

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Marathon What is it?

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A cluster-wide init and control system for services in cgroups and Docker containers Marathon is an Apache Mesos framework for long-running applications. Given that you have Mesos running as the kernel for your datacenter, Marathon is the init or upstart daemon.


Marathon Overview

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•  Developed by Mesosphere •  Controls app resources, ports,

environment variables, and scaling

•  Runs “long-running” tasks


Cassandra What is it?

Distributed database designed for scalability and high availability Apache Cassandra is an open source distributed database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.

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Cassandra Overview

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•  Designed to handle big data workloads across multiple nodes (ring) with no single point of failure

•  Data is distributed among all nodes in the cluster •  Uses the Gossip protocol for peer-to-peer communication •  Eventually consistent (C): prioritizes Availability and Partitioning tolerance

(AP)


Cassandra Mesos Framework

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•  Automates bootstrapping and operations of Cassandra clusters

•  Bootstraps initial seed nodes and expands cluster to desired number of nodes

•  Runs periodic operational tasks •  Restart, remove, and replace nodes on failure •  Self-contained: does not require specialized software

installed on agent nodes


Spark What is it?

A fast and general engine for large-scale data processing Apache Spark is an open source, high performance big data processing framework. It provides high-level APIs in Java, Scala, Python, and R. Spark includes higher-level libraries, including support for SQL queries, streaming data, machine learning and graph processing.

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Spark Overview

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•  Originally developed at UC Berkeley in 2009 •  Up to 100x faster than Hadoop for large scale data processing •  Execution engine works both in-memory and on-disk •  Architecture

•  Data storage: supports Hadoop-compatible data sources like HDFS, HBase, Cassandra, etc.

•  API: Scala, Java, Python, and R. •  Resource Management: standalone, Mesos, Yarn


Spark on Mesos

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•  Runs as a framework •  Supports the Docker containerizer •  2-level scheduling: Spark can make decisions about the

offers it receives from Mesos •  Enables sophisticated scheduling scenarios


Spark Run Modes

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•  Coarse-grained •  Runs long-running Spark executors on every node •  Fast startup, better for interactive sessions, but can

be inefficient •  Fine Grained

•  Launches a Spark executor per task •  Slower startup but can utilize resources better


Docker What is it?

A shipping container system for applications A container virtualization platform that abstracts underlying Linux resource isolation technologies like cgroups and kernel namespaces. Allows developers to build, package, and ship applications that can run anywhere*.

*anywhere that runs a 3.10+ Linux kernel

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Docker Overview

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•  Compared to virtual machines, containers are smaller, lighter weight, more portable, and easier to deploy

•  Package an application, along with all of its dependencies, in a single artifact

•  Use the same artifact throughout development, testing, and production •  Reduces concerns about the compatibility in different environments


Consul

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Consul Discovery (HTTP)

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curl localhost:8500/v1/catalog/service/marathon [{ "Address": "10.0.113.214", "Node": "mantl-control-01", "ServiceAddress": "", "ServiceID": "marathon", "ServiceName": "marathon", "ServicePort": 18080, "ServiceTags": ["marathon"] }]


Consul Discovery (DNS)

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dig +short marathon.service.consul 10.0.113.214 10.0.220.54 10.0.131.25 dig +short marathon.service.consul SRV 1 1 18080 mantl-control-02.node.mantl.consul 1 1 18080 mantl-control-01.node.mantl.consul 1 1 18080 mantl-control-03.node.mantl-consul


Consul Key/Value Store

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curl -X PUT -d world http://localhost:8500/v1/kv/hello true


Consul Key/Value Store

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curl -X GET http://localhost:8500/v1/kv/hello [{ "CreateIndex": 223, "Flags": 0, "Key": "hello", "LockIndex": 0, "ModifyIndex": 223, "Value": "d29ybGQ=" }]


Consul consul-template

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global maxconn {{or (key "service/haproxy/maxconn") 256}} debug {{range services}} frontend {{.Name}} bind *:{{key (printf "ports/%s" .Name)}} {{range service .Name}} server {{.Node}} {{.Address}}:{{.Port}}{{end}} {{end}}


Mantl

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Introducing Cloud Development with Project Shipped and Mantl: a deep dive

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