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© 2016 Mesosphere, Inc. All Rights Reserved. USING DC/OS 1 Michael Hausenblas, Developer & Cloud Advocate | 2016-06-03, codecentric, Solingen

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© 2016 Mesosphere, Inc. All Rights Reserved. sys admin devops developer architect data engineer data scientist

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© 2016 Mesosphere, Inc. All Rights Reserved. SOME ADMINISTRATIVE THINGS … 3 • Clusters: go to http://301.sh/cct2016 • We have clusters prepared → team up in groups of 3-4 people • One person should drive, others help/comment/plan • Join DC/OS Slack Community • http://chat.dcos.io/ • will invite you to private channel #cc2016 • Proctors are around: Bernd, Jens, Tobi

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© 2016 Mesosphere, Inc. All Rights Reserved. TIME FOR A NEW KIND OF OPERATING SYSTEM 4

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© 2016 Mesosphere, Inc. All Rights Reserved. SINGLE MACHINE APPLICATION 5 hardware OS app

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© 2016 Mesosphere, Inc. All Rights Reserved. DISTRIBUTED APPLICATION 6 hardware OS app hardware OS hardware OS hardware OS hardware OS hardware OS hardware OS

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© 2016 Mesosphere, Inc. All Rights Reserved. DISTRIBUTED OS + DISTRIBUTED APP 7 hardware OS app hardware OS hardware OS hardware OS hardware OS hardware OS hardware OS distributed OS

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© 2016 Mesosphere, Inc. All Rights Reserved. DC/OS IS A DISTRIBUTED OS 8

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© 2016 Mesosphere, Inc. All Rights Reserved. LOCAL OS
 VS
 DISTRIBUTED OS 9

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© 2015 Mesosphere, Inc. All Rights Reserved. MEET THE DATACENTER OPERATING SYSTEM 10

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© 2016 Mesosphere, Inc. 11 https://dcos.io

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© 2016 Mesosphere, Inc. All Rights Reserved. DC/OS ARCHITECTURE 12

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© 2016 Mesosphere, Inc. All Rights Reserved. DC/OS BENEFITS 13 • One cluster for • stateless services such as Web servers & app servers (via Marathon) • stateful services like PostgreSQL, MemSQL, Kafka, Cassandra, etc. • elastic data processing via Spark, Akka, etc. • CI/CD, for example Jenkins+Marathon • Dynamic partitioning of your cluster, depending on your needs • Increased utilization (10% → 80%+)

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© 2016 Mesosphere, Inc. All Rights Reserved. 14

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© 2016 Mesosphere, Inc. All Rights Reserved. 15

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© 2016 Mesosphere, Inc. All Rights Reserved. APACHE MESOS & MARATHON 16

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© 2016 Mesosphere, Inc. All Rights Reserved. APACHE MESOS 17 • A top-level ASF project • A cluster resource negotiator • Scalable to 10,000s of nodes but also useful for a handful of nodes • Fault-tolerant, battle-tested • An SDK for distributed apps • Native Docker support mesos.apache.org

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© 2016 Mesosphere, Inc. All Rights Reserved. MESOS
 ARCHITECTURE 18 http://mesos.berkeley.edu/mesos_tech_report.pdf Marathon
 scheduler Spark
 scheduler Spark
 executor Marathon
 executor Spark
 executor Marathon
 executor Mesos Agent Mesos Agent Mesos Agent Mesos
 Master Standby
 Master Standby
 Master Framework

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© 2016 Mesosphere, Inc. All Rights Reserved. MESOS
 RESOURCES 19 • resource—anything a task consumes to carry out its work • standard resources cpu
 mem
 disk
 ports • to guarantee fair allocation across resource types —Dominant Resource Fairness (DRF) algorithm

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© 2016 Mesosphere, Inc. 20

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© 2016 Mesosphere, Inc. 22

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© 2016 Mesosphere, Inc. 27

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© 2016 Mesosphere, Inc. 28

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© 2016 Mesosphere, Inc. 29

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© 2016 Mesosphere, Inc. 30

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© 2016 Mesosphere, Inc. 31

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© 2016 Mesosphere, Inc. 32

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© 2016 Mesosphere, Inc. 33

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© 2016 Mesosphere, Inc. 34

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© 2016 Mesosphere, Inc. 35

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© 2016 Mesosphere, Inc. All Rights Reserved. MARATHON 36 Also acts as the distributed init system for DC/OS • starts instances of a long-running services • restarts the instances if they crash • supports health checks • supports multitude of upgrade strategies • HA built in

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© 2016 Mesosphere, Inc. All Rights Reserved. MARATHON
 ORGANIZATIONAL PRIMITIVES 37 • groups can contain one or more apps/groups • good for dependency management/scaling • labels → good for non-hierarchical organization https://mesosphere.com/blog/2015/06/21/web-application-analytics-using-docker-and-marathon/

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© 2016 Mesosphere, Inc. All Rights Reserved. MARATHON
 APP SPEC 38 { "id": "/webserver", "instances": 5, "cpus": 0.1, "mem": 128, "container": { "type": "DOCKER", "docker": { "image": "nginx:1.9.14", "network": "BRIDGE", "portMappings": [ { "containerPort": 80, "hostPort": 0 } ] } }, "upgradeStrategy": { "minimumHealthCapacity": 0.9 }, "acceptedResourceRoles": [ "slave_public" ] }

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© 2016 Mesosphere, Inc. All Rights Reserved. MARATHON UI/UX 39

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© 2016 Mesosphere, Inc. All Rights Reserved. MARATHON HTTP API 40 https://mesosphere.github.io/marathon/docs/generated/api.html

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© 2015 Mesosphere, Inc. Hands-on … 41

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© 2015 Mesosphere, Inc. All Rights Reserved. ELASTIC DATA PIPELINES 42

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© 2016 Mesosphere, Inc. All Rights Reserved. ELASTIC DATA PIPELINES WITH DC/OS 43 https://mesosphere.com/infinity/

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© 2015 Mesosphere, Inc. All Rights Reserved. 44 EXAMPLE 1 github.com/mesosphere/cassandra-kairosdb-tutorial

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© 2015 Mesosphere, Inc. All Rights Reserved. 45 EXAMPLE 2 mesosphere.com/blog/2015/11/18/dcos-time-series-demo/

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© 2015 Mesosphere, Inc. Hands-on … 46

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© 2015 Mesosphere, Inc. All Rights Reserved. CONTAINER OPERATIONS: CI/CD & DEPLOYMENT STRATEGIES 47

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© 2016 Mesosphere, Inc. All Rights Reserved. CONTAINER
 101 48 The why and the what: • Containers vs VMs • app-level dependency management • lightweight (startup time, footprint, average runtime) • isolation & security

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© 2016 Mesosphere, Inc. All Rights Reserved. CONTAINER
 101 49 • namespaces (isolation) • Isolate PIDs between processes • Isolate process to network resources • Isolate the hostname to fake it out (UTS) • Isolate the filesystem mount points (chroot) • Isolate inter process communication (IPC) • Isolate specific users to specific processes • cgroups (limiting & accounting)
 https://sysadmincasts.com/episodes/14-introduction-to-linux-control-groups-cgroups

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© 2016 Mesosphere, Inc. All Rights Reserved. DOCKER 50

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© 2016 Mesosphere, Inc. All Rights Reserved. DOCKER 51 Registries • Docker Hub
 https://hub.docker.com/ • Google Cloud
 https://cloud.google.com/tools/container-registry/ • AWS
 https://aws.amazon.com/ecr/ • Run your own
 https://docs.docker.com/registry/deploying/

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© 2016 Mesosphere, Inc. All Rights Reserved. CONTAINER ARTIFACTS LAYER DIAGRAM 52

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© 2016 Mesosphere, Inc. All Rights Reserved. APPOPS
 LIFE CYCLE 53

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© 2016 Mesosphere, Inc. All Rights Reserved. APPOPS
 LIFE CYCLE 54 release

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© 2016 Mesosphere, Inc. All Rights Reserved. CI/CD PIPELINES 55

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© 2016 Mesosphere, Inc. All Rights Reserved. CI/CD PIPELINES 56 https://github.com/mesosphere/training/tree/master/dcos-bootcamp-04-2016/ci-cd

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© 2015 Mesosphere, Inc. Hands-on … 57

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© 2016 Mesosphere, Inc. All Rights Reserved. DC/OS SERVICE DISCOVERY 58 DNS-based easy to integrate SRV records no health checks TTL Proxy-based no port conflicts fast failover no UDP management of VIPs (Minuteman) or service ports (Marathon-lb) Application-aware developer fully in control and full-feature implementation effort requires distributed state management (ZK, etcd or Consul) examples:
 Mesos-DNS,Consul examples:
 Minuteman, Marathon-lb examples:
 Roll-your-own, Finagle

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© 2016 Mesosphere, Inc. All Rights Reserved. LOAD BALANCING TERMINOLOGY 59 rolling deployment bring up N instances of new app & terminate N instances of old app until all old instances are gone goal: minimize capacity requirements blue-green deployment launch a new stack and switch traffic from old to new when the new instances are healthy goal: minimize impact of regressions, friction, delays, and allow easy rollbacks canary deployment bring up a new stack, start by routing a small portion of traffic to the new app, and slowly increase goal: test production traffic slowly & safely

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© 2016 Mesosphere, Inc. All Rights Reserved. DC/OS LOAD BALANCING 60 • Cluster-internal: Minuteman, a L4 distributed LB, usage via VIP in Marathon • Internal or edge: Marathon-lb, dynamically updates HAProxy, usage via package+service ports in Marathon • External, for example Azure's offerings

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© 2016 Mesosphere, Inc. All Rights Reserved. DEPLOYMENT STRATEGIES 61 • Based on health checks • Policy via • minimumHealthCapacity float value between 0—1, specifies % of app instances to maintain healthy while performing deployment • maximumOverCapacity float value between 0 — 1, specifies the maximum % of instances that can be over capacity during deployment

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© 2015 Mesosphere, Inc. Hands-on … 62

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© 2015 Mesosphere, Inc. All Rights Reserved. MICROSERVICES ON DC/OS 63

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© 2016 Mesosphere, Inc. All Rights Reserved. EXAMPLE 64 github.com/mhausenblas/marvin

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© 2015 Mesosphere, Inc. Hands-on … 65

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© 2015 Mesosphere, Inc. All Rights Reserved. LEARNING RESOURCES 66

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© 2016 Mesosphere, Inc. All Rights Reserved. 67 WHERE CAN
 I LEARN MORE? http://shop.oreilly.com/product/9781939902184.do 67 http://shop.oreilly.com/product/0636920035671.do

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© 2016 Mesosphere, Inc. All Rights Reserved. 68 WHERE CAN
 I LEARN MORE? 68 https://www.nginx.com/resources/library/docker-networking/

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© 2016 Mesosphere, Inc. All Rights Reserved. 69 WHERE CAN
 I LEARN MORE? http://shop.oreilly.com/product/0636920039952.do https://manning.com/books/mesos-in-action 69

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© 2016 Mesosphere, Inc. All Rights Reserved. Q & A 70 • @mhausenblas • mhausenblas.info • michael@dcos.io https://dcos.io