Scheduling at Scale - Speaker Deck

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Scheduling at Scale Photo by Sašo Tušar on Unsplash @anubhavm 

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@anubhavm Anubhav Mishra Developer Advocate, HashiCorp

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@anubhavm Anubhav Mishra Developer Advocate, HashiCorp has stickers

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PROVISION, SECURE AND RUN ANY INFRASTRUCTURE Nomad Consul Vault Vagrant Packer Terraform Consul Enterprise Terraform Enterprise Vault Enterprise PRODUCT SUITE OSS TOOL SUITE RUN Applications SECURE Application Infrastructure PROVISION Infrastructure FOR INDIVIDUALS FOR TEAMS Nomad Enterprise

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Scheduling Photo by Emma Matthews on Unsplash

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Copyright © 2017 HashiCorp @anubhavm  !9 [1] Assigning an appropriate number of workers to the jobs during each day of work. Scheduling [1] Read more: http://www.businessdictionary.com/definition/scheduling.html

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@anubhavm  !39 Cluster Scheduler Deployments Job Speciﬁcation

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@anubhavm  !X job "redis" { datacenters = ["us-east-1"] task "redis" { driver = "docker" config { image = "redis:latest" } resources { cpu = 500 # Mhz memory = 256 # MB network { mbits = 10 port "redis" {} } } } }

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@anubhavm  !X job "webserver" { datacenters = ["us-east-1"] task "webserver" { driver = "exec" config { command = "yet-another-golang-webserver-linux_amd64" } artifact { source = "https://github.com/anubhavmishra/yet-another-golang-webserver/releases/ download/v1.0.0/yet-another-golang-webserver-linux_amd64" } resources { cpu = 500 # Mhz memory = 128 # MB network { port "http" { static = 8080 } } } } }

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Designing

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@anubhavm  !46 Multi-Datacenter Multi-Region Flexible Workloads Job Priorities Bin Packing Large Scale Operationally Simple

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@anubhavm  !49 Cluster Management Gossip Based (P2P) Membership Failure Detection Event System Serf

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@anubhavm  !50 Serf Gossip Protocol Large Scale Production Hardened Operationally Simple

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@anubhavm  !51 Service Discovery Conﬁguration Coordination (Locking) Central Servers + Distributed Clients

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@anubhavm  !52 Multi-Datacenter Raft Consensus Large Scale Production Hardened

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@anubhavm  !57 Optimistic vs Pessimistic Internal vs External State Single vs Multi Level Fixed vs Pluggable Service vs Batch Oriented

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@anubhavm  !58 Inspired by Google Omega Optimistic Concurrency State Coordination Service & Batch workloads Pluggable Architecture

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Copyright © 2017 HashiCorp @anubhavm  Consul Cluster !59 CLIENT CLIENT CLIENT CLIENT CLIENT CLIENT SERVER SERVER SERVER REPLICATION REPLICATION RPC RPC LAN GOSSIP SERVER SERVER SERVER REPLICATION REPLICATION WAN GOSSIP

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Copyright © 2017 HashiCorp @anubhavm  Single Region Architecture !60 SERVER SERVER SERVER CLIENT CLIENT CLIENT DC1 DC2 DC3 FOLLOWER LEADER FOLLOWER REPLICATION FORWARDING REPLICATION FORWARDING RPC RPC RPC

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Copyright © 2017 HashiCorp @anubhavm  Single Region Architecture !61 SERVER SERVER SERVER FOLLOWER LEADER FOLLOWER REPLICATION FORWARDING REPLICATION REGION B  GOSSIP REPLICATION REPLICATION FORWARDING REGION FORWARDING  REGION A SERVER FOLLOWER SERVER SERVER LEADER FOLLOWER

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Drivers

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@anubhavm  !70 Containerized Virtualized Standalone Docker Qemu / KVM Java Jar Static Binaries rkt LXC

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@anubhavm  !71 Containerized Virtualized Standalone Docker Qemu / KVM Java Jar Static Binaries rkt LXC Windows Server Containers Hyper-V Xen C#

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@anubhavm  !73 Single Binary No Dependencies Highly Available

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Nomad Million Container Challenge 1,000 Jobs 1,000 Tasks per Job 5,000 Hosts on GCE 1,000,000 Containers

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| June 25-27, 2018

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October 22-24, 2018 | San Francisco

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Thank You! I have stickers! Ask me anything. @anubhavm www.hashicorp.com Anubhav Mishra