More Containers, More Problems
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- Douglas Perkins
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1 More Containers, More Problems Ed coreos.com
2 Agenda Define problems Define vision of the solution How CoreOS is building solutions How you can get started
3 It all started with... a server
4 Then we got... many servers
5 Then we got... VMs on our servers
6 Then we got... APIs around hosted VMs (cloud)
7 Which led to... even more servers
8 Too Many Servers! The cloud made booting servers really easy. Also Moore s law is still a thing.
9 More Servers, More Problems Patching..is hard Dependency management...is hard Managing access...is hard Managing workloads...is hard App Lifecycle management....is hard Identifying security issues...is hard
10 More Servers == More Sysadmins 1000 Servers Sysadmins 500 0
11 More Servers, More Problems 1000 Servers Sysadmins 500 0
12 Google needed more servers before the rest of us did. They solved many of these problems internally, and published some great papers.
13 We started building it CoreOS, Google, and the community... are building the open-source version.
14 #GIFEE
15 What is #GIFEE? Google s Infrastructure For Everyone Else
16 Google s Infrastructure "Fundamentally, it's what happens when you ask a software engineer to design an operations function." --Ben Treynor Sloss Vice President, Google Engineering founder of Google SRE
17
18 What is #GIFEE? Servers are not your pets Servers are the new CPU Cores Clusters are the new servers
19 Evolution of Servers
20 Clusters Server Cluster
21 Clusters Process App
22 Operating System Custom Linux Distributed Consensus Chubby Cluster Manager Borg Monitoring BorgMon RPC framework Stubby Auth private
23 Open Source Operating System Custom Linux CoreOS Linux Distributed Consensus Chubby etcd Cluster Manager Borg Kubernetes Monitoring BorgMon Prometheus RPC framework Stubby grpc Auth private Dex
24 cluster operating system
25 OS for Clusters Orchestration State Scheduler: Gets work to the servers
26 What is #GIFEE? Software manages servers Software manages workloads Declare what you want, it will become so
27 API + scheduler worker kubelet worker kubelet worker kubelet worker kubelet worker kubelet worker kubelet worker kubelet
28 API + scheduler worker kubelet
29 API + Scheduler + worker works on 1 node too
30 Primary component of the Cluster OS Fits our vision Started by Google with over 10 yrs experience running Borg
31 What is #GIFEE? Centralized administration & orchestration No more SSH Yes, that even means your favorite config mgmt tool
32 What is #GIFEE? Don t say HOW $ scp myapp host:/opt $ ssh host systemd-run /opt/myapp
33 What is #GIFEE? say WHAT $ kubectl run myapp --image=quay.io/sym3tri/hello --replicas=1 $ kubectl get pods POD IP myapp-97wt
34 What is #GIFEE? say WHAT again $ kubectl scale rc myapp --replicas=4 $ kubectl get POD myapp-97wt8 myapp-f839d myapp-98b35 myapp-e40ee pods IP
35 What is #GIFEE? say WHAT one more time $ kubectl run myapp --image=quay.io/sym3tri/hello --replicas=1 $ kubectl get pods POD IP myapp-97wt
36
37 RC web-prod Pod select(env=prod,app=web) count=1 env=prod app=web
38 RC web-prod select(env=prod,app=web) count=4 Pod Pod Pod Pod env=prod env=prod app=web env=prod app=web env=prod app=web app=web
39 automated!= automatic
40 What is #GIFEE? Dependencies are isolated per app Apps automatically migrate throughout the cluster
41 What is #GIFEE? All apps are 12-factor Configuration/Secret management prod config staging config
42 What is #GIFEE? Consistent Deployment API Deploy canary builds and experiments Rolling Updates
43 app v1 app v1 Load Balanced Service app v1 app v1
44 app v1 app v1 Load Balanced Service app v1 app v1 app v2
45 app v1 app v1 Load Balanced Service app v1 app v1 app v2
46 app v1 app v1 Load Balanced Service app v1 app v1 app v2
47 app v1 app v1 Load Balanced Service app v1 app v2 app v2
48 app v1 app v1 Load Balanced Service app v2 app v2 app v2
49 app v2 Load Balanced Service app v2 app v2 app v2
50 What is #GIFEE? Mixed workloads (staging + prod) A Team Logically partitioned resources B Team C Team
51 What is #GIFEE? Trusted & Secure from the bottom up* Cluster OS Container Runtime Only trusted code is executed OS Firmware & TPM
52 What is #GIFEE? Every {human,machine,process} is authenticated & authorized API + scheduler All communication is encrypted worker kubelet
53 What is #GIFEE? Failure is expected and handled for - Services / Apps Machines Storage Clusters Regions
54 What is #GIFEE? Logging Monitoring / Alerting
55 #GIFEE vs Google Infra? Compatibility with existing tools Work with other projects (Docker, Calico, Prometheus) Incorporates lessons learned
56 Why? Build for scale Manage your apps, not servers High Availability New paradigm of infra/development
57 #GIFEE and Security We believe: As #GIFEE becomes ubiquitous, the Internet becomes more secure overall
58 CoreOS Mission Secure the Internet
59 Journey to #GIFEE
60 Getting Started Leverage prior work + standards - Raft - Omaha Protocol - OIDC
61 Securing The Internet Start from the bottom The Operating System
62 Securing The Internet Minimal Server OS + Automatic Updates Requires: - Distributed consensus - Containers - Cluster computing
63 Containerize In this new world we containerize all the things
64 Containerize but
65 More Containers, More Problems Every solution breeds new problems -Arthur Bloch 1つの問題解決 別の問題発生
66 More Containers, More Problems Problem #1 - Secure & controlled container distribution
67 More Containers, More Problems Problem #1 - Secure & controlled container distribution Solution
68 More Containers, More Problems Problem #2 - Docker security model - Docker coupling of components
69 More Containers, More Problems Problem #2 - Docker security model - Docker coupling of components Solution
70 More Containers, More Problems systemd systemd docker run redis docker engine daemon app app
71 Side Note: Spec vs Implementation Implementation:
72 Side Note: Spec vs Implementation Specification:
73 More Containers, More Problems Problem #3 - User Authentication
74 More Containers, More Problems Problem #3 - User Authentication Solution - Dex
75 More Containers, More Problems Problem #4 - Really big containers
76 More Containers, More Problems Problem #4 - Really big containers Solution - Go - Buildroot - acbuild for ACIs
77 Your container is 500MB!? NOOOOOOOOO!!! github.com/brianredbeard/minimal_containers
78 More Containers, More Problems Problems # Co-locating Containers Intelligent Scheduling Port Management Segmenting workloads Configuration Management Secrets Management Inconsistent Deployments
79 More Containers, More Problems Problems # Co-locating Containers Intelligent Scheduling Port Management Segmenting workloads Configuration Management Secrets Management Inconsistent Deployments Solution
80 More Containers, More Problems Problem #12 Networking - Too many types of SDNs - IP per POD
81 More Containers, More Problems Problem #12 Networking - Too many types of SDNs - IP per POD Solution - CNI
82 More Containers, More Problems Problem #13 - Metrics - Monitoring - Alerting
83 More Containers, More Problems Problem #13 - Metrics - Monitoring - Alerting Solution - Prometheus
84 More Containers, More Problems Problem #14 - Vulnerabilities inside containers
85 More Containers, More Problems Problem #14 - Vulnerabilities inside containers Solution
86
87 More Containers, More Problems Problem #15 - Visualize & configure clusters
88 More Containers, More Problems Problem #15 - Visualize & configure clusters Solution - Tectonic Console
89
90 More Containers, More Problems Problem #16 - Running on Bare Metal
91 More Containers, More Problems Problem #16 - Running on Bare Metal Solution - Ignition - coreos-baremetal - Tectonic baremetal installer
92 More Containers, More Problems Problem #17 - Inability to verify node trust
93 More Containers, More Problems Problem #17 - Inability to verify node trust Solution - Distributed Trusted Computing (DTC)
94 More Containers, More Problems Problem #18 - Persistent storage
95 More Containers, More Problems Problem #18 - Persistent storage Solution - Torus
96 Kubernetes is the kernel, Tectonic is the distro.
97 off-the-shelf #GIFEE
98 Kubernetes Contributions OIDC Authentication 2x Scheduler Performance RBAC Authorization etcd 3 support TLS Bootstrapping coreos-kubernetes rktnetes Bootstrap/Upgrade Simplification
99 Future More Management Tools Prometheus Enhancements Expand platform support Federated Clusters
100 Summary Open-Source is key Containers Security is key Orchestration Updates are key Automatic systems
101 More Containers, More Problems Ed coreos.com
102 CoreOS is Running the World s Containers OPEN SOURCE ENTERPRISE 90+ Projects on GitHub, 1,000+ Contributors Secure solutions, support plans, training + more CoreOS.com - github/coreos sales@coreos.com - tectonic.com - quay.io We re hiring in all departments! careers@coreos.com Positions: coreos.com/ careers
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