Struggling to understand all the hype around Docker? Don't understand the difference between a VM and a container? Why are immutable operating systems cool? Why is everyone going crazy over Kubernetes/Swarm/Apache Mesos? This talk will attempt to inform by pulling back the curtain on the container hype. We will dissect what a container is, why clustering containers and orchestration matters, immutable operating systems and finally where this is all going and how it will effect your future interaction with the cloud.

2. Derrick J. Wippler
Blog: http://thrawn01.org
Twitter: @thrawn01

3. CBS
Cloud Block Storage

4. Android Super NES Emulator
http://www.superretro16.com/

5. Android Super NES Emulator
http://www.superretro16.com/
Tech Talk Tuesday, April 5th

6. Containers

8. What Containers Are NOT

9. DOCKER != CONTAINERS

11. Container Technology is
provided by the Linux
Kernel

12. NOT LXC

13. Linux Kernel Containers

14. Everything you need to create and
run containers already exists in the
linux kernel

15. Everything you need to create and
run containers already exists in the
linux kernel

16. However…….

22. CHROOT

24. CHROOT PROVIDES
Isolate Process & File systems

25. CHROOT

26. CHROOT
Kernel Namespaces
CGroups

27. Namespaces

28. PID Namespaces
NET Namespaces

29. PID Namespaces Provide
Process Isolation

31. PID NameSpace 1

32. PID NameSpace 1
PID NameSpace 2
PID NameSpace 3
PID NameSpace 4

33. PID NameSpace 1
PID NameSpace 2
PID NameSpace 3
PID NameSpace 4
CHROOT ?

34. NET Namespaces

35. NET Namespaces Provide
Network Isolation

36. Root NET Namespace
NET Namespace 1
NET Namespace 2

37. Root NET Namespace
NET Namespace 1
NET Namespace 2

38. Network your chroots together inside the
kernel

39. Network your chroots together inside the
kernel
Sounds like - VM Hypervisor

40. Container is NOT a VM

41. Container is NOT a VM
VM’s run entire OS

42. Container is NOT a VM
VM’s run entire OS
Containers run a single process

43. <demo>

45. Remember, when you start a container, you are just
starting a process with namespaces

52. Existing container
workloads on VMs
2X DataCenters

55. Configuration
Management

56. Infrastructure is in a known state.
Prevent Infrastructure drift.
Self Healing

57. Reliability
Overall Goal of a CMS

58. Container Images treated as
immutable
No more Infrastructure Drift

59. Prevent Infrastructure drift
Infrastructure is in a known state
Self Healing

60. Clustering

61. What is Kubernetes
Kubernetes is an open source orchestration system for Docker
containers. It handles scheduling onto nodes in a compute cluster and
actively manages workloads to ensure that their state matches the
user's declared intentions.

62. Kubernetes Monitoring
Builtin support for application level health checks
(DB Checks, Socket & Http checks, etc…)
Automatically restart crashed processes (aka containers)
Natively React to Monitor Events

63. Prevent Infrastructure drift
Infrastructure is in a known state
Self Healing

65. MANAGED BY KUBERNETES
Self healing
No Infrastructure Drift
Infrastructure is in a known state
Reliability

66. Why do we need Configuration
Management?

67. What about Operating System Configuration?

68. Immutable Operating Systems
Immutable Infrastructure
AKA

69. Brandon Phillips CTO Alex Polvi CEO

70. All you need is a OS that can run
Containers

71. No Package Manager
Immutable Config files

72. Why configure the OS?
Our containers can contain all OS config
files and daemons necessary for our
application to run

73. How to configure all the disparate containers?

74. Consistent Distributed Key Store

76. Why do we need Configuration
Management?

77. Brian Redbeard
Principal Architect CoreOS

78. “If we do our job correctly, future releases
of CoreOS will NOT have SSH server
installed”

79. “If we do our job correctly, future releases
of CoreOS will NOT have SSH server
installed”

80. How you would design your
infrastructure/software if you were unable
to SSH into the host OS?

82. Infrastructure as a service is dying

84. Typical Operating System
Kernel
Configuration
Storage
Workloads

85. Typical Operating System
Kernel
Configuration
Storage
Linux Kernel
/etc
FileSystems EXT4
Workloads Processes

86. Typical Operating System
Kernel
Configuration
Storage
Linux Kernel
/etc
FileSystems EXT4
Kubernetes
etcd
ISCSI Block or
FSAS
Workloads Processes Containers

87. Cloud Operating System

88. Infinite CPU Power
Infinite RAM
Infinite DISK
Distributed Scale
Self Healing
Always Available

89. All I WANT
create my application in a container
make it scale
I don’t want it to go down

91. Blog: http://thrawn01.org
Twitter: @thrawn01