Domenico Pastore, Cloud Engineer - Par-Tec - Containers Landscape … · 28 openshift technical...
Transcript of Domenico Pastore, Cloud Engineer - Par-Tec - Containers Landscape … · 28 openshift technical...
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CONTAINERS LANDSCAPE REVIEWDomenico Pastore, Cloud Engineer
CONTAINERS & CLOUD-NATIVE ROADSHOWMilano, 4 Aprile 2019 | Roma, 9 Aprile 2019
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OPENSHIFT TECHNICAL OVERVIEW2
Self-Service
Multi-language
Automation
Collaboration
Multi-tenant
Standards-based
Web-scale
Open Source
Enterprise Grade
Secure
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OPENSHIFT TECHNICAL OVERVIEW3
● Introductions● Linux Containers (review)● OpenShift Architecture● Container Native Storage / Gluster Architecture● Labs
Agenda
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LINUX CONTAINERS
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OPENSHIFT TECHNICAL OVERVIEW5
WHAT ARE CONTAINERS?It Depends Who You Ask
● Application processes on a shared kernel
● Simpler, lighter, and denser than VMs
● Portable across different environments
● Package apps with all dependencies
● Deploy to any environment in seconds
● Easily accessed and shared
INFRASTRUCTURE APPLICATIONS
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OPENSHIFT TECHNICAL OVERVIEW6
VIRTUAL MACHINES AND CONTAINERS
VIRTUAL MACHINES CONTAINERS
virtual machines are isolatedapps are not
containers are isolatedso are the apps
VM
OS Dependencies
Kernel
Hypervisor
Hardware
App App App App
Hardware
Container Host (Kernel)
Container
App
OS deps
Container
App
OS deps
Container
App
OS deps
Container
App
OS deps
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OPENSHIFT TECHNICAL OVERVIEW7
Container Host
Container
Application
OS dependencies
Virtual Machine
Application
OS dependencies
Operating System
VIRTUAL MACHINES AND CONTAINERS
VM IsolationComplete OSStatic ComputeStatic MemoryHigh Resource Usage
Container IsolationShared KernelBurstable ComputeBurstable MemoryLow Resource Usage
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OPENSHIFT TECHNICAL OVERVIEW8
VIRTUAL MACHINES AND CONTAINERS
Container Host
Container
Application
OS dependencies
Dev
IT OpsInfrastructure
Virtual Machine
Application
OS dependencies
Operating System
IT Ops(and Dev, sort of)
Infrastructure
Clear ownership boundary between Dev
and IT Ops drives DevOps adoption and fosters
agility
Optimized for stability
Optimized for agility
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OPENSHIFT TECHNICAL OVERVIEW9
Virtual machines are NOT portable across hypervisor and do NOT provide portable packaging for applications
APPLICATION PORTABILITY WITH VM
VM Type X
Application
OS dependencies
Operating System
BARE METAL PRIVATE CLOUD PUBLIC CLOUDVIRTUALIZATIONLAPTOP
Application
OS dependencies
Operating System
VM Type Y
Application
OS dependencies
Operating System
VM Type Z
Application
OS dependencies
Operating System
Guest VM
Application
OS dependencies
Operating System
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OPENSHIFT TECHNICAL OVERVIEW10
APPLICATION PORTABILITY WITH CONTAINERS
LAPTOP
Container
Application
OS dependencies
Guest VM
RHEL
BARE METAL
Container
Application
OS dependencies
RHEL
VIRTUALIZATION
Container
Application
OS dependencies
Virtual Machine
RHEL
PRIVATE CLOUD
Container
Application
OS dependencies
Virtual Machine
RHEL
PUBLIC CLOUD
Container
Application
OS dependencies
Virtual Machine
RHEL
RHEL Containers + RHEL Host = Guaranteed PortabilityAcross Any Infrastructure
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OPENSHIFT TECHNICAL OVERVIEW11
Base Image
Image Layer 1
Image Layer 2
Image Layer 3
Base RHEL
OS Update Layer
Java Runtime Layer
Application Layer
Container Image Layers Example Container Image
RAPID SECURITY PATCHING USINGCONTAINER IMAGE LAYERING
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OPENSHIFT TECHNICAL OVERVIEW
A lightweight, OCI-compliant container runtime
12
Available in OpenShift Online (soon)Tech Preview in OCP 3.7, GA in OCP 3.8
Optimized for Kubernetes
Any OCI-compliant container from any
OCI registry(including docker)
Improve Security and Performance at scale
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OPENSHIFT ARCHITECTURE
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OPENSHIFT TECHNICAL OVERVIEW14
YOUR CHOICE OF INFRASTRUCTURE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW
NODES RHEL INSTANCES WHERE APPS RUN
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RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW
RHEL
NODE
c
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
C
C
C C
C
C
C CC C
APPS RUN IN CONTAINERS
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Container Image
Container
Pod
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OPENSHIFT TECHNICAL OVERVIEW17
PODS ARE THE UNIT OF ORCHESTRATION
RHEL
NODE
c
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
C
C
C C
C
C
C CC C
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OPENSHIFT TECHNICAL OVERVIEW
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
18
MASTERS ARE THE CONTROL PLANE
RED HATENTERPRISE LINUX
MASTER
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW
RHEL
NODE
RHEL
NODE
RHEL
NODE
19
API AND AUTHENTICATION
RHEL
NODE
RHEL
NODE
RHEL
NODE
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW
RHEL
NODE
RHEL
NODE
RHEL
NODE
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DESIRED AND CURRENT STATE
RHEL
NODE
RHEL
NODE
RHEL
NODE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW21
INTEGRATED CONTAINER REGISTRY
RHEL
NODE
RHEL
NODE
RHEL
RHEL
NODE
RHEL
NODE
RHEL
RHEL
NODE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
NODE
REGISTRY
RHEL
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OPENSHIFT TECHNICAL OVERVIEW22
ORCHESTRATION AND SCHEDULING
RHEL
NODE
RHEL
NODE
RHEL
RHEL
NODE
RHEL
NODE
RHEL
RHEL
NODE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULER
NODE
REGISTRY
RHEL
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OPENSHIFT TECHNICAL OVERVIEW23
PLACEMENT BY POLICY
RHEL
NODE
RHEL
NODE
RHEL
NODE
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULERREGISTRY
RHEL
NODE
RHEL
NODE
C
C
RHEL
NODE
c
C
C
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OPENSHIFT TECHNICAL OVERVIEW
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
RHEL
NODE
C
C
RHEL
NODE
c
C
C
24
AUTOSCALING PODS
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
RED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULERREGISTRY
HEALTH/SCALING
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OPENSHIFT TECHNICAL OVERVIEW25
SERVICE DISCOVERY
SERVICE LAYER
REGISTRY
RHEL
NODE
C
C
RHEL
NODE
C C
RHEL
NODE
c
C
C
RHEL
NODE
C C
RHEL
NODE
C
RHEL
NODE
CRED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULER
HEALTH/SCALING
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW26
PERSISTENT DATA IN CONTAINERS
SERVICE LAYER
PERSISTENTSTORAGE
REGISTRY
RHEL
NODE
C
C
RHEL
NODE
C C
RHEL
NODE
c
C
C
RHEL
NODE
C C
RHEL
NODE
C
RHEL
NODE
CRED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULER
HEALTH/SCALING
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW27
ROUTING AND LOAD-BALANCING
SERVICE LAYER
ROUTING LAYER
PERSISTENTSTORAGE
REGISTRY
RHEL
NODE
C
C
RHEL
NODE
C C
RHEL
NODE
c
C
C
RHEL
NODE
C C
RHEL
NODE
C
RHEL
NODE
CRED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULER
HEALTH/SCALING
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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OPENSHIFT TECHNICAL OVERVIEW28
ACCESS VIA WEB, CLI, IDE AND API
EXISTING AUTOMATION
TOOLSETS
SCM(GIT)
CI/CD
SERVICE LAYER
ROUTING LAYER
PERSISTENTSTORAGE
REGISTRY
RHEL
NODE
C
C
RHEL
NODE
C C
RHEL
NODE
c
C
C
RHEL
NODE
C C
RHEL
NODE
C
RHEL
NODE
CRED HATENTERPRISE LINUX
MASTER
API/AUTHENTICATION
DATA STORE
SCHEDULER
HEALTH/SCALING
PHYSICAL VIRTUAL PRIVATE PUBLIC HYBRID
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CONTAINER NATIVE STORAGE
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OPENSHIFT TECHNICAL OVERVIEW30
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
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OPENSHIFT TECHNICAL OVERVIEW31
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
“A request for storage”
Provider: ABCCapacity: 10 GiBFeatures: XYZ
PersistentVolumeClaim
“submits”
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OPENSHIFT TECHNICAL OVERVIEW32
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
“A request for storage”
Provider: ABCCapacity: 10 GiBFeatures: XYZ
PersistentVolumeClaim
“A provider of storage”
Provider URL: …Credentials: …Options: ...
StorageClass
“sets up”
“submits” “submitted to”
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OPENSHIFT TECHNICAL OVERVIEW33
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
“A request for storage”
Provider: ABCCapacity: 10 GiBFeatures: XYZ
PersistentVolumeClaim
“A provider of storage”
Provider URL: …Credentials: …Options: ...
StorageClass
“sets up”
“submits” “submitted to”
Storage Backend
“instructs”
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OPENSHIFT TECHNICAL OVERVIEW34
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
“A request for storage”
Provider: ABCCapacity: 10 GiBFeatures: XYZ
PersistentVolumeClaim
“A provider of storage”
Provider URL: …Credentials: …Options: ...
StorageClass
“Provisioned Storage”
Name: …Size: …AccessMode: ...
PersistentVolume
“sets up”
“submits” “submitted to” “creates”
Storage Backend
“instructs” “provisions”
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OPENSHIFT TECHNICAL OVERVIEW35
OPENSHIFT PERSISTENT STORAGE FRAMEWORK
“A request for storage”
Provider: ABCCapacity: 10 GiBFeatures: XYZ
PersistentVolumeClaim
“A provider of storage”
Provider URL: …Credentials: …Options: ...
StorageClass
“Provisioned Storage”
Name: …Size: …AccessMode: ...
PersistentVolume
APPLICATION POD(S)
“sets up”
“submits” “submitted to” “creates”
Storage Backend
“instructs” “provisions”
“mounted by”
“Bound to”
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OPENSHIFT TECHNICAL OVERVIEW36
GLUSTERFS - DISTRIBUTED FILE STORAGE
Scale Out Performance, Capacity & Availability
Scal
e U
p C
apac
ity
RED HAT GLUSTER STORAGEFOR ON-PREMISE
SERVER(CPU/MEM)
SERVER(CPU/MEM)
SERVER(CPU/MEM)
Single, Global namespace
Deploys on Red Hat-supported servers and underlying storage: DAS, JBOD
Scale-out linearly
Replicate synchronously and asynchronous
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OPENSHIFT TECHNICAL OVERVIEW37
FEDERATING LOCAL STORAGE
FILE 1 FILE 2
BRICK BRICK
CLIENT MOUNTserver1:/exp1 server2:/exp2
GLUSTERFS VOLUME
FILE 1 FILE 2
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OPENSHIFT TECHNICAL OVERVIEW38
CONTAINER-NATIVE STORAGE ON OPENSHIFT
POD
CONTAINERIZEDRED HAT GLUSTER
STORAGE
RHEL HOST OS
RED HATGLUSTER POD
GLUSTER VOLUMES
PHYSICAL DISKHOST NETWORK
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OPENSHIFT TECHNICAL OVERVIEW39
CONTAINER-NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRA
HEKETIRESTFUL GLUSTERFS
MANAGEMENT
RED HATHEKETI POD
REST API
GLUSTERFS PODS
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OPENSHIFT TECHNICAL OVERVIEW40
CONTAINER NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRA
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OPENSHIFT TECHNICAL OVERVIEW41
CONTAINER NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRAPERSISTENT
VOLUME CLAIM
1.)
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OPENSHIFT TECHNICAL OVERVIEW42
CONTAINER NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRAPERSISTENT
VOLUME CLAIM2.)
1.)
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OPENSHIFT TECHNICAL OVERVIEW43
CONTAINER NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRA
GLUSTER VOLUME
PERSISTENT VOLUME CLAIM
2.)
3.)
1.)
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OPENSHIFT TECHNICAL OVERVIEW44
CONTAINER NATIVE STORAGE ON OPENSHIFT
POD
RHGS POD
RHGS POD
RHGS POD
RHGS POD
INFRAPOD
INFRA
GLUSTER VOLUME
PERSISTENT VOLUME CLAIM
PERSISTENT VOLUME
PERSISTENT VOLUME
4.)
2.)
3.)
4.)
1.)
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OPENSHIFT TECHNICAL OVERVIEW45
CONTAINER NATIVE STORAGE ON OPENSHIFT
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OPENSHIFT TECHNICAL OVERVIEW46
CONTAINER NATIVE STORAGE ON OPENSHIFT
AVAILABILITYZONE A
AVAILABILITYZONE B
AVAILABILITYZONE C
Node Node Node Node Node Node