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Index
Title Page
Copyright
DevOps with Kubernetes
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Why subscribe?
Customer Feedback
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Downloading the color images of this book
Errata
Piracy
Questions
Introduction to DevOps
Software delivery challenges
Waterfall and physical delivery
Agile and electrical delivery
Software delivery on the cloud
Continuous Integration
Continuous Delivery
Configuration management
Infrastructure as code
Orchestration
Trend of microservices
Modular programming
Package management
MVC design pattern
Monolithic application
Remote Procedure Call
RESTful design
Microservices
Automation and tools
Continuous Integration tool
Continuous Delivery tool
Monitoring and logging tool
Communication tool
Public cloud
Summary
DevOps with Container
Understanding container
Resource isolation
Linux container concept
Containerized delivery
Getting started with container
Installing Docker for Ubuntu
Installing Docker for CentOS
Installing Docker for macOS
Container life cycle
Docker basics
Layer, image, container, and volume
Distributing images
Connect containers
Working with Dockerfile
Writing your first Dockerfile
Dockerfile syntax
Organizing a Dockerfile
Multi-containers orchestration
Piling up containers
Docker Compose overview
Composing containers
Summary
Getting Started with Kubernetes
Understanding Kubernetes
Kubernetes components
Master components
API server (kube-apiserver)
Controller Manager (kube-controller-manager)
etcd
Scheduler (kube-scheduler)
Node components
Kubelet
Proxy (kube-proxy)
Docker
Interaction between Kubernetes master and nodes
Getting started with Kubernetes
Preparing the environment
kubectl
Kubernetes resources
Kubernetes objects
Namespace
Name
Label and selector
Annotation
Pods
ReplicaSet (RS) and ReplicationController (RC)
Deployments
Services
Volumes
Secrets
ConfigMap
Using ConfigMap via volume
Using ConfigMap via environment variables
Multi-containers orchestration
Summary
Working with Storage and Resources
Kubernetes volume management
Container volume lifecycle
Sharing volume between containers within a pod
Stateless and stateful applications
Kubernetes Persistent Volume and dynamic provisioning
Persistent Volume claiming the abstraction layer
Dynamic Provisioning and StorageClass
A problem case of ephemeral and persistent setting
Replicating pods with a Persistent Volume using StatefulSet
Persistent Volume example
Elasticsearch cluster scenario
Elasticsearch master node
Elasticsearch master-eligible node
Elasticsearch data node
Elasticsearch coordinating node
Kubernetes resource management
Resource Quality of Service
Configuring the BestEffort pod
Configuring as the Guaranteed pod
Configuring as Burstable pod
Monitoring resource usage
Summary
Network and Security
Kubernetes networking
Docker networking
Container-to-container communications
Pod-to-pod communications
Pod communication within the same node
Pod communication across nodes
Pod-to-service communications
External-to-service communications
Ingress
Network policy
Summary
Monitoring and Logging
Inspecting a container
Kubernetes dashboard
Monitoring in Kubernetes
Application
Host
External resources
Container
Kubernetes
Getting monitoring essentials for Kubernetes
Hands-on monitoring
Meeting Prometheus
Deploying Prometheus
Working with PromQL
Discovering targets in Kubernetes
Gathering data from Kubernetes
Seeing metrics with Grafana
Logging events
Patterns of aggregating logs
Collecting logs with a logging agent per node
Running a sidecar container to forward logs
Ingesting Kubernetes events
Logging with Fluentd and Elasticsearch
Extracting metrics from logs
Summary
Continuous Delivery
Updating resources
Triggering updates
Managing rollouts
Updating DaemonSet and StatefulSet
DaemonSet
StatefulSet
Building a delivery pipeline
Choosing tools
Steps explained
env
script
after_success
deploy
Gaining deeper understanding of pods
Starting a pod
Liveness and readiness probes
Init containers
Terminating a pod
Handling SIGTERM
SIGTERM is not forwarded to the container process
SIGTERM doesn't invoke the termination handler
Container lifecycle hooks
Placing pods
Summary
Cluster Administration
Kubernetes namespaces
Default namespaces
Create a new namespace
Context
Create a context
Switch the current context
ResourceQuota
Create a ResourceQuota for a namespace
Request pods with default compute resource limits
Delete a namespace
Kubeconfig
Service account
Authentication and authorization
Authentication
Service account authentication
User account authentication
Authorization
Attribute-based access control (ABAC)
Role-based access control (RBAC)
Roles and ClusterRoles
RoleBinding and ClusterRoleBinding
Admission control
Namespace life cycle
LimitRanger
Service account
PersistentVolumeLabel
DefaultStorageClass
ResourceQuota
DefaultTolerationSeconds
Taints and tolerations
PodNodeSelector
AlwaysAdmit
AlwaysPullImages
AlwaysDeny
DenyEscalatingExec
Other admission controller plugins
Summary
Kubernetes on AWS
Introduction to AWS
Public cloud
API and infrastructure as code
AWS components
VPC and subnet
Internet gateway and NAT-GW
Security group
EC2 and EBS
Route 53
ELB
S3
Setup Kubernetes on AWS
Install kops
Run kops
Kubernetes cloud provider
L4 LoadBalancer
L7 LoadBalancer (ingress)
StorageClass
Maintenance Kubernetes cluster by kops
Summary
Kubernetes on GCP
Introduction to GCP
GCP components
VPC
Subnets
Firewall rules
VM instance
Load balancing
Health check
Backend service
Creating a LoadBalancer
Persistent Disk
Google Container Engine (GKE)
Setting up your first Kubernetes cluster on GKE
Node pool
Multi zone cluster
Cluster upgrade
Kubernetes cloud provider
StorageClass
L4 LoadBalancer
L7 LoadBalancer (ingress)
Summary
What's Next
Exploring the possibilities of Kubernetes
Mastering Kubernetes
Job and CronJob
Affinity and anti-affinity between pods and nodes
Auto-scaling of pods
Prevention and mitigation of pod disruptions
Kubernetes federation
Cluster add-ons
Kubernetes and communities
Kubernetes incubator
Helm and charts
Gravitating towards a future infrastructure
Docker swarm mode
Amazon EC2 container service
Apache Mesos
Summary
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