DevOps · Puppet, Docker, and Kubernetes by Uphill, Thomas -- Read -- Imperial Library of Trantor

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DevOps: Puppet, Docker, and Kubernetes Credits Preface What this learning path covers What you need for this learning path Who this learning path is for Reader feedback Customer support Downloading the example code Errata Piracy Questions 1. Module 1 1. Puppet Language and Style Introduction Adding a resource to a node How to do it... How it works... Using Facter to describe a node How to do it... How it works... There's more... Variables Scope Installing a package before starting a service How to do it... How it works... Capitalization Learning metaparameters and ordering Trifecta Idempotency Installing, configuring, and starting a service How to do it... How it works… Using community Puppet style How to do it… Indentation Quoting False Variables Parameters Symlinks Creating a manifest How to do it... There's more… Checking your manifests with Puppet-lint Getting ready How to do it... There's more... See also Using modules How to do it… How it works… There's more… Templates Facts, functions, types, and providers Third-party modules Module organization See also Using standard naming conventions How to do it… There's more… Using inline templates How to do it… How it works… There's more... See also Iterating over multiple items How to do it… How it works… There's more… Using hashes Creating arrays with the split function Writing powerful conditional statements How to do it… How it works… There's more… Elseif branches Comparisons Combining expressions See also Using regular expressions in if statements How to do it… How it works… There's more… Capturing patterns Regular expression syntax See also Using selectors and case statements How to do it… How it works… Selector Case statement There's more… Regular expressions Defaults Using the in operator How to do it… There's more… Using regular expression substitutions How to do it… How it works… There's more… See also Using the future parser Getting ready How to do it... Appending to and concatenating arrays Lambda functions Reduce Filter Map Slice Each Other features 2. Puppet Infrastructure Introduction Installing Puppet Getting ready How to do it... Managing your manifests with Git Getting ready How to do it... How it works... There's more... Creating a decentralized Puppet architecture Getting ready How to do it... How it works... Writing a papply script How to do it... How it works... Running Puppet from cron Getting ready How to do it... How it works... There's more... Bootstrapping Puppet with bash Getting ready How to do it... How it works... There's more... Creating a centralized Puppet infrastructure Getting ready How to do it... How it works... There's more... Creating certificates with multiple DNS names Getting ready How to do it... How it works... Running Puppet from passenger Getting ready How to do it... How it works... There's more... Setting up the environment Getting ready How to do it... There's more... Configuring PuppetDB Getting ready How to do it... How it works... There's more... Configuring Hiera Getting ready How to do it... How it works... There's more... Setting node-specific data with Hiera Getting ready How to do it... How it works... Storing secret data with hiera-gpg Getting ready How to do it... How it works... There's more... See also Using MessagePack serialization Getting ready How to do it... How it works... Automatic syntax checking with Git hooks How to do it... How it works... Pushing code around with Git Getting ready How to do it... How it works... Managing Environments with Git Getting ready How to do it... How it works... There's more... 3. Writing Better Manifests Introduction Using arrays of resources How to do it… How it works… See also Using resource defaults How to do it... How it works... There's more... Using defined types How to do it… How it works… There's more… See also Using tags How to do it... There's more… Using run stages How to do it… How it works… There's more… See also Using roles and profiles How to do it… How it works… There's more… Passing parameters to classes How to do it… How it works… There's more… Specifying default values Passing parameters from Hiera Getting ready How to do it... How it works... There's more... Writing reusable, cross-platform manifests How to do it… How it works... There's more… See also Getting information about the environment How to do it… How it works… There's more… See also Importing dynamic information Getting ready How to do it… How it works… There's more… See also Passing arguments to shell commands How to do it… How it works… 4. Working with Files and Packages Introduction Making quick edits to config files Getting ready How to do it... How it works… There's more… Editing INI style files with puppetlabs-inifile Getting ready How to do it... How it works... There's more... Using Augeas to reliably edit config files How to do it… How it works… There's more… Building config files using snippets Getting ready How to do it... How it works... Using ERB templates How to do it… How it works… There's more… See also Using array iteration in templates How to do it… How it works… There's more… See also Using EPP templates How to do it... How it works... There's more... Using GnuPG to encrypt secrets Getting ready How to do it... How it works... There's more... See also Installing packages from a third-party repository How to do it… How it works… There's more... Comparing package versions How to do it… How it works… 5. Users and Virtual Resources Introduction Using virtual resources How to do it... How it works... There's more... Managing users with virtual resources How to do it... How it works... There's more... See also Managing users' SSH access How to do it... How it works... There's more... Managing users' customization files How to do it... How it works... There's more... See also Using exported resources Getting ready How to do it... How it works... There's more... 6. Managing Resources and Files Introduction Distributing cron jobs efficiently How to do it... How it works... There's more... See also Scheduling when resources are applied How to do it... How it works... There's more... Using host resources How to do it... How it works... There's more... Using exported host resources Getting ready How to do it... How it works... There's more... Using multiple file sources How to do it... How it works... There's more... See also Distributing and merging directory trees How to do it... How it works... There's more... Cleaning up old files How to do it... How it works... There's more... Auditing resources How to do it... How it works... There's more... See also Temporarily disabling resources How to do it... How it works... 7. Managing Applications Introduction Using public modules How to do it... How it works... There's more... Managing Apache servers How to do it... How it works... Creating Apache virtual hosts How to do it... How it works... There's more... Creating nginx virtual hosts How to do it... How it works... There's more... Managing MySQL How to do it... How it works... There's more... Creating databases and users How to do it... How it works... There's more... 8. Internode Coordination Introduction Managing firewalls with iptables Getting ready How to do it... How it works... There's more... Building high-availability services using Heartbeat Getting ready How to do it… How it works… There's more... Managing NFS servers and file shares How to do it... How it works… Using HAProxy to load-balance multiple web servers How to do it… How it works… There's more... Managing Docker with Puppet Getting ready How to do it... How it works... There's more... 9. External Tools and the Puppet Ecosystem Introduction Creating custom facts How to do it... How it works... There's more... See also Adding external facts Getting ready How to do it... How it works... There's more... Debugging external facts Using external facts in Puppet See also Setting facts as environment variables How to do it... Generating manifests with the Puppet resource command How to do it... There's more... Generating manifests with other tools Getting ready How to do it... There's more... Using an external node classifier Getting ready How to do it... How it works... There's more... See also Creating your own resource types How to do it... How it works... There's more... Documentation Validation Creating your own providers How to do it... How it works... There's more... Creating custom functions How to do it... How it works... There's more... Testing your puppet manifests with rspec-puppet Getting ready How to do it... How it works... There's more... See also Using librarian-puppet Getting ready How to do it... How it works... There's more... Using r10k Getting ready How to do it... How it works... There's more... 10. Monitoring, Reporting, and Troubleshooting Introduction Noop – the don't change anything option How to do it... How it works... There's more... See also Logging command output How to do it... How it works... There's more... Logging debug messages How to do it... How it works... There's more... Printing out variable values Resource ordering Generating reports How to do it... How it works... There's more... Other report types See also Producing automatic HTML documentation How to do it... How it works... There's more... Drawing dependency graphs Getting ready How to do it... How it works... There's more... See also Understanding Puppet errors How to do it... See also Inspecting configuration settings How to do it... How it works... See also 2. Module 2 1. Introduction and Installation Introduction Namespaces The pid namespace The net namespace The ipc namespace The mnt namespace The uts namespace The user namespace Cgroups The Union filesystem Verifying the requirements for Docker installation Getting ready How to do it… How it works… See also Installing Docker Getting ready How to do it… How it works... There's more… See also Pulling an image and running a container Getting ready How to do it… How it works… There's more… See also Adding a nonroot user to administer Docker Getting ready How to do it… How it works… Setting up the Docker host with Docker Machine Getting ready How to do it… How it works… There's more… See also Finding help with the Docker command line Getting ready How to do it… How it works… See also 2. Working with Docker Containers Introduction Listing/searching for an image Getting ready How to do it… How it works… There's more… See also Pulling an image Getting ready How to do it… How it works… There's more… See also Listing images Getting ready How to do it… How it works… There's more… See also Starting a container Getting ready How to do it… How it works… There's more… See also Listing containers Getting ready How to do it… How it works… There's more… See also Looking at the logs of containers Getting ready How to do it… How it works… There's more… See also Stopping a container Getting ready How to do it… How it works… There's more… See also Deleting a container Getting ready How to do it… There's more… How it works… See also Setting the restart policy on a container Getting ready How to do it… There's more… See also Getting privileged access inside a container Getting ready How to do it… How it works… There's more… See also Exposing a port while starting a container Getting ready How to do it… There's more… See also Accessing the host device inside the container Getting ready How to do it… How it works… See also Injecting a new process to a running container Getting ready How to do it… How it works… See also Returning low-level information about a container Getting ready How to do it… How it works… There's more… See also Labeling and filtering containers Getting ready How to do it… How it works… There's more… See also 3. Working with Docker Images Introduction Creating an account with Docker Hub Getting ready How to do it… How it works… See also Creating an image from the container Getting ready How to do it… How it works… There's more… See also Publishing an image to the registry Getting ready How to do it… How it works… There's more… See also Looking at the history of an image Getting ready How to do it… How it works… There's more… See also Deleting an image Getting ready How to do it… There's more… See also Exporting an image Getting ready How to do it… There's more… See also Importing an image Getting ready How to do it… See also Building images using Dockerfiles Getting ready How to do it… How it works… There's more… See also Building an Apache image – a Dockerfile example Getting ready How to do it… How it works… There's more… See also Accessing Firefox from a container – a Dockerfile example Getting ready How to do it… How it works… There's more... See also Building a WordPress image – a Dockerfile example Getting ready How to do it… How it works… There's more… See also Setting up a private index/registry Getting ready How to do it… How it works… There's more… See also Automated builds – with GitHub and Bitbucket Getting ready How to do it… How it works… There's more… See also Creating the base image – using supermin Getting ready How to do it… How it works… There's more… See also Creating the base image – using Debootstrap Getting ready How to do it… See also Visualizing dependencies between layers Getting ready How to do it… How it works… There's more… See also 4. Network and Data Management for Containers Introduction Accessing containers from outside Getting ready How to do it… How it works… There's more… See also Managing data in containers Getting ready How to do it... How it works… There's more… See also Linking two or more containers Getting ready How to do it… How it works… There's more… See also Developing a LAMP application by linking containers Getting ready How to do it… How it works… Networking of multihost containers with Flannel Getting ready How to do it… How it works… See also Assigning IPv6 addresses to containers Getting ready How to do it… How it works… There's more… See also 5. Docker Use Cases Introduction Testing with Docker Getting ready How to do it… How it works… There's more… Doing CI/CD with Shippable and Red Hat OpenShift Getting ready How to do it… How it works… See also Doing CI/CD with Drone Getting ready How to do it… How it works… There's more… See also Setting up PaaS with OpenShift Origin Getting ready How to do it… How it works… There's more… See also Building and deploying an app on OpenShift v3 from the source code Getting ready How to do it… How it works… There's more… See also Configuring Docker as a hypervisor driver for OpenStack Getting ready How to do it… How it works... There's more… See also 6. Docker APIs and Language Bindings Introduction Configuring the Docker daemon remote API Getting ready How to do it… How it works… There's more… See also Performing image operations using remote APIs Getting ready How to do it… How it works… There's more… See also Performing container operations using remote APIs Getting ready How to do it… How it works… See also Exploring Docker remote API client libraries Getting ready How to do it… How it works… There's more… Securing the Docker daemon remote API Getting ready How to do it... How it works… There's more… 7. Docker Performance Introduction Benchmarking CPU performance Getting ready How to do it… How it works… There's more… See also Benchmarking disk performance Getting ready How to do it… How it works… There's more… See also Benchmarking network performance Getting ready How to do it… How it works… There's more… See also Getting container resource usage using the stats feature Getting ready How to do it… How it works… See also Setting up performance monitoring Getting ready How to do it… How it works… There's more… See also 8. Docker Orchestration and Hosting Platforms Introduction Running applications with Docker Compose Getting ready How to do it… How it works… There's more… See also Setting up cluster with Docker Swarm Getting ready How to do it… How it works… There's more… See also Setting up CoreOS for Docker orchestration Getting ready How to do it… How it works… There's more… See also Setting up a Project Atomic host Getting ready How to do it… How it works… There's more… See also Doing atomic update/rollback with Project Atomic Getting ready How to do it… How it works… See also Adding more storage for Docker in Project Atomic Getting ready How to do it… How it works… There's more… See also Setting up Cockpit for Project Atomic Getting ready How to do it… How it works… There's more… See also Setting up a Kubernetes cluster Getting ready How to do it… How it works… There's more… See also Scaling up and down in a Kubernetes cluster Getting ready How to do it… How it works… There's more… See also Setting up WordPress with a Kubernetes cluster Getting ready How to do it… How it works… There's more… See also 9. Docker Security Introduction Setting Mandatory Access Control (MAC) with SELinux Getting ready How to do it… How it works… There's more… See also Allowing writes to volume mounted from the host with SELinux ON Getting ready How to do it… How it works… See also Removing capabilities to breakdown the power of a root user inside a container Getting ready How to do it... How it works… There's more... See also Sharing namespaces between the host and the container Getting ready How to do it… How it works… There's more... See also 10. Getting Help and Tips and Tricks Introduction Starting Docker in debug mode Getting ready How to do it... How it works… Building a Docker binary from the source Getting ready How to do it… How it works… There's more… See also Building images without using cached layers Getting ready How to do it… How it works… There's more… Building your own bridge for container communication Getting ready How to do it… How it works… There's more… See also Changing the default execution driver of Docker Getting ready How to do it… How it works… See also Selecting the logging driver for containers Getting ready How to do it… How it works… There's more… See also Getting real-time Docker events for containers Getting ready How to do it… How it works… There's more… See also 3. Module 3 1. Building Your Own Kubernetes Introduction Exploring architecture Getting ready How to do it… Kubernetes master API server (kube-apiserver) Scheduler (kube-scheduler) Controller manager (kube-controller-manager) Command Line Interface (kubectl) Kubernetes node kubelet Proxy (kube-proxy) How it works… etcd Overlay network Flannel See also Preparing your environment Getting ready Hardware resource Operating system How to do it… Kubernetes master Kubernetes nodes etcd See also Building datastore How to do it… Red Hat Enterprise Linux 7 or CentOS 7 Ubuntu Linux 15.10 Wily Werewolf Other Linux Download a binary Creating a user Install etcd How it works… Auto startup script Startup script (systemd) Startup script (init) Configuration See also Creating an overlay network Getting ready Installation CentOS 7 or Red Hat Enterprise Linux 7 Other Linux options How to do it… Flannel networking configuration Integrating with Docker How it works… See also Configuring master Getting ready How to do it… Installation CentOS 7 or Red Hat Enterprise Linux 7 Adding daemon dependency Other Linux options Verification See also Configuring nodes Getting ready How to do it… Installation CentOS 7 or Red Hat Enterprise Linux 7 Other Linux options Verification See also Run your first container in Kubernetes Getting ready How to do it… Running an HTTP server (nginx) Exposing the port for external access Stopping the application How it works… See also 2. Walking through Kubernetes Concepts Introduction An overview of Kubernetes control Getting ready How to do it… How it works… See also Working with pods Getting ready How to do it… How it works… See also Working with a replication controller Getting ready How to do it… Creating a replication controller Getting information of a replication controller Changing the configuration of a replication controller Removing a replication controller How it works… See also Working with services Getting ready How to do it… Creating services for different resources Creating a service for a pod Creating a service for the replication controller and adding an external IP Creating a no-selector service for an endpoint Creating a service with session affinity based on another service Creating a service in a different type Creating a service in NodePort type Deleting a service How it works… See also Working with volumes Getting ready How to do it… emptyDir hostPath nfs glusterfs iscsi flocker rbd gitRepo awsElasticBlockStore gcePersistentDisk downwardAPI There's more… PersistentVolume See also Working with secrets Getting ready How to do it… Creating a secret Picking up secret in the container Deleting a secret How it works… There's more… See also Working with names Getting ready How to do it… How it works… See also Working with namespaces Getting ready How to do it… Changing the default namespace Deleting a namespace There's more… Deleting LimitRange See also Working with labels and selectors Getting ready How to do it… Linking service with a replication controller by using label selectors There's more… See also 3. Playing with Containers Introduction Scaling your containers Getting ready How to do it… How it works… See also Updating live containers Getting ready How to do it… How it works… There's more… See also Forwarding container ports Getting ready How to do it… Container-to-container communications Pod-to-pod communications Pod-to-service communications External-to-internal communications See also Ensuring flexible usage of your containers Getting ready How to do it… Pod as a job Creating a job with multiple pods running Pod as a daemon set Running the daemon set only on specific nodes How it works… See also Working with configuration files Getting ready YAML JSON How to do it… How it works… Pods Replication controllers Services See also 4. Building a High Availability Cluster Introduction Clustering etcd Getting ready How to do it… Static etcd discovery See also Building multiple masters Getting ready How to do it… Preparing multiple master nodes Setting up kubelet in master Getting the configuration files ready Starting the kubelet service and turning daemons on! How it works… See also 5. Building a Continuous Delivery Pipeline Introduction Moving monolithic to microservices Getting ready How to do it… Microservices Frontend WebUI How it works… Microservices Frontend WebUI See also Integrating with Jenkins Getting ready Install a Jenkins server which can build a Docker program How to do it… Create your Jenkins project Run a program testing Deploying a program How it works… There's more… See also Working with the private Docker registry Getting ready How to do it… How it works… Alternatives Docker Trusted Registry Nexus Repository Manager Amazon EC2 Container Registry See also Setting up the Continuous Delivery pipeline Getting ready How to do it… How it works… There's more… See also 6. Building Kubernetes on AWS Introduction Building the Kubernetes infrastructure in AWS Getting ready How to do it… VPC and subnets Internet Gateway and NAT Route Table Security group How it works… See also Managing applications using AWS OpsWorks Getting ready How to do it… The OpsWorks stack The OpsWorks layer Adjusting the IAM role The OpsWorks instance How it works… See also Auto-deploying Kubernetes through Chef recipes Getting ready Creating ELB and its security groups Creating an OpsWorks stack Creating application layers How to do it… Stack configuration for custom recipes Recipes for etcd Recipes for the Kubernetes master Recipes for the Kubernetes node Starting the instances See also Using AWS CloudFormation for fast provisioning Getting ready How to do it… Creating a network infrastructure Creating OpsWorks for application management See also 7. Advanced Cluster Administration Introduction Advanced settings in kubeconfig Getting ready How to do it… Setting a new credential Setting a new cluster Setting and changing the current context Cleaning up kubeconfig See also Setting resource in nodes Getting ready How to do it… Managing node capacity Managing computing resources in a pod See also Playing with WebUI Getting ready How to do it… How it works… See also Working with a RESTful API Getting ready How to do it… How it works… See also Authentication and authorization Getting ready How to do it… Enabling authentication for an API call Basic authentication of etcd Basic authentication of the Kubernetes master Making use of user authorization See also 8. Logging and Monitoring Introduction Collecting application logs Getting ready Elasticsearch How to do it… Logstash Startup script Dockerfile Docker build Kubernetes replication controller and service Kibana How it works… See also Working with Kubernetes logs Getting ready How to do it… See also Working with etcd log Getting ready How to do it… See also Monitoring master and node Getting ready Updating Kubernetes to the latest version: 1.2.1 Setting up the DNS server Start the server using templates Enable Kubernetes DNS in kubelet How to do it… Installing a monitoring cluster Introducing the Grafana dashboard Creating a new metric to monitor pods See also B. Bibliography Index

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