148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

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Chapter 2 ■ Kubernetes on CoreOS on AWSAWSCloudFormationMaster Node(CoreOS)Worker Node(CoreOS)kube-awsLaunchConfigurationWorker Node(CoreOS)Auto ScalingGroupWorker Node(CoreOS)Figure 2-1. AWS CloudFormation for a Kubernetes clusterOverviewAWS CloudFormation provisions a collection of AWS resources based on a template, which defines theresources and the dependencies. In this chapter we shall deploy an AWS CloudFormation for a cluster ofCoreOS instances running Kubernetes. We shall use an AWS Launch Configuration and a Scaling Group forautomatically launching and scaling the CloudFormation. The kube-aws CloudFormation generator CLI toolis used to create the CloudFormation stack from a template. The stages we’ll explore are as follows:Setting the EnvironmentConfiguring AWS CredentialsInstalling kube-awsSetting Up Cluster ParametersCreating a KMS KeySetting Up an External DNS NameCreating the Cluster CloudFormationCreating an Asset DirectoryInitializing the Cluster CloudFormationRendering Contents of the Asset DirectoryCustomizing the Cluster24
Chapter 2 ■ Kubernetes on CoreOS on AWSValidating the CloudFormation StackLaunching the Cluster CloudFormationConfiguring DNSAccessing the ClusterTesting the ClusterSetting the EnvironmentThe following software is required for this chapter:• AWS Command Line Interface (CLI)• kube-aws CloudFormation GeneratorTo set up your environment, first create an Amazon EC2 instance from Amazon Linux AMI (ami-7172b611), which has the AWS CLI preinstalled. Modify the Inbound/Outbound rules to allow all traffic forall protocols in port range 0–65535 from any source and to any destination. Obtain the Public IP of the EC2instance. SSH Log in to the EC2 instance:ssh -i kubernetes-coreos.pem ec2-user@54.86.194.192The Amazon Linux command prompt is displayed. You’re now ready to go.Configuring AWS CredentialsWe need to create a set of AWS Security credentials, which we will use to configure the EC2 instance fromwhich the CloudFormation stack is launched. The AWS Security credentials used in Chapter 1 may be usedif not deleted. To create new AWS Security credentials click on Security Credentials for the user account andclick on Create New Access Key to create an access key. Copy the Access Key ID and the access key. In theAmazon Linux instance run the following command to configure the instance with the AWS credentials:aws configureSpecify the access key ID and access key when prompted. Specify the default region name (us-east-1)and the output format (json).Installing Kube-awsCoreOS applications on GitHub and packaged into AppC images are signed with the CoreOS ApplicationSigning Key. So that you’ll be able to distribute your own work, import the CoreOS Application Signing Key,as shown here:gpg2 --keyserver pgp.mit.edu --recv-key FC8A365ENext, validate the key:gpg2 --fingerprint FC8A365E25
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Page 15 and 16: About the Technical ReviewerMassimo
Page 17 and 18: ■ INTRODUCTIONpatterns are lan
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CHAPTER 14Configuring LoggingLoggin
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148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

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