Category Archives: Virtualization

In computing, virtualization refers to the act of creating a virtual version of something, including virtual computer hardware platforms, storage devices, and computer network resources.

Pritunl: running VPN in Kubernetes
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5 October 2022

Pritunl is a VPN server with a bunch of advanced security and access control features. In fact, it is just a wrapper over OpenVPN, adding such Access Control Lists to it in the form of Organizations, users, and routes. The task is to deploy a Pritunl test instance in Kubernetesб so we can take a closer… Read More: Pritunl: running VPN in Kubernetes0 (0) »

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Kubernetes: Minikube, and a LoadBalancer in the Pending status
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5 October 2022

After running Pritunl in Minikube, it is not possible to connect to the VPN: … 2022-10-03 13:50:32 TCP/UDP: Preserving recently used remote address: [AF_INET]194.168.3.100:1194 2022-10-03 13:50:32 UDP link local: (not bound) 2022-10-03 13:50:32 UDP link remote: [AF_INET]194.168.3.100:1194 … Check its Kubernetes Service: [simterm] $ kubectl -n pritunl-local get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE… Read More: Kubernetes: Minikube, and a LoadBalancer in the Pending status0 (0) »

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PostgreSQL: PostgreSQL Operator for Kubernetes, and its Prometheus monitoring
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23 September 2022

So, we’ve launched Druid, see Apache Druid: Overview, Running in Kubernetes, and Monitoring with Prometheus . So far, a local Apache Derby database is used as the default storage for metadata . Next, we will switch Druid to PostgreSQL, and later we will remove ZooKeeper from the cluster setup. To begin with, let’s start a PostgreSQL cluster in Kubernetes, add… Read More: PostgreSQL: PostgreSQL Operator for Kubernetes, and its Prometheus monitoring0 (0) »

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Apache Druid: overview, running in Kubernetes and monitoring with Prometheus
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18 September 2022

Apache Druid is a columnar database, focused on working with large amounts of data, combining the features and benefits of Time-Series Database, Data Warehouse, and a search engine. The general task is to set up monitoring of the Druid cluster in Kubernetes, so at first, we will see what it is in general and how… Read More: Apache Druid: overview, running in Kubernetes and monitoring with Prometheus0… »

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AWS: VPC Flow Logs – an overview and example with CloudWatch Logs Insights
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19 July 2022

AWS VPC Flow Logs allow you to log traffic information between network interfaces in a VPC. Further, these logs can be stored in AWS S3 or sent to AWS CloudWatch Logs, while enabling traffic logging does not affect the performance of the network interface in any way. Let’s briefly review the basic concepts, and available… Read More: AWS: VPC Flow Logs – an overview and example with… »

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AWS: Trusted Advisor, part 2 – CloudWatch Alarms and Slack notifications
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29 November 2021

Continuing with the theme of the AWS Trusted Advisor service, let’s see how can we configure notifications about new findings. The first part: AWS: Trusted Advisor, part 1 – its features overview. To have notifications, we can use Trusted Advisor metrics from the CloudWatch, see their list on the Trusted Advisor metrics and dimensions page.… Read More: AWS: Trusted Advisor, part 2 – CloudWatch Alarms and Slack… »

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AWS: Trusted Advisor, part 1 – its features overview
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29 November 2021

AWS Trusted Advisor is another service that allows monitoring your accountant its resources in use for their cost-effectiveness, performance, security, and more. Keep in mind, that Trusted Advisor’s checks that are available for you depend on the AWS Support Plan of your account. вашего аккаунта. Fortunately, we have Premium so I’m able to how all… Read More: AWS: Trusted Advisor, part 1 – its features overview0 (0) »

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AWS: Cost optimization – services expenses overview and traffic costs in AWS
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3 November 2021

Let’s proceed with our journey on AWS Cost Optimization topics. Previous parts – AWS: Cost Explorer – costs checking on the CloudWatch Logs example and AWS: cost optimization – purchasing RDS Reserved Instances. One of the shortcomings of the cloud-based architecture is the fact, that it can cost much more than when using own bare-metal… Read More: AWS: Cost optimization – services expenses overview and traffic costs… »

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AWS: Lambda – copy EC2 tags to its EBS, part 2 – create a Lambda function
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13 October 2021

let’s proceed in our journey of the AWS Lambda function, which will copy an EC2’s AWS Tags to all EBS volumes, attached to it. In the first part, AWS: Lambda — copy EC2 tags to its EBS, part 1 – Python and boto3, we wrote a Python script that can get all EC2 instances in… Read More: AWS: Lambda – copy EC2 tags to its EBS, part… »

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