Category Archives: HOWTO’s

Neo4j: graph database – run with Docker and Cypher QL examples
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28 July 2020

In contrast to the RDMS (Relational Database Management System), where data objects are the main part, in a Graph Database, the relations between such data objects are playing the main role and are represented as dedicated objects which gives better performance especially when you have a lot of small data pieces tied to each other.… Read More: Neo4j: graph database – run with Docker and Cypher QL… »

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Prometheus: yet-another-cloudwatch-exporter – collecting AWS CloudWatch metrics
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23 July 2020

Currently, to collect metrics from the AWS CloudWatch we are using AWS’s own cloudwatch-exporter, see the Prometheus: CloudWatch exporter — сбор метрик из AWS и графики в Grafana post (in Rus), but it has a few gaps: it’s written in Java, so uses CPU/memory of the monitoring host doesn’t scrapes AWS tags from resources uses… Read More: Prometheus: yet-another-cloudwatch-exporter – collecting AWS CloudWatch metrics0 (0) »

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Linux: configuring KDE Connect and connection to an Android phone
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24 June 2020

A really nice Android phone and a Linux OS integration. Besides the KDE Connect, you can use gnome-shell-extension-gsconnect if you’d prefer the Gnome project. In this post, we will set up KDE COnnect between an Android HTC phone and Arch Linux. On Android install the KDE Connect from the Play Market. On Linux, install from… Read More: Linux: configuring KDE Connect and connection to an Android phone0… »

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Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress – an overview with examples
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24 June 2020

For network communications, Kubernetes presents four Service types – ClusterIP (the default one), NodePort, LoadBalancer, and ExternalName, plus the Ingress resources. In this post, we will take a short overview of all of them, and will check how they are working. The documentation is available here – Publishing Services (ServiceTypes). I’m using AWS Elastic Kubernetes… Read More: Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress –… »

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AWS: CloudFormation – using Conditions, Fn::Equals, and Fn::If – an example
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17 May 2020

I have a CloudFormation stack with VPC Peerings, in that case, it’s a peering between VPC of a new Elastic Kubernetes Service cluster and VPC of the Prometheus monitoring stack. The EKS cluster’s stack and its whole automation creation were described in the AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation… Read More: AWS: CloudFormation – using Conditions, Fn::Equals, and Fn::If – an… »

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Docker: configure tzdata and timezone during build
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17 May 2020

During a Docker image build – it stops asking to configure the tzdata. Dockerfile at this moment is the next: FROM ubuntu:18.04 RUN apt update && apt install -y python-pip python-dev ssh python-boto3 RUN pip install ansible==2.4.3.0 Let’s reproduce – run the build: [simterm] admin@jenkins-production:~$ docker build -t proj/proj-ansible:1.1 . Sending build context to Docker… Read More: Docker: configure tzdata and timezone during build0 (0) »

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Helm: helm-secrets – sensitive data encryption with AWS KMS and use it with Jenkins
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16 May 2020

So, as a follow-up to the Helm: Kubernetes package manager – an overview, getting started post – let’s discuss about sensitive data in our Helm charts. What I want is to store a chart files in a repository, but even if such a repo will be a private Github repo – I still don’t want… Read More: Helm: helm-secrets – sensitive data encryption with AWS KMS and… »

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Jira: filters and email notifications about tickets
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10 May 2020

Last time I’ve started more working with Jira and got to know some nice and useful features. One of them is the ability to get email notifications about current/future tickets. So, a ticket has the Due Date field. By our processes – developers will sate a date here when they are expecting the task to… Read More: Jira: filters and email notifications about tickets0 (0) »

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AWS: CloudFormation – using lists in Parameters
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8 May 2020

In addition to the AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation and AWS Elastic Kubernetes Service: a cluster creation automation, part 2 – Ansible, eksctl posts – now I’d like to pass a Parameter as a List with multiply values to a CloudForamtion stack. The idea is to get all… Read More: AWS: CloudFormation – using lists in Parameters0 (0) »

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