Prometheus has many ready-to-use exporters, but sometimes you may need to collect your own metrics. For this, Prometheus provides client libraries that we can use to generate metrics with the necessary labels. Such an exporter can be included directly in the code of your application, or it can be run as a separate service that will poll… Read More »
We continue our engagement with GitLab and its deployment in Kubernetes. The first part – GitLab: Components, Architecture, Infrastructure, and Launching from the Helm Chart in Minikube, and now let’s get ready to deploy to AWS Elastic Kubernetes Service. What will we do and where: deploy to AWS from the Helm-chart, with some test env Kubernetes… Read More »
As GitLab recently changed the policy of providing free access, and now only 5 users will be available for the Free subscription, we decided to move to the self-hosted version. In general, they have interesting terms with the license: the price depends on the number of users, you can buy it for at least… Read More »
The very useful thing is to monitor how efficiently the cluster is being used, especially if applications are deployed by developers who do not delve into requests much and set inflated values ”in reserve”. A reserve, of course, is needed – but simply requesting resources is a bad idea. For example, you have a… Read More »
Kustomize is a configuration management tool for Kubernetes that allows you to use common sets of manifests that can be changed for each specific environment/cluster, and can be an alternative to (or complement) Helm templates. The general concept of Kustomize is “where, what, and how”: “where” is a base manifest, for example deployment.yaml “what” –… Read More »
The last time I worked with Loki when it was still in Beta, and it looked much simpler then than it does now. In the new project, there is no logging system at all, and since we all love the Grafana stack, we also decided to use Loki for logging. Although to be honest,… Read More »
The blackbox-exporter is an exporter that can monitor various endpoints – URLs on the Internet, your LoadBalancers in AWS, or Services in a Kubernetes cluster, such as MySQL or PostgreSQL databases. Blackbox Exporter can give you HTTP response time statistics, response codes, information on SSL certificates, etc. What are we going to do in this… Read More »
We have Grafana Loki for logs and need to connect an AWS IAM Role with AWS IAM Policy, which gives access to an AWS S3 bucket where Loki’s chunks and indexes will be stored. IAM roles for Kubernetes Pods will work in the same way as IAM roles to EC2 instances: a process inside… Read More »
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… Read More »
We continue with a series of posts about Apache Druid. In the first part, we took a look at the Apache Druid itself – its architecture and monitoring, in the second part – we ran a PostgreSQL cluster and set up its monitoring. Next tasks: switch Druid to PostgreSQL as metadata storage instead of Apache Derby… Read More »