What to do when there is no electricity, mobile communication towers are turned off, and you want to watch the outcasts with Ukrainian cats? That’s right – buy yourself a 3/4G modem with an antenna! In addition, the antenna itself does not need power, and the modem can be inserted into an ordinary power bank,… Read More »
This time it became interesting to me – is it possible to somehow save the charge of the laptop battery? Not to say that it discharges quickly, it is enough for 5-6 hours of work, but it will not be too much, especially with the current power outages in Ukraine. Found several utilities, and will… 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 closer… Read More »
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 »
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 »
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 »
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 »
Among other features provided by Cloudflare, it can add a special header with a country value, from where a visitor came. As a Ukrainian, I’d like to ban all visitors from russia, but: redirect all visitors from russian IPs to another web domain – russki-voenny-korabl-idi-nahuy.com during this, I’d like to filter requests and leave requests… Read More »
The rtfm.co.ua blog is quite slow for users. For example, you can test your website using the https://gtmetrix.com: 4.3 seconds till full load! That’s awful. At the bottom of the results, you can check top of issues on a site: At first, the page size is 1.16 MB, which is big enough. The second thing… Read More »
The last time I’ve worked with the ELK stack about 7 years ago, see the ELK: установка Elasticsearch+Logstash+Kibana на CentOS. Currently, we are using Logz.io, but its costs going higher and higher, so we started looking at the self-hosted ELK solution to be running on our AWS Elastic Kubernetes Service clusters. So, the task, for… Read More »