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MongoDB 8 Installation Guide for CentOS 8
Install MongoDB 8 on CentOS 8 This guide provides the correct steps to install MongoDB 8.0 on CentOS 8 / RHEL 8 / Rocky Linux 8 / AlmaLinux 8. 1. Add MongoDB YUM Repository Create a repo file: sudo nano /etc/yum.repos.d/mongodb-org-8.0.repo Paste: [mongodb-o...
Install PostgreSQL 16.9 on CentOS 8
Install PostgreSQL 16.9 on CentOS 8 / CentOS Stream 8 1. Disable Built‑in PostgreSQL Module sudo dnf -qy module disable postgresql 2. Add Official PostgreSQL (PGDG) Repo sudo dnf install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-8-x86_64/pg...
PostgreSQL 16 + Debezium CDC Setup Guide
PostgreSQL 16 + Debezium CDC Setup Guide (Step-by-Step) This document explains: Enabling PostgreSQL password login Creating database + users Setting replication permissions Configuring PostgreSQL for Debezium Installing Debezium PostgreSQL Kafka plugin Creati...
Create table and test
Connect to PostgreSQL If your DB name is mydb: psql -U postgres -W -d mydb OR using the Debezium user (read-only but good for testing SELECT): psql -U debezium -W -d mydb ✅ 2. Create a table Inside psql: CR...
CDC streaming pipeline from PostgreSQL → Kafka → Flink → ClickHouse.
sudo wget https://repo1.maven.org/maven2/com/clickhouse/flink/flink-connector-clickhouse-2.0.0/0.1.1/flink-connector-clickhouse-2.0.0-0.1.1-all.jar wget https://repo1.maven.org/maven2/org/apache/flink/flink-connector-kafka/3.1.0-1.18/flink-connector-kafka-3...
Jar create
mvn clean package -DskipTests mvn clean install
Test Grpc
First run the grpcurl docker run --rm -v $(pwd):/proto fullstorydev/grpcurl \ -plaintext \ -import-path /proto \ -proto myservice.proto \ 172.16.2.82:30490 list Output: election.ElectionScheduleService Then List all RPC methods docker run --rm -v $(pw...
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nscache 65536nserver 8.8.8.8nserver 8.8.4.4 config /conf/3proxy.cfgmonitor /conf/3proxy.cfg log /logs/3proxy-%y%m%d.log Drotate 60counter /count/3proxy.3cf users $/conf/passwd include /conf/countersinclude /conf/bandlimiters auth strongdeny * * 127.0.0.1a...
squid
Based on the project structure, this is a Laravel 10 PHP application for managing Squid proxy users. Here's how to run it: Quick Start 1. Install Dependencies composer install npm install 2. Configure Environment Since you have .env open, make ...
Some Essential checks
Check keeper : echo ruok | nc 127.0.0.1 9181 sudo systemctl restart clickhouse-keeper Check cluster SELECT * FROM system.clusters WHERE cluster='default'; Additional Keeper tests Cluster monitoring echo mntr | nc 127.0.0.1 918...
Create db and replicated tables
Build Replicated ClickHouse Tables Keeper is fully working.Now you can create replicated database + replicated tables that sync across all 3 servers. 🚀 Step-by-step instructions (copy/paste) 1. Create database on all nodes: CREATE DATABASE re...
New Page
CREATE TABLE my_table ON CLUSTER default ( `id` UInt64, `name` String, `created_at` String ) ENGINE = MergeTree ORDER BY id INSERT INTO demo.my_table (id, name, created_at) VALUES(0, '228', ''); select * from my_table INSERT INTO demo.my_tab...
Too many open files debug in k8s
ulimit -n Output : 1048576 kubelet limit systemctl show kubelet | grep NOFILE Output : LimitNOFILE=524288 LimitNOFILESoft=1024 systemd global systemctl show --property=DefaultLimitNOFILE Output: DefaultLimitNOFILE=524288 container runtime systemctl show con...
Log raoted policy enforcement
Final logrotate config for access.json Create / edit: sudo nano /etc/logrotate.d/nginx-access-json Paste exactly this: /var/log/nginx/access.json { daily rotate 30 maxsize 30G missingok notifempty c...