🚀 Docker Tutorial for Beginners | Master Containers & Modern DevOps 🌐🐳 - Patroni + etcd PostgreSQL HA in Docker | Auto Failover 🐘 #docker #postgresql #etcd #highavailability

Build a full Patroni + etcd PostgreSQL HA cluster in Docker with automatic failover, end-to-end. 🐘⚙️🐘 We’ll do everything on Ubuntu 24.04 LTS (your server, e.g. 192.168.136.128) using Docker + Docker Compose. ## 🔁 Optional: Bring Old Node Back as Replica You can wipe node1-data/ and rejoin node1 as a fresh Patroni member (it will clone from current leader automatically), but for this tutorial the key is: * etcd + Patroni coordinate cluster state * One leader, one replica * Leader crash → automatic promotion * Data preserved and new writes possible ## 🧾 Quick Recap (great for your slide) 1. Build Patroni+Postgres image from postgres:16 2. Run etcd as DCS in Docker 3. Configure two Patroni nodes via YAML (scope, etcd, bootstrap, postgresql) 4. Start cluster with docker compose up -d 5. Test leader/replica with psql and pg_is_in_recovery() 6. Simulate failure by stopping leader container → Patroni promotes replica automatically -------------------------------------------------------------------- ######## ⚠️ Disclaimer / अस्वीकरण ######## 1️⃣ All trademarks, logos, and names belong to their respective owners. 2️⃣ This video is made only for educational & informational purposes under Fair Use (Section 107, Copyright Act 1976). 3️⃣ No copyright infringement intended. 4️⃣ For any copyright concerns, email 📩 [email protected] — action will be taken promptly. ## 🌐 👇 Follow & Support: 🎥 YouTube: https://www.youtube.com/@ChiragMahtoOfficial 📷 Instagram: https://www.instagram.com/chirag_._mahto 💼 LinkedIn: https://linkedin.com/in/chittrmahto 📘 Facebook: https://www.facebook.com/chittrmahto 💬 WhatsApp Channel: https://whatsapp.com/channel/0029VbBgm16002T93KB16U12 💬 Telegram Channel: https://t.me/+GAATbmOU4z1mMDY9 📘 Note: Follow the process exactly as shown in the video. 💾 DM me for paid PDF/Document → 📩 [email protected] ✨ Share this tutorial with your friends & colleagues! 💬 Drop your questions in the YouTube comments — I’ll reply personally. 🔔 Subscribe for FREE tutorial and Certification Tutorials! 🔥 Don’t forget to 💛 LIKE, 💘 SHARE, 💝 COMMENT, & 💙 SUBSCRIBE to @ChiragTutorial 💯 Thanks & Regards, 💫 Chitt Ranjan Mahto — “CHIRAG” 💫 🌍 https://www.chirags.in #chiragtutorial #chirag #chittranjanmahto #chiragmahto #postgresql #patroni #etcd #docker #highavailability #autofailover #dbacluster #postgresha #devops