#devops
16 posts found.
devops
3 min read
We analyze the reasons why hard cuts lead to failures in L4 Load Balancer and Nginx-WebSocket architecture from the connection lifecycle perspective.
devops
4 min read
We dissect what connection state changes actually occur in L4 Load Balancer by bind, unbind, and connection draining based on the TCP lifecycle.
devops
4 min read
We decompose Connection Draining into TCP lifecycle and explain how SYN, FIN, RST, TIME_WAIT, and CLOSE_WAIT appear in actual operational indicators.
devops
4 min read
The phenomenon of connection draining not ending due to WebSocket persistent connection is analyzed from the perspective of TCP, Nginx proxy, and application, and five solutions are presented.
devops
4 min read
The Zero Downtime Deployment procedure that can actually be operated in the L4 -> Nginx -> App -> WebSocket architecture is presented in a 7-step runbook.
devops
3 min read
Actual failure patterns caused by server removal without drain, WebSocket drain failure, and keepalive setting imbalance are analyzed through symptoms, logs, causes, and solutions.
devops
4 min read
We present a practical checklist to verify Connection Draining and Graceful Shutdown readiness within 10 minutes immediately before deployment in the L4/Nginx/App/WebSocket structure.
2 min read
Flag life cycle and observation indicator operation method to automate staged deployment and rollback
2 min read
How to design autoscaling based on user experience indicators, moving away from CPU-centric scaling
2 min read
An operating pattern that determines promotion/discontinuation by automatically determining error rate and delay time in gradual deployment
2 min read
Step-by-step strategy to reduce downtime risk by decoupling application transitions from schema changes
2 min read
How to reduce infrastructure change risk by automating IaC module standards, version strategies, and policy checks
2 min read
How to reduce pipeline time by separating dependency cache and build artifact cache
2 min read
Practical operation guide that reduces the risk of confidential information exposure by combining environmental variables, vault, and KMS
2 min read
Strategies to reduce monorepo build time through change impact calculation and cache key design
2 min read
How to connect technology and budget decisions through unit-of-service cost visualization