Do I need an airport transit visa or a Schengen visa? Zurich Airport allows transit without a transit visa or a Schengen visa to many countries, including India, South Africa, and Bhutan. Please check your country on official website https://www.eda.admin.ch/countries/india/en/home/visa/entry-ch/transit/do-i-need-an-airport-transit-visa.html A Schengen visa is needed only if you intend to step outside the airport.

My requirements are running/installing a few Linux kernel tools hosted on a Mac OS laptop (MacBook Air x86–64). I tried the following options: Docker Image VMplayer/VirtualBox Ubuntu Ubnutu Multipass The first two options are familiar. But I rejected them for different reasons. The docker engine on Mac does not support…

Google created the SRE role. The idea of software engineering for operations is an exciting approach. My observation for a few months of SRE work is as follows: SRE does a lot of development Unlike a typical ops role, a development project is normal to your work. Each quarter's planning includes a couple of medium sizes…

Problem

It’s not a good idea to check an interface for nil. Try the following code: type user interface{} type staff struct{} func compareNil() { var generic user generic = nil // works as expected fmt.Printf("value=%v type=%T (generic==nil)=%v\n", generic, generic, generic == nil) generic = (*staff)(nil) //…

A short read — https://shopify.engineering/mobius-shopify-unified-edge What is the Problem? The traffic could be ingress from multiple sources. Edge could support a few types of applications only. It was hard to onboard a new service to the edge. Observability of overall traffic was missing or incomplete. What’s an Edge? The edge is a boundary…

What is Strategy Pattern — The strategy is a behavior pattern. It fits where multiple choices for an interface are available and the design would allow switching them dynamically. Conditions A set of choices with similarities in the interface Dynamic update of a choice Example A cache with evictions Multiple eviction algorithms A cache could switch to…

The answer is Maglev. Maglev is a L3/L4 software load balancer. A load balancer such as Nginx, and HAProxy distributes requests among multiple backend services. Goals It should allow seamless scalability so a set of load-balancers can be added/removed and the user does not notice any connection drop. A set of…

migrate Database migrations tool is written in Go. Use as CLI or import as a library. Migrate reads migrations from sources and applies them in the correct order to a database. The migration tool uses a schema_migrations table. One table exists for one DB. mysql> select * from schema_migrations; +---------+-------+ | version |…