* Working out/testing how upgrades can be made to ingresses without downtime
* Designing and testing SSL cert rotation
* Having a strategy for image version updates (e.g. not using "latest" but how to decide when an upgrade to a newer image is or isn't acceptable)
* How to super-optimise layering or image builds including ADD vs COPY, realising that copying everything at once usually breaks this, working out where/how to perform things like OS updates
* How to correctly inject build versions from CI into the docker executable
* How to use databases inside containers with e.g. schema and data updates
* The various kubernetes network options
* How DNS works in kubernetes (and when it doesn't)
* Debugging containers that fail to start or run
* Using probes correctly and understanding ready vs liveness vs startup
* How to check for node health dynamically to control external load balancers
* Using pod anti-affinity to balance pods across all nodes
* Understanding how to lof effectively from the container
Those are a few I can think of off the top of my head.
* Working out/testing how upgrades can be made to ingresses without downtime
* Designing and testing SSL cert rotation
* Having a strategy for image version updates (e.g. not using "latest" but how to decide when an upgrade to a newer image is or isn't acceptable)
* How to super-optimise layering or image builds including ADD vs COPY, realising that copying everything at once usually breaks this, working out where/how to perform things like OS updates
* How to correctly inject build versions from CI into the docker executable
* How to use databases inside containers with e.g. schema and data updates
* The various kubernetes network options
* How DNS works in kubernetes (and when it doesn't)
* Debugging containers that fail to start or run
* Using probes correctly and understanding ready vs liveness vs startup
* How to check for node health dynamically to control external load balancers
* Using pod anti-affinity to balance pods across all nodes
* Understanding how to lof effectively from the container
Those are a few I can think of off the top of my head.