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SaferTech Description: When you have large applications deployed with tens of thousands of containers that's that's not a practical approach so you can build your own scripts and and that will help you tackle these issues to some extent container orchestration is just a solution for that it is a solution that consists of a set of tools and scripts that can help host containers in a production environment.

Typically a container orchestration solution consists of multiple docker hosts that can host containers that way even if one fails the application is still accessible through the others the container orchestration solution easily allows you to deploy hundreds or thousands of instances of your application the single command this is a command used for docker swarm some orchestration solutions can help you automatically scale up the number of instances when users increase and scale down the number of instances when the demand decreases some solutions can even help you in automatically adding additional hosts.

To support the user load and not just clustering and scaling the container orchestration solutions also provide support for advanced networking between these containers across different hosts as well as load balancing user requests across different house they also provide support for sharing storage between the house as well as support for configuration management and security within the cluster there are multiple container orchestration solutions available today docker has docker swamp kubernetes from Google and mezzo mezz from patchy well docker swamp is really easy to set up and get started it lacks some of the advanced auto scaling features required for complex production grade applications mezzos on the other hand is quite difficult to set up and get started but supports many advanced features kubernetes arguably the most popular of it all is a bit difficult to set up and get started but provides a lot of options to customize deployments and has support for many different vendors kubernetes is now supported on all public cloud service providers like GCP azure and AWS.

And the kubernetes project is one of the top-ranked projects on github with docker you were able to run a single instance of an application using the docker CLI by running the docker run command which is great running an application has never been so easy before with kubernetes using the kubernetes CLI known as cube control you can run a thousand instance of the same application with a single command kubernetes can scale it up to 2,000 with another command kubernetes can be even configured to do this automatically so that instances and the infrastructure itself can scale up and down the user load kubernetes can upgrade these 2000 instances of the application in a rolling upgrade fashion one at a time with a single command if something goes wrong it can help you roll back these images will single command kubernetes can help you test new features of your application by only upgrading a percentage of these instances through a be testing methods the kubernetes open architecture provides support for many many different network and storage vendors any network or storage brand.

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We will now get a brief introduction to basic kubernetes concepts with docker you can run a single instance of the application with a simple docker run command in this case to run a node.js based application your only docker run nodejs command but that's just one instance of your application on one docker host what happens when the number of users increase and that instance is no longer able to handle the load you deploy additional instance of your application by running the docker run command multiple times so that's something you have to do yourself you have to keep a close watch on the load and performance of your application and deploy additional instances yourself.

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And not just that You have to keep a close watch on the health of these applications and if a container was to fail you should be able to detect that and run the docker run command again to deploy another instance of that application what about the health of the docker host itself what if the host crashes and is inaccessible the containers hosted on that host become inaccessible too so what do you do in order to solve these issues you will need a dedicated engineer who can sit and monitor the state performance and health of the containers and take necessary actions to remediate the situation.

Prix: 95 000 $.