 What is a chain? A chain is a concept applied to a node that signs a skew and it is a scheduler to avoid the schedule of certain parts in a specific node. This is really powerful to avoid running some parts in any specific machine. I've got my Q&A class without any chain. My node has no chains. It means that every part is scheduler. But let's change this a bit. Let's do a key color. Date, nodes. Minus, minus all. So I'm just setting a date to all nodes. Saying that if a part is not labeled with color equal blue, then this part is no scheduler. So I'm just applying these things. So now all my nodes contain this restriction. What's happening if I do a key color applied? Sorry. Key color applied. Minus f, apps. And I deploy an application without this label. Okay, notice that the deployment has been created. But if I do key color get what? You see that it's impending. And it's impending because there is no node containing no tape. Because now all nodes contain the tape, saying that if the label is not color equal blue, then the part is not scheduler. Now let's do the next thing. Let's do a key color get nodes. Key color get nodes. Let's choose one of these nodes. This one, for example, I'm going to do a key color. Tame node. Let's set, let's say the node. And let's see, say that the color thing is going to be remu. Remu, delete, remove. Now the thing has been untainted. And if I do key color get parts, you'll see that now the part is being created. Why? Because there is now one node without containing the tape. Thanks for watching and don't forget to like the video and subscribe to the channel.