title
Kubernetes Components explained! Pods, Services, Secrets, ConfigMap | Kubernetes Tutorial 14

description
Kubernetes Pods | Kubernetes Services | Kubernetes Secrets | Kubernetes ConfigMap | Kubernetes Volumes | Kubernetes Deployment | Kubernetes StatefulSet | Ingress ► Subscribe To Me On Youtube: https://bit.ly/2z5rvTV Main Kubernetes components explained: Pods, Service, Ingress, Volumes, ConfigMap, Secrets, Deployment, StatefulSet. Just enough to get you started using Kubernetes in practice as a devops engineer or software developer. Kubernetes has tons of components, but most of the time you are only working with a handful of them. This video shows you step by step how each component helps you to deploy your application and what the role of each of those components is. ▬▬▬▬▬▬ T I M E S T A M P S ⏰ ▬▬▬▬▬▬ 0:00 - Intro 0:59 - Node and Pod 3:50 - Service and Ingress 6:04 - ConfigMap and Secret 9:20 - Volumes 11:26 - Deployment and StatefulSet 16:54 - Main K8s components summarized ▬▬▬▬▬▬ Want to learn more? 🚀 ▬▬▬▬▬▬ Full Kubernetes and Docker tutorial ► https://bit.ly/2YGeRp9 What is Kubernetes? ► https://youtu.be/VnvRFRk_51k Complete Jenkins Pipeline Tutorial ► https://youtu.be/7KCS70sCoK0 #kubernetes #kubernetestutorial #devops #techworldwithnana ------------------------------------------------------------------------------------------------------- This video is the 14th of a complete series for beginners. At the end of this tutorial you will fully understand Docker and Kubernetes. The complete step-by-step guide to Docker and Kubernetes will include the following topics: 🐳 DOCKER basics: - Container concept - Why docker? (image vs. traditional DevOps) - Install docker on different operating systems - 8 basic commands you need to know (2 parts) - Docker vs. Virtual Machine - Docker in Practice: Overview of whole development process with Docker (development, continuous delivery, deployment) Probably 3-5 videos including Docker-Compose, Dockerfile, Private Repository. - Docker Volumes in theory and practice ✵ KUBERNETES basics: - Main Kubernetes components (including Pod, Service, Ingress, Volumes, ConfigMap, Secrets, Deployment, StatefulSet) - Kubernetes architecture for beginners (master, slave nodes & processes) - Understand how does K8s REALLY work? Main Concepts of how to use K8s - Minikube, Kubectl - set up the cluster and connect to it - Kubectl main commands - Demo - Configuration file (YAML) - syntax - Communication between the pods - basic networking concepts in Kubernetes - K8s Deployment in practice - example application deployment (pod + service + Ingress + secret) - K8s Volumes explained - Kubernetes Namespaces ▬▬▬▬▬▬ Courses & Bootcamp & Ebooks 🚀 ▬▬▬▬▬▬ ► Become a DevOps Engineer - full educational program 👉🏼 https://bit.ly/45mXaer ► High-Quality and Hands-On Courses 👉🏼 https://bit.ly/3BNS8Kv ► Kubernetes 101 - compact and easy-to-read ebook bundle 👉🏼 https://bit.ly/3Ozl28x ▬▬▬▬▬▬ Connect with me 👋 ▬▬▬▬▬▬ Join private Facebook group ► https://bit.ly/32UVSZP Don't forget to subscribe ► https://bit.ly/3mO4jxT DEV ► https://bit.ly/3h2fqiO INSTAGRAM ► https://bit.ly/2F3LXYJ TWITTER ► https://bit.ly/3i54PUB LINKEDIN ► https://bit.ly/3hWOLVT Legal Notice: Kubernetes and the Kubernetes logo are trademarks or registered trademarks of The Linux Foundation in the United States and/or other countries. The Linux Foundation and other parties may also have trademark rights in other terms used herein. This video is not accredited, certified, affiliated with, nor endorsed by Kubernetes or The Linux Foundation.

detail
{'title': 'Kubernetes Components explained! Pods, Services, Secrets, ConfigMap | Kubernetes Tutorial 14', 'heatmap': [{'end': 240.595, 'start': 225.044, 'weight': 0.927}, {'end': 352.758, 'start': 246.299, 'weight': 0.767}, {'end': 451.846, 'start': 360.3, 'weight': 1}, {'end': 715.98, 'start': 675.632, 'weight': 0.906}, {'end': 775.657, 'start': 735.106, 'weight': 0.747}], 'summary': 'Provides a beginner-friendly overview of fundamental kubernetes components, requiring only 30 to 40 minutes to get started, with emphasis on pod communication, networking solutions, and the use of config maps to reduce deployment cycles.', 'chapters': [{'end': 115.1, 'segs': [{'end': 49.453, 'src': 'embed', 'start': 19.513, 'weight': 1, 'content': [{'end': 25.695, 'text': "Now Kubernetes has tons of components, but most of the time you're going to be working with just a handful of them.", 'start': 19.513, 'duration': 6.182}, {'end': 31.699, 'text': 'So if you have just 30 to 40 minutes and you want to get started with Kubernetes as fast as possible,', 'start': 26.175, 'duration': 5.524}, {'end': 34.762, 'text': 'this video can actually be the perfect fit for you.', 'start': 31.699, 'duration': 3.063}, {'end': 49.453, 'text': "So I'm going to build a case of a simple JavaScript application with a simple database, and I'm going to show you, step by step,", 'start': 41.707, 'duration': 7.746}], 'summary': 'Learn kubernetes in 30-40 minutes by building a javascript app with a database.', 'duration': 29.94, 'max_score': 19.513, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk19513.jpg'}, {'end': 115.1, 'src': 'embed', 'start': 61.814, 'weight': 0, 'content': [{'end': 72.305, 'text': "So let's start with the basic setup of a worker node or, in Kubernetes terms, a node, which is a simple server, a physical or virtual machine,", 'start': 61.814, 'duration': 10.491}, {'end': 77.711, 'text': 'and the basic components or the smallest unit of Kubernetes is a pod.', 'start': 72.305, 'duration': 5.406}, {'end': 82.055, 'text': 'So what part is is basically an abstraction over a container.', 'start': 78.231, 'duration': 3.824}, {'end': 88.442, 'text': "So, if you're familiar with Docker containers or container images, so basically what part does?", 'start': 82.576, 'duration': 5.866}, {'end': 94.069, 'text': 'is it creates this running environment or a layer on top of the container?', 'start': 88.442, 'duration': 5.627}, {'end': 104.374, 'text': 'And the reason is because Kubernetes wants to abstract away the container runtime or container technologies so that you can replace them if you want to.', 'start': 94.449, 'duration': 9.925}, {'end': 113.058, 'text': "And also because you don't have to directly work with Docker or whatever container technology you use in a Kubernetes.", 'start': 104.874, 'duration': 8.184}, {'end': 115.1, 'text': 'So you only interact with the Kubernetes layer.', 'start': 113.098, 'duration': 2.002}], 'summary': 'Kubernetes abstracts container runtime, enabling easy replacement and interaction with kubernetes layer.', 'duration': 53.286, 'max_score': 61.814, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk61814.jpg'}], 'start': 0.506, 'title': 'Kubernetes fundamentals overview', 'summary': 'Provides an overview of the fundamental components of kubernetes, focusing on the basic setup of a worker node, the role of pods as the smallest unit of kubernetes, and how kubernetes abstracts container technologies for deployment, tailored for beginners and requiring only 30 to 40 minutes to get started.', 'chapters': [{'end': 115.1, 'start': 0.506, 'title': 'Kubernetes fundamentals overview', 'summary': 'Provides an overview of the fundamental components of kubernetes, focusing on the basic setup of a worker node, the role of pods as the smallest unit of kubernetes, and how kubernetes abstracts container technologies for deployment, tailored for beginners and requiring only 30 to 40 minutes to get started.', 'duration': 114.594, 'highlights': ['Kubernetes wants to abstract away the container runtime or container technologies so that you can replace them if you want to. Kubernetes abstracts container technologies for flexibility, allowing replacement of container runtimes, enhancing adaptability for different environments.', 'The video is tailored for beginners and requires only 30 to 40 minutes to get started with Kubernetes. The tutorial is designed for beginners and provides a quick start to using Kubernetes, requiring minimal time commitment of 30 to 40 minutes.', 'The basic setup of a worker node or a node in Kubernetes involves working with pods as the smallest unit. The fundamental components of Kubernetes include the basic setup of a worker node and the use of pods as the smallest unit for deployment.']}], 'duration': 114.594, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk506.jpg', 'highlights': ['Kubernetes abstracts container technologies for flexibility, allowing replacement of container runtimes, enhancing adaptability for different environments.', 'The tutorial is designed for beginners and provides a quick start to using Kubernetes, requiring minimal time commitment of 30 to 40 minutes.', 'The fundamental components of Kubernetes include the basic setup of a worker node and the use of pods as the smallest unit for deployment.']}, {'end': 359.92, 'segs': [{'end': 240.595, 'src': 'heatmap', 'start': 115.34, 'weight': 0, 'content': [{'end': 123.806, 'text': 'So we have an application pod, which is our own application, and that will maybe use a database pod with its own container.', 'start': 115.34, 'duration': 8.466}, {'end': 126.168, 'text': 'And this is also an important concept here.', 'start': 123.926, 'duration': 2.242}, {'end': 131.812, 'text': 'Pod is usually meant to run one application container inside of it.', 'start': 126.508, 'duration': 5.304}, {'end': 135.214, 'text': 'You can run multiple containers inside one pod,', 'start': 132.092, 'duration': 3.122}, {'end': 145.687, 'text': "but usually it's only the case if you have one main application container and the helper container or some side service that has to run inside of that pod.", 'start': 135.214, 'duration': 10.473}, {'end': 148.069, 'text': 'And as you see, this is nothing special.', 'start': 146.488, 'duration': 1.581}, {'end': 153.271, 'text': 'You just have one server and two containers running on it with an abstraction layer on top of it.', 'start': 148.089, 'duration': 5.182}, {'end': 156.993, 'text': "So now let's see how they communicate with each other in Kubernetes world.", 'start': 153.591, 'duration': 3.402}, {'end': 165.978, 'text': 'So Kubernetes offers out of the box a virtual network, which means that each pod gets its own IP address, not the container.', 'start': 157.454, 'duration': 8.524}, {'end': 174.122, 'text': 'The pod gets the IP address and each pod can communicate with each other using that IP address, which is an internal IP address.', 'start': 166.018, 'duration': 8.104}, {'end': 176.604, 'text': "Obviously, it's not the public one.", 'start': 174.243, 'duration': 2.361}, {'end': 181.927, 'text': 'So my application container can communicate with database using the IP address.', 'start': 177.064, 'duration': 4.863}, {'end': 191.532, 'text': 'However, pod components in Kubernetes, also an important concept, are ephemeral, which means that they can die very easily.', 'start': 182.487, 'duration': 9.045}, {'end': 198.633, 'text': 'And when that happens, for example, if I lose a database container because container crash,', 'start': 192.386, 'duration': 6.247}, {'end': 208.465, 'text': "because the application crashed inside or because the nodes the server that I'm running them on ran out resources, the pod will die.", 'start': 198.633, 'duration': 9.832}, {'end': 211.729, 'text': 'and a new one will get created in its place.', 'start': 209.346, 'duration': 2.383}, {'end': 216.294, 'text': 'And when that happens, it will get assigned a new IP address,', 'start': 212.229, 'duration': 4.065}, {'end': 221.32, 'text': 'which obviously is inconvenient if you are communicating with the database using the IP address,', 'start': 216.294, 'duration': 5.026}, {'end': 224.784, 'text': 'because now you have to adjust it every time pod restarts.', 'start': 221.32, 'duration': 3.464}, {'end': 230.13, 'text': 'And because of that, another component of Kubernetes called service is used.', 'start': 225.044, 'duration': 5.086}, {'end': 240.595, 'text': 'So service is basically a static IP address or permanent IP address that can be attached, so to say, to each pod.', 'start': 232.25, 'duration': 8.345}], 'summary': 'Kubernetes pods have their own ip addresses, and services provide a static ip for communication, ensuring reliability.', 'duration': 114.79, 'max_score': 115.34, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk115340.jpg'}, {'end': 352.758, 'src': 'heatmap', 'start': 246.299, 'weight': 0.767, 'content': [{'end': 252.443, 'text': 'And the good thing here is that the life cycles of service and the pod are not connected.', 'start': 246.299, 'duration': 6.144}, {'end': 262.72, 'text': "So even if the pod dies, the service and its IP address will stay so you don't have to change that endpoints anymore.", 'start': 252.583, 'duration': 10.137}, {'end': 268.201, 'text': 'So now, obviously, you would want your application to be accessible through a browser.', 'start': 263.54, 'duration': 4.661}, {'end': 271.822, 'text': 'Right And for this, you would have to create an external service.', 'start': 268.341, 'duration': 3.481}, {'end': 277.704, 'text': 'So external services, a service that opens the communication from external sources.', 'start': 272.222, 'duration': 5.482}, {'end': 283.35, 'text': "But obviously, you wouldn't want your database to be open to the public requests.", 'start': 278.484, 'duration': 4.866}, {'end': 287.135, 'text': 'And for that, you would create something called an internal service.', 'start': 283.811, 'duration': 3.324}, {'end': 292.642, 'text': 'So this is a type of a service that you specify when creating one.', 'start': 287.515, 'duration': 5.127}, {'end': 300.108, 'text': 'However, if you notice the URL of The external service is not very practical.', 'start': 292.802, 'duration': 7.306}, {'end': 306.77, 'text': 'So basically what you have is an HTTP protocol with a node IP address.', 'start': 300.428, 'duration': 6.342}, {'end': 311.491, 'text': 'So of the node, not the service and the port number of the service,', 'start': 307.17, 'duration': 4.321}, {'end': 317.853, 'text': 'which is good for test purposes if you want to test something very fast but not for the end product.', 'start': 311.491, 'duration': 6.362}, {'end': 323.014, 'text': 'So usually you would want your URL to look like this if you want to talk to your application.', 'start': 317.893, 'duration': 5.121}, {'end': 326.606, 'text': 'with a secure protocol and a domain name.', 'start': 323.584, 'duration': 3.022}, {'end': 331.89, 'text': 'And for that, there is another component of Kubernetes called Ingress.', 'start': 326.886, 'duration': 5.004}, {'end': 337.874, 'text': 'So instead of service, the request goes first to Ingress and it does the forwarding then to the service.', 'start': 332.31, 'duration': 5.564}, {'end': 341.976, 'text': 'So now we saw some of the very basic components of Kubernetes.', 'start': 338.715, 'duration': 3.261}, {'end': 345.437, 'text': 'And as you see, this is a very simple setup.', 'start': 343.056, 'duration': 2.381}, {'end': 352.758, 'text': 'We just have one server and a couple of containers running and some services.', 'start': 345.477, 'duration': 7.281}], 'summary': 'Kubernetes allows separate life cycles for services and pods, enabling stable ip addresses and easy external access.', 'duration': 106.459, 'max_score': 246.299, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk246299.jpg'}, {'end': 337.874, 'src': 'embed', 'start': 307.17, 'weight': 1, 'content': [{'end': 311.491, 'text': 'So of the node, not the service and the port number of the service,', 'start': 307.17, 'duration': 4.321}, {'end': 317.853, 'text': 'which is good for test purposes if you want to test something very fast but not for the end product.', 'start': 311.491, 'duration': 6.362}, {'end': 323.014, 'text': 'So usually you would want your URL to look like this if you want to talk to your application.', 'start': 317.893, 'duration': 5.121}, {'end': 326.606, 'text': 'with a secure protocol and a domain name.', 'start': 323.584, 'duration': 3.022}, {'end': 331.89, 'text': 'And for that, there is another component of Kubernetes called Ingress.', 'start': 326.886, 'duration': 5.004}, {'end': 337.874, 'text': 'So instead of service, the request goes first to Ingress and it does the forwarding then to the service.', 'start': 332.31, 'duration': 5.564}], 'summary': 'In kubernetes, ingress forwards requests to services for secure communication.', 'duration': 30.704, 'max_score': 307.17, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk307170.jpg'}], 'start': 115.34, 'title': 'Kubernetes communication and networking', 'summary': 'Introduces kubernetes application pods and their communication, emphasizing the use of helper containers and networking solutions. it also explains kubernetes networking, highlighting virtual networks, pods, services, and ingress for container communication, stability, and accessibility.', 'chapters': [{'end': 156.993, 'start': 115.34, 'title': 'Kubernetes pod communication', 'summary': 'Introduces the concept of application pods in kubernetes, emphasizing that a pod typically runs one main application container, with the possibility of additional helper containers or side services. it highlights the communication between these containers within the kubernetes environment.', 'duration': 41.653, 'highlights': ['The concept of a pod in Kubernetes is centered around running one application container inside of it, with the potential for additional helper containers or side services.', 'In Kubernetes, the communication between containers within a pod is facilitated through an abstraction layer, allowing for seamless interaction between the server and the running containers.']}, {'end': 359.92, 'start': 157.454, 'title': 'Kubernetes networking and services', 'summary': 'Explains kubernetes networking, emphasizing the use of virtual network, pods, services, and ingress for communication between containers, ensuring stability and accessibility.', 'duration': 202.466, 'highlights': ['Kubernetes offers a virtual network where each pod gets its own internal IP address, enabling communication between pods using this IP address.', 'Pod components in Kubernetes are ephemeral and can die easily, resulting in a new IP address being assigned when a pod restarts due to crashes or resource limitations.', 'The use of Kubernetes services provides a static IP address that remains unaffected by pod restarts, ensuring consistent communication with the database.', 'External services in Kubernetes enable communication from external sources, while internal services restrict public access to the database, ensuring security.', 'Kubernetes Ingress enables secure communication with the application through a domain name and secure protocol, providing a more practical and professional URL.']}], 'duration': 244.58, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk115340.jpg', 'highlights': ['In Kubernetes, the communication between containers within a pod is facilitated through an abstraction layer, allowing for seamless interaction between the server and the running containers.', 'Kubernetes Ingress enables secure communication with the application through a domain name and secure protocol, providing a more practical and professional URL.', 'The use of Kubernetes services provides a static IP address that remains unaffected by pod restarts, ensuring consistent communication with the database.', 'Kubernetes offers a virtual network where each pod gets its own internal IP address, enabling communication between pods using this IP address.', 'The concept of a pod in Kubernetes is centered around running one application container inside of it, with the potential for additional helper containers or side services.', 'External services in Kubernetes enable communication from external sources, while internal services restrict public access to the database, ensuring security.', 'Pod components in Kubernetes are ephemeral and can die easily, resulting in a new IP address being assigned when a pod restarts due to crashes or resource limitations.']}, {'end': 1088.602, 'segs': [{'end': 451.846, 'src': 'heatmap', 'start': 360.3, 'weight': 1, 'content': [{'end': 362.101, 'text': "But we're going to get there step by step.", 'start': 360.3, 'duration': 1.801}, {'end': 363.221, 'text': "So let's continue.", 'start': 362.441, 'duration': 0.78}, {'end': 370.11, 'text': 'So as we said, pots communicate with each other using a service.', 'start': 366.383, 'duration': 3.727}, {'end': 379.341, 'text': "So my application will have a database endpoint, let's say, called MongoDB service that it uses to communicate with the database.", 'start': 370.15, 'duration': 9.191}, {'end': 384.404, 'text': 'But where do you configure usually this database URL or endpoint?', 'start': 379.862, 'duration': 4.542}, {'end': 392.668, 'text': 'Usually you would do it in application properties file or as some kind of external environmental variable.', 'start': 384.704, 'duration': 7.964}, {'end': 397.13, 'text': "But usually it's inside of the built image of the application.", 'start': 393.088, 'duration': 4.042}, {'end': 407.354, 'text': 'So, for example, if the endpoint of the service or service name in this case changed to MongoDB, you would have to adjust that URL in the application.', 'start': 397.65, 'duration': 9.704}, {'end': 414.277, 'text': "So usually you'd have to rebuild the application with a new version and you have to push it to the repository.", 'start': 407.794, 'duration': 6.483}, {'end': 420.579, 'text': "And now you'll have to pull that new image in your pod and restart the whole thing.", 'start': 414.617, 'duration': 5.962}, {'end': 425.821, 'text': 'So a little bit tedious for a small change like database URL.', 'start': 420.839, 'duration': 4.982}, {'end': 430.522, 'text': 'So for that purpose, Kubernetes has a component called config map.', 'start': 425.901, 'duration': 4.621}, {'end': 435.583, 'text': "So what it does is it's basically your external configuration to your application.", 'start': 431.082, 'duration': 4.501}, {'end': 443.764, 'text': 'So config map would usually contain configuration data like URLs of a database or some other services that you use.', 'start': 435.943, 'duration': 7.821}, {'end': 451.846, 'text': 'And in Kubernetes, you just connect it to the pod so that pod actually gets the data that config map contains.', 'start': 444.244, 'duration': 7.602}], 'summary': 'Kubernetes config map simplifies updating database urls, avoiding tedious rebuilding and restarting of pods.', 'duration': 91.546, 'max_score': 360.3, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk360300.jpg'}, {'end': 459.371, 'src': 'embed', 'start': 431.082, 'weight': 0, 'content': [{'end': 435.583, 'text': "So what it does is it's basically your external configuration to your application.", 'start': 431.082, 'duration': 4.501}, {'end': 443.764, 'text': 'So config map would usually contain configuration data like URLs of a database or some other services that you use.', 'start': 435.943, 'duration': 7.821}, {'end': 451.846, 'text': 'And in Kubernetes, you just connect it to the pod so that pod actually gets the data that config map contains.', 'start': 444.244, 'duration': 7.602}, {'end': 459.371, 'text': "And now if you change the name of the service, the end point of the service, you just adjust the config map and that's it.", 'start': 452.546, 'duration': 6.825}], 'summary': 'Config map in kubernetes stores external configuration for application, including service urls and endpoints, simplifying updates.', 'duration': 28.289, 'max_score': 431.082, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk431082.jpg'}, {'end': 715.98, 'src': 'heatmap', 'start': 675.632, 'weight': 0.906, 'content': [{'end': 684.319, 'text': "replicating and managing it and making sure that it's kept on a proper hardware, et cetera, because it's not taking care of Kubernetes.", 'start': 675.632, 'duration': 8.687}, {'end': 694.627, 'text': "So now let's see everything is running perfectly and a user can access our application through a browser.", 'start': 689.222, 'duration': 5.405}, {'end': 707.852, 'text': 'Now, with this setup, what happens if my application pod dies, right? Crushes or I have to restart the pod because I built a new container image.', 'start': 695.7, 'duration': 12.152}, {'end': 715.98, 'text': 'Basically, I would have a downtime where a user can reach my application, which is obviously a very bad thing.', 'start': 708.573, 'duration': 7.407}], 'summary': 'Ensuring high availability for application on kubernetes to avoid downtime.', 'duration': 40.348, 'max_score': 675.632, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk675632.jpg'}, {'end': 775.657, 'src': 'heatmap', 'start': 735.106, 'weight': 0.747, 'content': [{'end': 744.312, 'text': 'So we would have another node where a replica or clone of our application would run, which will also be connected to the service.', 'start': 735.106, 'duration': 9.206}, {'end': 751.858, 'text': 'So remember, previously we said the service is like an persistent static IP address with a DNS name,', 'start': 744.733, 'duration': 7.125}, {'end': 756.982, 'text': "so that you don't have to constantly adjust the endpoint when pod dies.", 'start': 751.858, 'duration': 5.124}, {'end': 765.409, 'text': 'But service is also a load balancer, which means that the service will actually catch the request and forward it to whichever part is least busy.', 'start': 757.642, 'duration': 7.767}, {'end': 767.971, 'text': 'So it has both of these functionalities.', 'start': 765.729, 'duration': 2.242}, {'end': 775.657, 'text': "But in order to create the second replica of the my application pod, you wouldn't create a second pod,", 'start': 768.751, 'duration': 6.906}], 'summary': 'A service acts as a load balancer and persistent ip address for pod replication.', 'duration': 40.551, 'max_score': 735.106, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk735106.jpg'}, {'end': 901.536, 'src': 'embed', 'start': 872.339, 'weight': 1, 'content': [{'end': 882.425, 'text': 'and there you would need some kind of mechanism that manages which parts are currently writing to that storage or which parts are reading from the storage,', 'start': 872.339, 'duration': 10.086}, {'end': 885.707, 'text': 'in order to avoid data inconsistencies.', 'start': 882.425, 'duration': 3.282}, {'end': 896.073, 'text': 'And that mechanism, in addition to replicating feature, is offered by another Kubernetes component called Stateful Set.', 'start': 886.287, 'duration': 9.786}, {'end': 901.536, 'text': 'So this component is meant specifically for applications like databases.', 'start': 896.613, 'duration': 4.923}], 'summary': 'Stateful set component in kubernetes manages data consistency for databases.', 'duration': 29.197, 'max_score': 872.339, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk872339.jpg'}], 'start': 360.3, 'title': 'Kubernetes basics and config maps', 'summary': 'Covers kubernetes basics and concepts such as pods, services, ingress, and data persistence using volumes, while emphasizing the use of config maps to provide external configuration, significantly reducing deployment cycles.', 'chapters': [{'end': 472.101, 'start': 360.3, 'title': 'Kubernetes config map', 'summary': 'Discusses the use of config maps in kubernetes, which provide external configuration to applications, like database urls and service names, without the need to rebuild the application image, significantly reducing the deployment cycle.', 'duration': 111.801, 'highlights': ['Config maps in Kubernetes provide external configuration to applications, such as database URLs and service names, without the need to rebuild the application image. Config maps in Kubernetes allow for easy management of external configuration data, such as database URLs and service names, reducing the need to rebuild the application image for small changes.', 'Config maps in Kubernetes enable easy adjustment of configuration data like database URLs and service names without requiring a new image build and deployment cycle. Config maps in Kubernetes facilitate the adjustment of configuration data, such as database URLs and service names, without the necessity of building a new application image and going through the deployment cycle.', 'Config maps in Kubernetes also handle external configuration elements like database usernames and passwords, which may change without requiring a new image build and deployment. Config maps in Kubernetes are capable of managing external configuration elements like database usernames and passwords, which may change without the need for building a new application image and undergoing the deployment process.']}, {'end': 1088.602, 'start': 472.421, 'title': 'Kubernetes basics and concepts', 'summary': 'Covers the key kubernetes components including pods, services, ingress, external configuration using config maps and secrets, data persistence using volumes, and pod blueprints with replicating mechanisms like deployments and stateful sets, emphasizing the importance of stateful sets for databases.', 'duration': 616.181, 'highlights': ['Stateful sets are used specifically for stateful applications like databases, offering mechanisms for replicating the pods, scaling them up or down, and ensuring synchronized database reads and writes to avoid inconsistencies. Stateful sets are crucial for stateful applications like databases, managing replicating mechanisms, scaling, and ensuring synchronized database reads and writes.', 'Config maps and secrets are used for external configuration, with secrets storing sensitive data like passwords and certificates in a base 64 encoded format, while volumes are utilized for data persistence, attaching physical storage to pods. Config maps and secrets handle external configuration, while volumes enable data persistence by attaching physical storage to pods.', 'Pod blueprints with replicating mechanisms like deployments and stateful sets are used to create replicas of pods, with deployments offering scalability and ease of configuration, while stateful sets are specifically designed for stateful applications like databases. Pod blueprints with replicating mechanisms like deployments and stateful sets enable the creation of pod replicas, with deployments offering scalability and ease of configuration, while stateful sets are tailored for stateful applications.']}], 'duration': 728.302, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/Krpb44XR0bk/pics/Krpb44XR0bk360300.jpg', 'highlights': ['Config maps in Kubernetes provide external configuration to applications, such as database URLs and service names, without the need to rebuild the application image.', 'Stateful sets are used specifically for stateful applications like databases, offering mechanisms for replicating the pods, scaling them up or down, and ensuring synchronized database reads and writes to avoid inconsistencies.']}], 'highlights': ['The tutorial is designed for beginners and provides a quick start to using Kubernetes, requiring minimal time commitment of 30 to 40 minutes.', 'Kubernetes abstracts container technologies for flexibility, allowing replacement of container runtimes, enhancing adaptability for different environments.', 'The fundamental components of Kubernetes include the basic setup of a worker node and the use of pods as the smallest unit for deployment.', 'In Kubernetes, the communication between containers within a pod is facilitated through an abstraction layer, allowing for seamless interaction between the server and the running containers.', 'Kubernetes Ingress enables secure communication with the application through a domain name and secure protocol, providing a more practical and professional URL.', 'The use of Kubernetes services provides a static IP address that remains unaffected by pod restarts, ensuring consistent communication with the database.', 'Kubernetes offers a virtual network where each pod gets its own internal IP address, enabling communication between pods using this IP address.', 'The concept of a pod in Kubernetes is centered around running one application container inside of it, with the potential for additional helper containers or side services.', 'External services in Kubernetes enable communication from external sources, while internal services restrict public access to the database, ensuring security.', 'Pod components in Kubernetes are ephemeral and can die easily, resulting in a new IP address being assigned when a pod restarts due to crashes or resource limitations.', 'Config maps in Kubernetes provide external configuration to applications, such as database URLs and service names, without the need to rebuild the application image.', 'Stateful sets are used specifically for stateful applications like databases, offering mechanisms for replicating the pods, scaling them up or down, and ensuring synchronized database reads and writes to avoid inconsistencies.']}