Java Express Official

𝐇𝐨𝐰 𝐒𝐒𝐎/𝐒𝐀𝐌𝐋 𝐖𝐨𝐫𝐤𝐬 𝐢𝐧 𝐂𝐥𝐨𝐮𝐝❗ AssumeRole: Easily switch roles within your AWS account or between accounts for straightforward permission management. AssumeRoleWithSAML: Use SAML (a secure standard) to get credentials for users, making sure only the right people have access. AssumeRoleWithWebIdentity: For users signing in via Amazon Cognito, Google, or Facebook, AWS suggests using Cognito for a hassle-free login. GetSessionToken: Boost security by adding Multi-Factor Authentication (MFA) for users or the main AWS account holder. GetFederationToken: Great for apps acting on behalf of users, this gives temporary access to those who need it, keeping things flexible yet secure. Identity Federation in AWS: This lets you extend AWS access to users outside of AWS, without having to individually manage each user. It's great for organizations that already have their own identity systems (like Active Directory) or for apps that need to use AWS resources. 𝐊𝐞𝐲 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞: SAML 2.0 Integration: Works smoothly with well-known identity providers, granting temporary access to AWS services. Custom Identity Broker: A solution for when your identity provider isn't SAML-compatible, managing authentication and AWS access. Learn more about how SAML and AWS federation can simplify your access management, keeping your AWS resources secure and easily manageable. Dive into the world of AWS Identity Federation and unlock the full potential of your AWS resources!

What is the difference between “pull” and “push” payments? . . The diagram below shows how the pull and push payments work. 🔹 When we swipe a credit/debit card at a merchant, it is a pull payment, where the money is sent from the cardholder to the merchant. The merchant pulls money from the cardholder’s account, and the cardholder approves the transaction. 🔹 With Visa Direct or Mastercard Send, the push payments enable merchant, corporate, and government disbursements.  Step 1: The merchant initiates the push payment through a digital channel. It can be a mobile phone or a bank branch etc. Step 2: The acquiring bank creates and submits an OCT (Original Credit Transaction) to the card scheme. Step 3: The transaction is routed to the receiving institution. Step 4: The issuing bank credits the cardholder’s account and notifies the cardholder. The money is deposited into a Visa account that can be accessed at an ATM or PoS terminal or a digital wallet. Note that the push payments work for cross-border transactions. Push payments are indeed an interesting innovation, which complements the digital wallet strategy in Visa and Mastercard. The abstraction of “account” masks the complication of different funding or consuming channels.

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What is k8s (Kubernetes)? k8s is a container orchestration system. It is used for container deployment and management. Its design is greatly impacted by Google’s internal system Borg. A k8s cluster consists of a set of worker machines, called nodes, that run containerized applications. Every cluster has at least one worker node. The worker node(s) host the Pods that are the components of the application workload. The control plane manages the worker nodes and the Pods in the cluster. In production environments, the control plane usually runs across multiple computers, and a cluster usually runs multiple nodes, providing fault tolerance and high availability. 🔹 Control Plane Components 1. API Server The API server talks to all the components in the k8s cluster. All the operations on pods are executed by talking to the API server. 2. Scheduler The scheduler watches pod workloads and assigns loads on newly created pods. 3. Controller Manager The controller manager runs the controllers, including Node Controller, Job Controller, EndpointSlice Controller, and ServiceAccount Controller. 4. etcd etcd is a key-value store used as Kubernetes' backing store for all cluster data. 🔹 Nodes 1. Pods A pod is a group of containers and is the smallest unit that k8s administers. Pods have a single IP address applied to every container within the pod. 2. Kubelet An agent that runs on each node in the cluster. It ensures containers are running in a Pod. 3. Kube Proxy kube-proxy is a network proxy that runs on each node in your cluster. It routes traffic coming into a node from the service. It forwards requests for work to the correct containers.

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