Author: amirajoodani
-
Why is CPU Limit Different from Memory Limit in Kubernetes?
1️⃣How Memory and CPU Work Differently? ✅ Memory (RAM): ❌ CPU: 2️⃣ Effect of limits.cpu and CFS Quota When we set limits.cpu: 500m, Kubernetes tells the Linux kernel that this container can only use 500ms of CPU time in every 1000ms window. 3️⃣ Why Should We Avoid Setting limits.cpu? Because CPU limits introduce throttling, meaning:…
-
What is ImageStream in OpenShift ?
In OpenShift, an ImageStream is a resource used to manage and track container images within the cluster. Why Use an ImageStream? How to Create an ImageStream? You can manually create an ImageStream using YAML or via the oc command. The following example creates an ImageStream for Nginx in OpenShift: Then, you can link this ImageStream…
-
What is File Descriptor in Linux ?
A File Descriptor (FD) in Linux and other Unix-based operating systems is a unique integer that refers to an open file, input/output (I/O) resource, or other types of resources like network sockets or devices. The operating system uses file descriptors to manage and access resources efficiently. How File Descriptors Work: When a process starts and…
-
what’s New in OpenShift 4.18
OpenShift 4.18 Improvement by Using Kubernetes 1.31: Top Requests for Enhancement (RFE) in OpenShift 4.18: Red Hat OpenShift 4.18 Highlights: News in OpenShift Networking 4.18:OpenShift 4.18 introduces User-Defined Networks (UDN), which provide admins with more control over the segmentation of pod networks. This allows for the creation of isolated layer 2, layer 3, or local…
-
-
-
-
linux Hardening part1-1 : Disable Unused FileSystem
In the previous section, we discussed the deactivation of a file system, which is the freevxf file server, which is the primary file system of hp-Ux servers. In general, deactivating unused file systems reduces the possibility of attacks on the system. The output of the above command will be as follows: Then enter: This command…
-
-
