ngrep is a command-line nix utility that analyzes network packets and searches packets on a given regex pattern. ngrep (network grep) parses text in network packets by using regular or hexadecimal expressions. In this article, we’ll learn about the feature-rich utility ngrep for a quick PCAP analysis and packet dumping.
Diese Frage habe ich mir selbst schon mehrmals gestellt. Und mindestens genauso oft wurde sie mir schon von anderen gestellt. Als Antwort kommen hier meist zuerst telnet oder netcat (nc) in den Sinn. Doch in einer RHEL-Minimal-Installation sind diese beiden Programme nicht enthalten und müssen erst nachinstalliert werden. Was tut man in diesem Fall (ohne den Paketmanager zu starten)?
Kubernetes is a container orchestration system that can manage containerized applications across a cluster of server nodes. Maintaining network connectivity between all the containers in a cluster requires some advanced networking techniques. In this
Ifyou go around and ask for a Kubernetes expert, whoever responds to your call is definitely lying. They probably are an expert in one of the many components that make a Kubernetes cluster, but I bet you there is a complete section of Kubernetes they have not touched or even heard about.
Not saying that Kubernetes is complex without reason, because it has its reasons, but it is a complex beast.
Network controllers seems to be one of those components that only very few people know how they truly work, or at least I couldn’t find many during my search for answers, and once you decide on one, and get yours up and running, you pretty much forget about it.
At Blend, we make extensive use of Kubernetes on AWS to power our infrastructure. Kubernetes has many moving parts, and most of these components are swappable, allowing us to customize clusters to our needs. An important component of any cluster is the Container Network Interface (CNI), which handles the networking for all pods running on the cluster. Choosing the right CNI for each use case is critically important and making changes, once serving production traffic, can be painful. Blend had several problems with the CNI we initially chose (Weave), leading us to explore alternatives. We eventually decided to switch and in this post, we describe the challenges and solutions to migrating without downtime.
Zero configuration or integration required — just launch and go.
Weave Scope automatically detects processes, containers, hosts. No kernel modules, no agents, no special libraries, no coding. Seamless integration with Docker, Kubernetes, DCOS and AWS ECS.
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