September 2024
Intermediate to advanced
508 pages
16h 7m
German
Content preview from Produktion Kubernetes
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Kapitel 6. Service-Routing
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Service-Routing ist eine wichtige Funktion einer Kubernetes-basierten Plattform. Während sich die Container-Netzwerkschicht um die Low-Level-Primitive kümmert, mit denen Pods verbunden werden, benötigen Entwickler übergeordnete Mechanismen, um Dienste miteinander zu verbinden (d. h. Ost-West-Service-Routing) und um Anwendungen für ihre Kunden zugänglich zu machen (d. h. Nord-Süd-Service-Routing). Das Service-Routing umfasst drei Bereiche, die solche Mechanismen bereitstellen: Dienste, Ingress und Service Mesh.
Dienste bieten die Möglichkeit, eine Reihe von Pods als eine Einheit oder einen Netzwerkdienst zu behandeln. Sie bieten Lastausgleichs- und Routingfunktionen, die eine horizontale Skalierung von Anwendungen im gesamten Cluster ermöglichen. Außerdem bieten Services Mechanismen zur Erkennung von Diensten, die Anwendungen nutzen können, um ihre Abhängigkeiten zu erkennen und mit ihnen zu interagieren. Schließlich bieten Dienste auch Layer-3/4-Mechanismen, um Workloads für Netzwerk-Clients außerhalb des Clusters zugänglich zu machen.
Ingress ist für das Nord-Süd-Routing im Cluster zuständig. Er dient als Einstiegspunkt für die im Cluster laufenden Workloads, hauptsächlich HTTP- und HTTPS-Dienste. Ingress bietet Layer-7-Lastausgleichsfunktionen, die ein granulareres Routing des Datenverkehrs ermöglichen als die Dienste. ...
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