March 2020
Intermediate to advanced
626 pages
14h 45m
English
Content preview from Mastering Service Mesh
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Namespace isolation
Istio has a sidecar primitive that's created through custom resource definition in Kubernetes. Istio configures every sidecar proxy so that they accept traffic on all of the ports and forward traffic to any configured service.
The default behavior can be fine-tuned at the sidecar level to do the following:
- Define ports and protocols that an Envoy sidecar proxy can accept
- Limit the set of services that the Envoy proxy can reach
The sidecar primitive should be used in a large service mesh for efficiency as it reduces how much memory the sidecar uses.
The following is an example of namespace isolation being done through the sidecar resource in which all of the services in the istio-lab namespace can only reach services ...
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