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Karl Cardenas 2022-02-03 18:07:05 -07:00
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website/content/docs/intro/usecases/what-is-a-service-mesh.mdx
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@ -27,7 +27,12 @@ Some of the benefits of a service mesh include;
- network automation - network automation
A common use case for leveraging a service mesh is to achieve a [_zero trust_ model](/use-cases/zero-trust-networking). A common use case for leveraging a service mesh is to achieve a [_zero trust_ model](/use-cases/zero-trust-networking).
In a _zero trust_ model, applications require identity-based access to ensure all communication within the service mesh is authenticated with TLS certificates and encrypted in transit. In a zero trust model, applications require identity-based access to ensure all communication within the service mesh is authenticated with TLS certificates and encrypted in transit.
In traditional security strategies, protection is primarily focused at the perimeter of a network.
In cloud environments, the surface area for network access is much wider than the traditional on-premises networks.
In addition, traditional security practices overlook the fact that many bad actors can originate from within the network walls.
A zero trust model addresses these concerns while allowing organizations to scale as needed.
## How does a Service Mesh work? ## How does a Service Mesh work?
@ -64,7 +69,7 @@ A service mesh can be connected to another service mesh in another data center o
Modern infrastructure is transitioning from being primarily static to dynamic in nature (ephemeral). Modern infrastructure is transitioning from being primarily static to dynamic in nature (ephemeral).
This dynamic infrastructure has a short life cycle, meaning virtual machines (VM) and containers are frequently recycled. This dynamic infrastructure has a short life cycle, meaning virtual machines (VM) and containers are frequently recycled.
It's difficult for an organization to manage and keep track of application services that live on short-lived resources. A service mesh solves this problem by acting as a central registry of all registered services. It's difficult for an organization to manage and keep track of application services that live on short-lived resources. A service mesh solves this problem by acting as a central registry of all registered services.
As service instances, either VMs or containers, come up and down, the mesh is aware of their state and availability. The ability to conduct _service discovery_ is the foundation to the other problems a service mesh solves. As instances of a service (e.g., VM, container, serverless functions) come up and down, the mesh is aware of their state and availability. The ability to conduct _service discovery_ is the foundation to the other problems a service mesh solves.
As a service mesh is aware of the state of a service and its instances, the mesh can implement more intelligent and dynamic network routing. As a service mesh is aware of the state of a service and its instances, the mesh can implement more intelligent and dynamic network routing.
Many service meshes offer L7 traffic management capabilities. As a result, operators and developers can create powerful rules to direct network traffic as needed, such as load balancing, traffic splitting, dynamic failover, and custom resolvers. Many service meshes offer L7 traffic management capabilities. As a result, operators and developers can create powerful rules to direct network traffic as needed, such as load balancing, traffic splitting, dynamic failover, and custom resolvers.