No External Cluster Store RequiredĪll other Docker networking plugins, including Docker’s own “Overlay” driver, require that you set up Docker with a cluster store – a central database like Consul or Zookeeper – before you can even use them. You simply name containers and everything ‘just works’, including load balancing across multiple containers with the same name. Weave Net implements service discovery by providing a fast “micro DNS” server at each node. And best of all deploying a Weave container network requires zero changes to your application’s code. Every container can find the IP of any other container using a simple DNS query on the container’s name, and it can also communicate directly without NAT, without using port mappings or complicated ambassador linking. Because containers on a Weave network use standard port numbers, (for example MySQL’s default is port 3306), managing microservices is straightforward. Weave Net simplifies setting up a container network. Also one more daemon if you are using Kubernetes Network Policy. a CNI plugin which runs as a separate process). Weave Net creates a new Layer 2 network using Linux kernel features one daemon sets up that network and manages routing between machines and there are various ways to attach to that network (e.g. Similarly, existing internal systems can be opened to accept connections from application containers irrespective of their location. Services provided by application containers on the weave network can be exposed to the outside world, regardless of where they are running. Applications use the network just as if the containers were all plugged into the same network switch, without having to configure port mappings, ambassadors or links.
Docker network explained portable#
With Weave Net, portable microservices-based applications consisting of multiple containers can run anywhere: on one host, multiple hosts or even across cloud providers and data centers. Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery.
Integrating Kubernetes and Mesos via the CNI Plugin.Integrating Docker via the Network Plugin (Legacy).Integrating Docker via the Network Plugin (V2).How the Weave Net Docker Network Plugins Work.How Weave Net Interprets Network Topology.Hence, weird workarounds like usingĮxtrahosts or double name policies can be avoided.įor routing management at the overlay level. On many occasions, deployments running on multiple docker daemons do not enter into designing their networking approach, but they can have great benefits by using overlays for a number of reasons:Īmong different hosts can be easily encrypted.
Docker network explained mac#
Macvlan networks are best when you are migrating from a VM setup or need yourĬontainers to look like physical hosts on your network, each with a unique MAC
Overlay networks are best when you need containers running on different Docker hosts toĬommunicate, or when multiple applications work together using swarm services. Host, but you want other aspects of the container to be isolated. Host networks are best when the network stack should not be isolated from the Docker User-defined bridge networks are best when you need multiple containers to communicate on the same