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Update networking.md

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Wang Jie 2017-10-17 18:06:00 +08:00 committed by Misty Stanley-Jones
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10
compose/networking.md
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@ -54,7 +54,7 @@ Within the `web` container, your connection string to `db` would look like
`postgres://db:5432`, and from the host machine, the connection string would
look like `postgres://{DOCKER_IP}:8001`.
## Updating containers
## Update containers
If you make a configuration change to a service and run `docker-compose up` to update it, the old container will be removed and the new one will join the network under a different IP address but the same name. Running containers will be able to look up that name and connect to the new address, but the old address will stop working.
@ -78,13 +78,13 @@ See the [links reference](compose-file.md#links) for more information.
## Multi-host networking
> **Note**: The instructions in this section refer to [legacy Docker Swarm](/compose/swarm.md) operations, and will only work when targeting a legacy Swarm cluster. For instructions on deploying a compose project to the newer integrated swarm mode consult the [Docker Stacks](/compose/bundles.md) documentation.
> **Note**: The instructions in this section refer to [legacy Docker Swarm](/compose/swarm.md) operations, and will only work when targeting a legacy Swarm cluster. For instructions on deploying a compose project to the newer integrated swarm mode, consult the [Docker Stacks](/compose/bundles.md) documentation.
When [deploying a Compose application to a Swarm cluster](swarm.md), you can make use of the built-in `overlay` driver to enable multi-host communication between containers with no changes to your Compose file or application code.
Consult the [Getting started with multi-host networking](/engine/userguide/networking/get-started-overlay/) to see how to set up a Swarm cluster. The cluster will use the `overlay` driver by default, but you can specify it explicitly if you prefer - see below for how to do this.
## Specifying custom networks
## Specify custom networks
Instead of just using the default app network, you can specify your own networks with the top-level `networks` key. This lets you create more complex topologies and specify [custom network drivers](/engine/extend/plugins_network/) and options. You can also use it to connect services to externally-created networks which aren't managed by Compose.
@ -127,7 +127,7 @@ For full details of the network configuration options available, see the followi
- [Top-level `networks` key](compose-file.md#network-configuration-reference)
- [Service-level `networks` key](compose-file.md#networks)
## Configuring the default network
## Configure the default network
Instead of (or as well as) specifying your own networks, you can also change the settings of the app-wide default network by defining an entry under `networks` named `default`:
@ -146,7 +146,7 @@ Instead of (or as well as) specifying your own networks, you can also change the
# Use a custom driver
driver: custom-driver-1
## Using a pre-existing network
## Use a pre-existing network
If you want your containers to join a pre-existing network, use the [`external` option](compose-file.md#network-configuration-reference):