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Add more examples of using gateways

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Waldemar Quevedo 2019-06-26 14:07:50 -07:00 committed by GitHub
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gateways/gateway.md
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@ -3,7 +3,7 @@
The `gateway` configuration block is similar to a `cluster` block: The `gateway` configuration block is similar to a `cluster` block:
```yaml ```hcl
gateway { gateway {
name: "A" name: "A"
listen: "localhost:7222" listen: "localhost:7222"
@ -13,9 +13,9 @@ gateway {
} }
gateways: [ gateways: [
{name: "A", url: "nats-gateway://gwu:gwp@localhost:7222"}, {name: "A", url: "nats://gwu:gwp@localhost:7222"},
{name: "B", url: "nats-gateway://gwu:gwp@localhost:7333"}, {name: "B", url: "nats://gwu:gwp@localhost:7333"},
{name: "C", url: "nats-gateway://gwu:gwp@localhost:7444"}, {name: "C", url: "nats://gwu:gwp@localhost:7444"},
] ]
} }
``` ```
@ -25,8 +25,7 @@ One difference is that instead of `routes` you specify `gateways`. As expected _
Starting a server: Starting a server:
```text ```text
> nats-server -c A.conf > nats-server -c A.conf
[85803] 2019/05/07 10:50:55.902474 [INF] Starting nats-server version 2.0.0-RC11 [85803] 2019/05/07 10:50:55.902474 [INF] Starting nats-server version 2.0.0
[85803] 2019/05/07 10:50:55.902547 [INF] Git commit [not set]
[85803] 2019/05/07 10:50:55.903669 [INF] Gateway name is A [85803] 2019/05/07 10:50:55.903669 [INF] Gateway name is A
[85803] 2019/05/07 10:50:55.903684 [INF] Listening for gateways connections on localhost:7222 [85803] 2019/05/07 10:50:55.903684 [INF] Listening for gateways connections on localhost:7222
[85803] 2019/05/07 10:50:55.903696 [INF] Address for gateway "A" is localhost:7222 [85803] 2019/05/07 10:50:55.903696 [INF] Address for gateway "A" is localhost:7222
@ -83,3 +82,20 @@ The `gateways` configuration block is a list of gateway entries with the followi
| `url` | Hostport `<host>:<port>` describing where the remote gateway can be reached. If multiple IPs are returned, one is randomly selected. | | `url` | Hostport `<host>:<port>` describing where the remote gateway can be reached. If multiple IPs are returned, one is randomly selected. |
| `urls` | A list of `url` | | `urls` | A list of `url` |
By using `urls` and an array, can specify a list of endpoints that
form part of a cluster as below. A NATS Server will pick one of those
addresses randomly and only establish a single outbound gateway
connection to one of the members from another cluster:
```hcl
gateway {
name: "DC-A"
listen: "localhost:7222"
gateways: [
{name: "DC-A", urls: ["nats://localhost:7222", "nats://localhost:7223", "nats://localhost:7224"]},
{name: "DC-B", urls: ["nats://localhost:7332", "nats://localhost:7333", "nats://localhost:7334"]},
{name: "DC-C", urls: ["nats://localhost:7442", "nats://localhost:7333", "nats://localhost:7335"]}
]
}
```