114 lines
3.5 KiB
Plaintext
114 lines
3.5 KiB
Plaintext
---
|
|
layout: docs
|
|
page_title: 'Configuration Entry Kind: Service Splitter'
|
|
sidebar_title: service-splitter
|
|
description: >-
|
|
The service-splitter config entry kind controls how to split incoming Connect
|
|
requests across different subsets of a single service (like during staged
|
|
canary rollouts), or perhaps across different services (like during a v2
|
|
rewrite or other type of codebase migration).
|
|
---
|
|
|
|
# Service Splitter
|
|
|
|
-> **1.6.0+:** This config entry is available in Consul versions 1.6.0 and newer.
|
|
|
|
The `service-splitter` config entry kind controls how to split incoming Connect
|
|
requests across different subsets of a single service (like during staged
|
|
canary rollouts), or perhaps across different services (like during a v2
|
|
rewrite or other type of codebase migration).
|
|
|
|
If no splitter config is defined for a service it is assumed 100% of traffic
|
|
flows to a service with the same name and discovery continues on to the
|
|
resolution stage.
|
|
|
|
## Interaction with other Config Entries
|
|
|
|
- Service splitter config entries are a component of [L7 Traffic
|
|
Management](/docs/connect/l7-traffic-management).
|
|
|
|
- Service splitter config entries are restricted to only services that define
|
|
their protocol as http-based via a corresponding
|
|
[`service-defaults`](/docs/agent/config-entries/service-defaults) config
|
|
entry or globally via
|
|
[`proxy-defaults`](/docs/agent/config-entries/proxy-defaults) .
|
|
|
|
- Any split destination that specifies a different `Service` field and omits
|
|
the `ServiceSubset` field is eligible for further splitting should a splitter
|
|
be configured for that other service, otherwise resolution proceeds according
|
|
to any configured
|
|
[`service-resolver`](/docs/agent/config-entries/service-resolver).
|
|
|
|
## Sample Config Entries
|
|
|
|
Split traffic between two subsets of the same service:
|
|
|
|
```hcl
|
|
Kind = "service-splitter"
|
|
Name = "web"
|
|
Splits = [
|
|
{
|
|
Weight = 90
|
|
ServiceSubset = "v1"
|
|
},
|
|
{
|
|
Weight = 10
|
|
ServiceSubset = "v2"
|
|
},
|
|
]
|
|
```
|
|
|
|
Split traffic between two services:
|
|
|
|
```hcl
|
|
Kind = "service-splitter"
|
|
Name = "web"
|
|
Splits = [
|
|
{
|
|
Weight = 50
|
|
# will default to service with same name as config entry ("web")
|
|
},
|
|
{
|
|
Weight = 10
|
|
Service = "web-rewrite"
|
|
},
|
|
]
|
|
```
|
|
|
|
## Available Fields
|
|
|
|
- `Kind` - Must be set to `service-splitter`
|
|
|
|
- `Name` `(string: <required>)` - Set to the name of the service being configured.
|
|
|
|
- `Splits` `(array<ServiceSplit>)` - Defines how much traffic to send to which
|
|
set of service instances during a traffic split. The sum of weights across
|
|
all splits must add up to 100.
|
|
|
|
- `Weight` `(float32: 0)` - A value between 0 and 100 reflecting what portion
|
|
of traffic should be directed to this split. The smallest representable
|
|
weight is 1/10000 or .01%
|
|
|
|
- `Service` `(string: "")` - The service to resolve instead of the default.
|
|
|
|
- `ServiceSubset` `(string: "")` - A named subset of the given service to
|
|
resolve instead of one defined as that service's `DefaultSubset`. If empty
|
|
the default subset is used.
|
|
|
|
- `Namespace` `(string: "")` - The namespace to resolve the service from
|
|
instead of the current namespace. If empty the current namespace is
|
|
assumed.
|
|
|
|
## ACLs
|
|
|
|
Configuration entries may be protected by
|
|
[ACLs](https://learn.hashicorp.com/consul/security-networking/production-acls).
|
|
|
|
Reading a `service-splitter` config entry requires `service:read` on itself.
|
|
|
|
Creating, updating, or deleting a `service-splitter` config entry requires
|
|
`service:write` on itself and `service:read` on any other service referenced by
|
|
name in these fields:
|
|
|
|
- [`Splits[].Service`](#service)
|