781c6aaafa
- add `/api/providers/{provider}/frontends/{frontend}/routes`
- add `/api/providers/{provider}/frontends/{frontend}/routes/{route}`
734 lines
18 KiB
Markdown
734 lines
18 KiB
Markdown
|
||
___
|
||
|
||
|
||
# <a id="top"></a> Documentation
|
||
|
||
* [Basics](#basics)
|
||
* [Global configuration](#global)
|
||
* [File backend](#file)
|
||
* [API backend](#api)
|
||
* [Docker backend](#docker)
|
||
* [Mesos/Marathon backend](#marathon)
|
||
* [Consul backend](#consul)
|
||
* [Etcd backend](#etcd)
|
||
* [Zookeeper backend](#zk)
|
||
* [Boltdb backend](#boltdb)
|
||
* [Benchmarks](#benchmarks)
|
||
|
||
|
||
## <a id="basics"></a> Basics
|
||
|
||
|
||
Træfɪk is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
|
||
It supports several backends ([Docker :whale:](https://www.docker.com/), [Mesos/Marathon](https://mesosphere.github.io/marathon/), [Consul](https://consul.io/), [Etcd](https://coreos.com/etcd/), Rest API, file...) to manage its configuration automatically and dynamically.
|
||
|
||
Basically, Træfɪk is a http router, which sends traffic from frontends to http backends, following rules you have configured.
|
||
|
||
### Frontends
|
||
|
||
Frontends can be defined using the following rules:
|
||
|
||
* `Headers`: Headers adds a matcher for request header values. It accepts a sequence of key/value pairs to be matched. For example: `application/json`
|
||
* `HeadersRegexp`: Regular expressions can be used with headers as well. It accepts a sequence of key/value pairs, where the value has regex support. For example: `application/(text|json)`
|
||
* `Host`: Host adds a matcher for the URL host. It accepts a template with zero or more URL variables enclosed by `{}`. Variables can define an optional regexp pattern to be matched: `www.traefik.io`, `{subdomain:[a-z]+}.traefik.io`
|
||
* `Methods`: Methods adds a matcher for HTTP methods. It accepts a sequence of one or more methods to be matched, e.g.: `GET`, `POST`, `PUT`
|
||
* `Path`: Path adds a matcher for the URL path. It accepts a template with zero or more URL variables enclosed by `{}`. The template must start with a `/`. For exemple `/products/` `/articles/{category}/{id:[0-9]+}`
|
||
* `PathPrefix`: PathPrefix adds a matcher for the URL path prefix. This matches if the given template is a prefix of the full URL path.
|
||
|
||
|
||
A frontend is a set of rules that forwards the incoming http traffic to a backend.
|
||
|
||
### HTTP Backends
|
||
|
||
A backend is responsible to load-balance the traffic coming from one or more frontends to a set of http servers.
|
||
Various methods of load-balancing is supported:
|
||
|
||
* `wrr`: Weighted Round Robin
|
||
* `drr`: Dynamic Round Robin: increases weights on servers that perform better than others. It also rolls back to original weights if the servers have changed.
|
||
|
||
A circuit breaker can also be applied to a backend, preventing high loads on failing servers.
|
||
It can be configured using:
|
||
|
||
* Methods: `LatencyAtQuantileMS`, `NetworkErrorRatio`, `ResponseCodeRatio`
|
||
* Operators: `AND`, `OR`, `EQ`, `NEQ`, `LT`, `LE`, `GT`, `GE`
|
||
|
||
For example:
|
||
* `NetworkErrorRatio() > 0.5`
|
||
* `LatencyAtQuantileMS(50.0) > 50`
|
||
* `ResponseCodeRatio(500, 600, 0, 600) > 0.5`
|
||
|
||
## <a id="global"></a> Global configuration
|
||
|
||
```toml
|
||
# traefik.toml
|
||
################################################################
|
||
# Global configuration
|
||
################################################################
|
||
|
||
# Reverse proxy port
|
||
#
|
||
# Optional
|
||
# Default: ":80"
|
||
#
|
||
# port = ":80"
|
||
|
||
# Timeout in seconds.
|
||
# Duration to give active requests a chance to finish during hot-reloads
|
||
#
|
||
# Optional
|
||
# Default: 10
|
||
#
|
||
# graceTimeOut = 10
|
||
|
||
# Traefik logs file
|
||
# If not defined, logs to stdout
|
||
#
|
||
# Optional
|
||
#
|
||
# traefikLogsFile = "log/traefik.log"
|
||
|
||
# Access logs file
|
||
#
|
||
# Optional
|
||
#
|
||
# accessLogsFile = "log/access.log"
|
||
|
||
# Log level
|
||
#
|
||
# Optional
|
||
# Default: "ERROR"
|
||
#
|
||
# logLevel = "ERROR"
|
||
|
||
# SSL certificate and key used
|
||
#
|
||
# Optional
|
||
#
|
||
# CertFile = "traefik.crt"
|
||
# KeyFile = "traefik.key"
|
||
```
|
||
|
||
|
||
## <a id="file"></a> File backend
|
||
|
||
Like any other reverse proxy, Træfɪk can be configured with a file. You have two choices:
|
||
|
||
* simply add your configuration at the end of the global configuration file `traefik.toml` :
|
||
|
||
```toml
|
||
# traefik.toml
|
||
port = ":80"
|
||
graceTimeOut = 10
|
||
logLevel = "DEBUG"
|
||
|
||
[file]
|
||
|
||
# rules
|
||
[backends]
|
||
[backends.backend1]
|
||
[backends.backend1.circuitbreaker]
|
||
expression = "NetworkErrorRatio() > 0.5"
|
||
[backends.backend1.servers.server1]
|
||
url = "http://172.17.0.2:80"
|
||
weight = 10
|
||
[backends.backend1.servers.server2]
|
||
url = "http://172.17.0.3:80"
|
||
weight = 1
|
||
[backends.backend2]
|
||
[backends.backend2.LoadBalancer]
|
||
method = "drr"
|
||
[backends.backend2.servers.server1]
|
||
url = "http://172.17.0.4:80"
|
||
weight = 1
|
||
[backends.backend2.servers.server2]
|
||
url = "http://172.17.0.5:80"
|
||
weight = 2
|
||
|
||
[frontends]
|
||
[frontends.frontend1]
|
||
backend = "backend2"
|
||
[frontends.frontend1.routes.test_1]
|
||
rule = "Host"
|
||
value = "test.localhost"
|
||
[frontends.frontend2]
|
||
backend = "backend1"
|
||
[frontends.frontend2.routes.test_2]
|
||
rule = "Path"
|
||
value = "/test"
|
||
```
|
||
|
||
* or put your rules in a separate file, for example `rules.tml`:
|
||
|
||
```toml
|
||
# traefik.toml
|
||
port = ":80"
|
||
graceTimeOut = 10
|
||
logLevel = "DEBUG"
|
||
|
||
[file]
|
||
filename = "rules.toml"
|
||
```
|
||
|
||
```toml
|
||
# rules.toml
|
||
[backends]
|
||
[backends.backend1]
|
||
[backends.backend1.circuitbreaker]
|
||
expression = "NetworkErrorRatio() > 0.5"
|
||
[backends.backend1.servers.server1]
|
||
url = "http://172.17.0.2:80"
|
||
weight = 10
|
||
[backends.backend1.servers.server2]
|
||
url = "http://172.17.0.3:80"
|
||
weight = 1
|
||
[backends.backend2]
|
||
[backends.backend2.LoadBalancer]
|
||
method = "drr"
|
||
[backends.backend2.servers.server1]
|
||
url = "http://172.17.0.4:80"
|
||
weight = 1
|
||
[backends.backend2.servers.server2]
|
||
url = "http://172.17.0.5:80"
|
||
weight = 2
|
||
|
||
[frontends]
|
||
[frontends.frontend1]
|
||
backend = "backend2"
|
||
[frontends.frontend1.routes.test_1]
|
||
rule = "Host"
|
||
value = "test.localhost"
|
||
[frontends.frontend2]
|
||
backend = "backend1"
|
||
[frontends.frontend2.routes.test_2]
|
||
rule = "Path"
|
||
value = "/test"
|
||
|
||
```
|
||
|
||
If you want Træfɪk to watch file changes automatically, just add:
|
||
|
||
```toml
|
||
[file]
|
||
watch = true
|
||
```
|
||
|
||
## <a id="api"></a> API backend
|
||
|
||
Træfik can be configured using a restful api.
|
||
To enable it:
|
||
|
||
```toml
|
||
[web]
|
||
address = ":8080"
|
||
|
||
# SSL certificate and key used
|
||
#
|
||
# Optional
|
||
#
|
||
# CertFile = "traefik.crt"
|
||
# KeyFile = "traefik.key"
|
||
```
|
||
|
||
* `/`: provides a simple HTML frontend of Træfik
|
||
|
||
|
||
|
||
* `/health`: `GET` json metrics
|
||
|
||
```sh
|
||
$ curl -s "http://localhost:8080/health" | jq .
|
||
{
|
||
"average_response_time_sec": 0,
|
||
"average_response_time": "0",
|
||
"total_response_time_sec": 0,
|
||
"total_response_time": "0",
|
||
"total_count": 0,
|
||
"pid": 12861,
|
||
"uptime": "7m12.80607635s",
|
||
"uptime_sec": 432.80607635,
|
||
"time": "2015-09-22 10:25:16.448023473 +0200 CEST",
|
||
"unixtime": 1442910316,
|
||
"status_code_count": {},
|
||
"total_status_code_count": {},
|
||
"count": 0
|
||
}
|
||
```
|
||
|
||
* `/api`: `GET` configuration for all providers
|
||
|
||
```sh
|
||
$ curl -s "http://localhost:8080/api" | jq .
|
||
{
|
||
"file": {
|
||
"Frontends": {
|
||
"frontend2": {
|
||
"Routes": {
|
||
"test_2": {
|
||
"Value": "/test",
|
||
"Rule": "Path"
|
||
}
|
||
},
|
||
"Backend": "backend1"
|
||
},
|
||
"frontend1": {
|
||
"Routes": {
|
||
"test_1": {
|
||
"Value": "test.localhost",
|
||
"Rule": "Host"
|
||
}
|
||
},
|
||
"Backend": "backend2"
|
||
}
|
||
},
|
||
"Backends": {
|
||
"backend2": {
|
||
"LoadBalancer": {
|
||
"Method": "drr"
|
||
},
|
||
"CircuitBreaker": null,
|
||
"Servers": {
|
||
"server2": {
|
||
"Weight": 2,
|
||
"URL": "http://172.17.0.5:80"
|
||
},
|
||
"server1": {
|
||
"Weight": 1,
|
||
"URL": "http://172.17.0.4:80"
|
||
}
|
||
}
|
||
},
|
||
"backend1": {
|
||
"LoadBalancer": {
|
||
"Method": "wrr"
|
||
},
|
||
"CircuitBreaker": {
|
||
"Expression": "NetworkErrorRatio() > 0.5"
|
||
},
|
||
"Servers": {
|
||
"server2": {
|
||
"Weight": 1,
|
||
"URL": "http://172.17.0.3:80"
|
||
},
|
||
"server1": {
|
||
"Weight": 10,
|
||
"URL": "http://172.17.0.2:80"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
- `/api/providers`: `GET` providers
|
||
- `/api/providers/{provider}`: `GET` or `PUT` provider
|
||
- `/api/providers/{provider}/backends`: `GET` backends
|
||
- `/api/providers/{provider}/backends/{backend}`: `GET` a backend
|
||
- `/api/providers/{provider}/backends/{backend}/servers`: `GET` servers in a backend
|
||
- `/api/providers/{provider}/backends/{backend}/servers/{server}`: `GET` a server in a backend
|
||
- `/api/providers/{provider}/frontends`: `GET` frontends
|
||
- `/api/providers/{provider}/frontends/{frontend}`: `GET` a frontend
|
||
- `/api/providers/{provider}/frontends/{frontend}/routes`: `GET` routes in a frontend
|
||
- `/api/providers/{provider}/frontends/{frontend}/routes/{route}`: `GET` a route in a frontend
|
||
|
||
|
||
## <a id="docker"></a> Docker backend
|
||
|
||
Træfɪk can be configured to use Docker as a backend configuration:
|
||
|
||
```toml
|
||
################################################################
|
||
# Docker configuration backend
|
||
################################################################
|
||
|
||
# Enable Docker configuration backend
|
||
#
|
||
# Optional
|
||
#
|
||
[docker]
|
||
|
||
# Docker server endpoint. Can be a tcp or a unix socket endpoint.
|
||
#
|
||
# Required
|
||
#
|
||
endpoint = "unix:///var/run/docker.sock"
|
||
|
||
# Default domain used.
|
||
# Can be overridden by setting the "traefik.domain" label on a container.
|
||
#
|
||
# Required
|
||
#
|
||
domain = "docker.localhost"
|
||
|
||
# Enable watch docker changes
|
||
#
|
||
# Optional
|
||
#
|
||
watch = true
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "docker.tmpl"
|
||
```
|
||
|
||
|
||
Labels can be used on containers to override default behaviour:
|
||
|
||
* `traefik.backend=foo`: assign the container to `foo` backend
|
||
* `traefik.port=80`: register this port. Useful when the container exposes multiples ports.
|
||
* `traefik.weight=10`: assign this weight to the container
|
||
* `traefik.enable=false`: disable this container in Træfɪk
|
||
* `traefik.host=bar`: override the default routing from {containerName}.{domain} to bar.{domain}
|
||
|
||
## <a id="marathon"></a> Marathon backend
|
||
|
||
Træfɪk can be configured to use Marathon as a backend configuration:
|
||
|
||
|
||
```toml
|
||
################################################################
|
||
# Mesos/Marathon configuration backend
|
||
################################################################
|
||
|
||
# Enable Marathon configuration backend
|
||
#
|
||
# Optional
|
||
#
|
||
[marathon]
|
||
|
||
# Marathon server endpoint.
|
||
# You can also specify multiple endpoint for Marathon:
|
||
# endpoint := "http://10.241.1.71:8080,10.241.1.72:8080,10.241.1.73:8080"
|
||
#
|
||
# Required
|
||
#
|
||
endpoint = "http://127.0.0.1:8080"
|
||
|
||
# Network interface used to call Marathon web services
|
||
# Optional
|
||
# Default: "eth0"
|
||
#
|
||
# networkInterface = "eth0"
|
||
|
||
# Enable watch Marathon changes
|
||
#
|
||
# Optional
|
||
#
|
||
watch = true
|
||
|
||
# Default domain used.
|
||
# Can be overridden by setting the "traefik.domain" label on an application.
|
||
#
|
||
# Required
|
||
#
|
||
domain = "marathon.localhost"
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "marathon.tmpl"
|
||
```
|
||
|
||
Labels can be used on containers to override default behaviour:
|
||
|
||
* `traefik.backend=foo`: assign the application to `foo` backend
|
||
* `traefik.port=80`: register this port. Useful when the application exposes multiples ports.
|
||
* `traefik.weight=10`: assign this weight to the application
|
||
* `traefik.enable=false`: disable this application in Træfɪk
|
||
* `traefik.host=bar`: override the default routing from {appName}.{domain} to bar.{domain}
|
||
* `traefik.prefixes=pf1,pf2`: use PathPrefix(es) instead of hostname for routing, use filename="providerTemplates/marathon-prefix.tmpl" with this option
|
||
|
||
## <a id="consul"></a> Consul backend
|
||
|
||
Træfɪk can be configured to use Consul as a backend configuration:
|
||
|
||
```toml
|
||
################################################################
|
||
# Consul KV configuration backend
|
||
################################################################
|
||
|
||
# Enable Consul KV configuration backend
|
||
#
|
||
# Optional
|
||
#
|
||
[consul]
|
||
|
||
# Consul server endpoint
|
||
#
|
||
# Required
|
||
#
|
||
endpoint = "http://127.0.0.1:8500"
|
||
|
||
# Enable watch Consul changes
|
||
#
|
||
# Optional
|
||
#
|
||
watch = true
|
||
|
||
# Prefix used for KV store.
|
||
#
|
||
# Optional
|
||
#
|
||
prefix = "traefik"
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "consul.tmpl"
|
||
```
|
||
|
||
## <a id="etcd"></a> Etcd backend
|
||
|
||
Træfɪk can be configured to use Etcd as a backend configuration:
|
||
|
||
```toml
|
||
################################################################
|
||
# Etcd configuration backend
|
||
################################################################
|
||
|
||
# Enable Etcd configuration backend
|
||
#
|
||
# Optional
|
||
#
|
||
# [etcd]
|
||
|
||
# Etcd server endpoint
|
||
#
|
||
# Required
|
||
#
|
||
# endpoint = "127.0.0.1:4001"
|
||
|
||
# Enable watch Etcd changes
|
||
#
|
||
# Optional
|
||
#
|
||
# watch = true
|
||
|
||
# Prefix used for KV store.
|
||
#
|
||
# Optional
|
||
#
|
||
# prefix = "/traefik"
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "etcd.tmpl"
|
||
```
|
||
|
||
## <a id="zk"></a> Zookeeper backend
|
||
|
||
Træfɪk can be configured to use Zookeeper as a backend configuration:
|
||
|
||
```toml
|
||
################################################################
|
||
# Zookeeper configuration backend
|
||
################################################################
|
||
|
||
# Enable Zookeeperconfiguration backend
|
||
#
|
||
# Optional
|
||
#
|
||
# [zookeeper]
|
||
|
||
# Zookeeper server endpoint
|
||
#
|
||
# Required
|
||
#
|
||
# endpoint = "127.0.0.1:2181"
|
||
|
||
# Enable watch Zookeeper changes
|
||
#
|
||
# Optional
|
||
#
|
||
# watch = true
|
||
|
||
# Prefix used for KV store.
|
||
#
|
||
# Optional
|
||
#
|
||
# prefix = "/traefik"
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "zookeeper.tmpl"
|
||
```
|
||
|
||
## <a id="boltdb"></a> BoltDB backend
|
||
|
||
Træfɪk can be configured to use BoltDB as a backend configuration:
|
||
|
||
```toml
|
||
################################################################
|
||
# BoltDB configuration backend
|
||
################################################################
|
||
|
||
# Enable BoltDB configuration backend
|
||
#
|
||
# Optional
|
||
#
|
||
# [boltdb]
|
||
|
||
# BoltDB file
|
||
#
|
||
# Required
|
||
#
|
||
# endpoint = "/my.db"
|
||
|
||
# Enable watch BoltDB changes
|
||
#
|
||
# Optional
|
||
#
|
||
# watch = true
|
||
|
||
# Prefix used for KV store.
|
||
#
|
||
# Optional
|
||
#
|
||
# prefix = "/traefik"
|
||
|
||
# Override default configuration template. For advanced users :)
|
||
#
|
||
# Optional
|
||
#
|
||
# filename = "boltdb.tmpl"
|
||
```
|
||
|
||
|
||
## <a id="benchmarks"></a> Benchmarks
|
||
|
||
Here are some early Benchmarks between Nginx and Træfɪk acting as simple load balancers between two servers.
|
||
|
||
* Nginx:
|
||
|
||
```sh
|
||
$ docker run -d -e VIRTUAL_HOST=test1.localhost emilevauge/whoami
|
||
$ docker run -d -e VIRTUAL_HOST=test1.localhost emilevauge/whoami
|
||
$ docker run --log-driver=none -d -p 80:80 -v /var/run/docker.sock:/tmp/docker.sock:ro jwilder/nginx-proxy
|
||
$ ab -n 20000 -c 20 -r http://test1.localhost/
|
||
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
|
||
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
|
||
Licensed to The Apache Software Foundation, http://www.apache.org/
|
||
|
||
Benchmarking test1.localhost (be patient)
|
||
Completed 2000 requests
|
||
Completed 4000 requests
|
||
Completed 6000 requests
|
||
Completed 8000 requests
|
||
Completed 10000 requests
|
||
Completed 12000 requests
|
||
Completed 14000 requests
|
||
Completed 16000 requests
|
||
Completed 18000 requests
|
||
Completed 20000 requests
|
||
Finished 20000 requests
|
||
|
||
|
||
Server Software: nginx/1.9.2
|
||
Server Hostname: test1.localhost
|
||
Server Port: 80
|
||
|
||
Document Path: /
|
||
Document Length: 287 bytes
|
||
|
||
Concurrency Level: 20
|
||
Time taken for tests: 5.874 seconds
|
||
Complete requests: 20000
|
||
Failed requests: 0
|
||
Total transferred: 8900000 bytes
|
||
HTML transferred: 5740000 bytes
|
||
Requests per second: 3404.97 [#/sec] (mean)
|
||
Time per request: 5.874 [ms] (mean)
|
||
Time per request: 0.294 [ms] (mean, across all concurrent requests)
|
||
Transfer rate: 1479.70 [Kbytes/sec] received
|
||
|
||
Connection Times (ms)
|
||
min mean[+/-sd] median max
|
||
Connect: 0 0 0.1 0 2
|
||
Processing: 0 6 2.4 6 35
|
||
Waiting: 0 5 2.3 5 33
|
||
Total: 0 6 2.4 6 36
|
||
|
||
Percentage of the requests served within a certain time (ms)
|
||
50% 6
|
||
66% 6
|
||
75% 7
|
||
80% 7
|
||
90% 9
|
||
95% 10
|
||
98% 12
|
||
99% 13
|
||
100% 36 (longest request)
|
||
|
||
```
|
||
|
||
* Træfɪk:
|
||
|
||
```sh
|
||
$ docker run -d -l traefik.backend=test1 -l traefik.host=test1 emilevauge/whoami
|
||
$ docker run -d -l traefik.backend=test1 -l traefik.host=test1 emilevauge/whoami
|
||
docker run -d -p 8080:8080 -p 80:80 -v $PWD/traefik.toml:/traefik.toml -v /var/run/docker.sock:/var/run/docker.sock emilevauge/traefik
|
||
$ ab -n 20000 -c 20 -r http://test1.docker.localhost/
|
||
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
|
||
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
|
||
Licensed to The Apache Software Foundation, http://www.apache.org/
|
||
|
||
Benchmarking test1.docker.localhost (be patient)
|
||
Completed 2000 requests
|
||
Completed 4000 requests
|
||
Completed 6000 requests
|
||
Completed 8000 requests
|
||
Completed 10000 requests
|
||
Completed 12000 requests
|
||
Completed 14000 requests
|
||
Completed 16000 requests
|
||
Completed 18000 requests
|
||
Completed 20000 requests
|
||
Finished 20000 requests
|
||
|
||
|
||
Server Software: .
|
||
Server Hostname: test1.docker.localhost
|
||
Server Port: 80
|
||
|
||
Document Path: /
|
||
Document Length: 312 bytes
|
||
|
||
Concurrency Level: 20
|
||
Time taken for tests: 6.545 seconds
|
||
Complete requests: 20000
|
||
Failed requests: 0
|
||
Total transferred: 8600000 bytes
|
||
HTML transferred: 6240000 bytes
|
||
Requests per second: 3055.60 [#/sec] (mean)
|
||
Time per request: 6.545 [ms] (mean)
|
||
Time per request: 0.327 [ms] (mean, across all concurrent requests)
|
||
Transfer rate: 1283.11 [Kbytes/sec] received
|
||
|
||
Connection Times (ms)
|
||
min mean[+/-sd] median max
|
||
Connect: 0 0 0.2 0 7
|
||
Processing: 1 6 2.2 6 22
|
||
Waiting: 1 6 2.1 6 21
|
||
Total: 1 7 2.2 6 22
|
||
|
||
Percentage of the requests served within a certain time (ms)
|
||
50% 6
|
||
66% 7
|
||
75% 8
|
||
80% 8
|
||
90% 9
|
||
95% 10
|
||
98% 11
|
||
99% 13
|
||
100% 22 (longest request)
|
||
|
||
```
|