mirror of
https://github.com/caddyserver/caddy.git
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6e0849d4c2
* add CookieHashSelection for session affinity * add CookieHashSelection for session affinity * register module * reverse_proxy: Add and fix cookie lb_policy * reverse_proxy: Manage hmac.write error on cookie hash selection * reverse_proxy: fix some comments * reverse_proxy: variable `cookieValue` is inside the else block * reverse_proxy: Abstract duplicate nuanced logic of reservoir sampling into a function * reverse_proxy: Set a default secret is indeed useless * reverse_proxy: add configuration syntax for cookie lb_policy * reverse_proxy: doc typo and improvement Co-authored-by: utick <123liuqingdong@163.com>
372 lines
10 KiB
Go
372 lines
10 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package reverseproxy
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import (
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"net/http"
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"net/http/httptest"
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"testing"
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)
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func testPool() UpstreamPool {
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return UpstreamPool{
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{Host: new(upstreamHost)},
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{Host: new(upstreamHost)},
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{Host: new(upstreamHost)},
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}
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}
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func TestRoundRobinPolicy(t *testing.T) {
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pool := testPool()
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rrPolicy := new(RoundRobinSelection)
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req, _ := http.NewRequest("GET", "/", nil)
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h := rrPolicy.Select(pool, req, nil)
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// First selected host is 1, because counter starts at 0
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// and increments before host is selected
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if h != pool[1] {
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t.Error("Expected first round robin host to be second host in the pool.")
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}
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h = rrPolicy.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected second round robin host to be third host in the pool.")
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}
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h = rrPolicy.Select(pool, req, nil)
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if h != pool[0] {
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t.Error("Expected third round robin host to be first host in the pool.")
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}
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// mark host as down
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pool[1].SetHealthy(false)
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h = rrPolicy.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected to skip down host.")
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}
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// mark host as up
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pool[1].SetHealthy(true)
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h = rrPolicy.Select(pool, req, nil)
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if h == pool[2] {
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t.Error("Expected to balance evenly among healthy hosts")
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}
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// mark host as full
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pool[1].CountRequest(1)
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pool[1].MaxRequests = 1
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h = rrPolicy.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected to skip full host.")
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}
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}
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func TestLeastConnPolicy(t *testing.T) {
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pool := testPool()
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lcPolicy := new(LeastConnSelection)
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req, _ := http.NewRequest("GET", "/", nil)
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pool[0].CountRequest(10)
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pool[1].CountRequest(10)
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h := lcPolicy.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected least connection host to be third host.")
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}
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pool[2].CountRequest(100)
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h = lcPolicy.Select(pool, req, nil)
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if h != pool[0] && h != pool[1] {
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t.Error("Expected least connection host to be first or second host.")
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}
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}
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func TestIPHashPolicy(t *testing.T) {
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pool := testPool()
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ipHash := new(IPHashSelection)
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req, _ := http.NewRequest("GET", "/", nil)
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// We should be able to predict where every request is routed.
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req.RemoteAddr = "172.0.0.1:80"
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h := ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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req.RemoteAddr = "172.0.0.2:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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req.RemoteAddr = "172.0.0.3:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected ip hash policy host to be the third host.")
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}
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req.RemoteAddr = "172.0.0.4:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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// we should get the same results without a port
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req.RemoteAddr = "172.0.0.1"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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req.RemoteAddr = "172.0.0.2"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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req.RemoteAddr = "172.0.0.3"
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h = ipHash.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected ip hash policy host to be the third host.")
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}
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req.RemoteAddr = "172.0.0.4"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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// we should get a healthy host if the original host is unhealthy and a
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// healthy host is available
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req.RemoteAddr = "172.0.0.1"
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pool[1].SetHealthy(false)
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h = ipHash.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected ip hash policy host to be the third host.")
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}
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req.RemoteAddr = "172.0.0.2"
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h = ipHash.Select(pool, req, nil)
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if h != pool[2] {
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t.Error("Expected ip hash policy host to be the third host.")
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}
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pool[1].SetHealthy(true)
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req.RemoteAddr = "172.0.0.3"
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pool[2].SetHealthy(false)
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h = ipHash.Select(pool, req, nil)
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if h != pool[0] {
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t.Error("Expected ip hash policy host to be the first host.")
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}
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req.RemoteAddr = "172.0.0.4"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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// We should be able to resize the host pool and still be able to predict
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// where a req will be routed with the same IP's used above
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pool = UpstreamPool{
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{Host: new(upstreamHost)},
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{Host: new(upstreamHost)},
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}
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req.RemoteAddr = "172.0.0.1:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[0] {
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t.Error("Expected ip hash policy host to be the first host.")
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}
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req.RemoteAddr = "172.0.0.2:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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req.RemoteAddr = "172.0.0.3:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[0] {
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t.Error("Expected ip hash policy host to be the first host.")
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}
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req.RemoteAddr = "172.0.0.4:80"
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h = ipHash.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected ip hash policy host to be the second host.")
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}
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// We should get nil when there are no healthy hosts
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pool[0].SetHealthy(false)
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pool[1].SetHealthy(false)
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h = ipHash.Select(pool, req, nil)
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if h != nil {
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t.Error("Expected ip hash policy host to be nil.")
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}
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}
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func TestFirstPolicy(t *testing.T) {
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pool := testPool()
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firstPolicy := new(FirstSelection)
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req := httptest.NewRequest(http.MethodGet, "/", nil)
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h := firstPolicy.Select(pool, req, nil)
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if h != pool[0] {
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t.Error("Expected first policy host to be the first host.")
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}
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pool[0].SetHealthy(false)
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h = firstPolicy.Select(pool, req, nil)
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if h != pool[1] {
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t.Error("Expected first policy host to be the second host.")
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}
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}
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func TestURIHashPolicy(t *testing.T) {
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pool := testPool()
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uriPolicy := new(URIHashSelection)
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request := httptest.NewRequest(http.MethodGet, "/test", nil)
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h := uriPolicy.Select(pool, request, nil)
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if h != pool[0] {
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t.Error("Expected uri policy host to be the first host.")
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}
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pool[0].SetHealthy(false)
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h = uriPolicy.Select(pool, request, nil)
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if h != pool[1] {
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t.Error("Expected uri policy host to be the first host.")
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}
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request = httptest.NewRequest(http.MethodGet, "/test_2", nil)
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h = uriPolicy.Select(pool, request, nil)
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if h != pool[1] {
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t.Error("Expected uri policy host to be the second host.")
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}
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// We should be able to resize the host pool and still be able to predict
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// where a request will be routed with the same URI's used above
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pool = UpstreamPool{
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{Host: new(upstreamHost)},
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{Host: new(upstreamHost)},
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}
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request = httptest.NewRequest(http.MethodGet, "/test", nil)
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h = uriPolicy.Select(pool, request, nil)
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if h != pool[0] {
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t.Error("Expected uri policy host to be the first host.")
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}
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pool[0].SetHealthy(false)
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h = uriPolicy.Select(pool, request, nil)
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if h != pool[1] {
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t.Error("Expected uri policy host to be the first host.")
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}
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request = httptest.NewRequest(http.MethodGet, "/test_2", nil)
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h = uriPolicy.Select(pool, request, nil)
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if h != pool[1] {
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t.Error("Expected uri policy host to be the second host.")
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}
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pool[0].SetHealthy(false)
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pool[1].SetHealthy(false)
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h = uriPolicy.Select(pool, request, nil)
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if h != nil {
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t.Error("Expected uri policy policy host to be nil.")
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}
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}
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func TestLeastRequests(t *testing.T) {
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pool := testPool()
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pool[0].Dial = "localhost:8080"
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pool[1].Dial = "localhost:8081"
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pool[2].Dial = "localhost:8082"
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pool[0].SetHealthy(true)
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pool[1].SetHealthy(true)
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pool[2].SetHealthy(true)
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pool[0].CountRequest(10)
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pool[1].CountRequest(20)
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pool[2].CountRequest(30)
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result := leastRequests(pool)
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if result == nil {
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t.Error("Least request should not return nil")
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}
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if result != pool[0] {
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t.Error("Least request should return pool[0]")
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}
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}
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func TestRandomChoicePolicy(t *testing.T) {
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pool := testPool()
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pool[0].Dial = "localhost:8080"
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pool[1].Dial = "localhost:8081"
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pool[2].Dial = "localhost:8082"
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pool[0].SetHealthy(false)
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pool[1].SetHealthy(true)
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pool[2].SetHealthy(true)
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pool[0].CountRequest(10)
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pool[1].CountRequest(20)
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pool[2].CountRequest(30)
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request := httptest.NewRequest(http.MethodGet, "/test", nil)
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randomChoicePolicy := new(RandomChoiceSelection)
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randomChoicePolicy.Choose = 2
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h := randomChoicePolicy.Select(pool, request, nil)
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if h == nil {
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t.Error("RandomChoicePolicy should not return nil")
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}
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if h == pool[0] {
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t.Error("RandomChoicePolicy should not choose pool[0]")
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}
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}
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func TestCookieHashPolicy(t *testing.T) {
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pool := testPool()
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pool[0].Dial = "localhost:8080"
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pool[1].Dial = "localhost:8081"
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pool[2].Dial = "localhost:8082"
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pool[0].SetHealthy(true)
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pool[1].SetHealthy(false)
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pool[2].SetHealthy(false)
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request := httptest.NewRequest(http.MethodGet, "/test", nil)
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w := httptest.NewRecorder()
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cookieHashPolicy := new(CookieHashSelection)
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h := cookieHashPolicy.Select(pool, request, w)
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cookie_server1 := w.Result().Cookies()[0]
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if cookie_server1 == nil {
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t.Error("cookieHashPolicy should set a cookie")
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}
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if cookie_server1.Name != "lb" {
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t.Error("cookieHashPolicy should set a cookie with name lb")
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}
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if h != pool[0] {
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t.Error("Expected cookieHashPolicy host to be the first only available host.")
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}
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pool[1].SetHealthy(true)
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pool[2].SetHealthy(true)
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request = httptest.NewRequest(http.MethodGet, "/test", nil)
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w = httptest.NewRecorder()
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request.AddCookie(cookie_server1)
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h = cookieHashPolicy.Select(pool, request, w)
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if h != pool[0] {
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t.Error("Expected cookieHashPolicy host to stick to the first host (matching cookie).")
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}
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s := w.Result().Cookies()
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if len(s) != 0 {
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t.Error("Expected cookieHashPolicy to not set a new cookie.")
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}
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pool[0].SetHealthy(false)
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request = httptest.NewRequest(http.MethodGet, "/test", nil)
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w = httptest.NewRecorder()
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request.AddCookie(cookie_server1)
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h = cookieHashPolicy.Select(pool, request, w)
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if h == pool[0] {
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t.Error("Expected cookieHashPolicy to select a new host.")
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}
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if w.Result().Cookies() == nil {
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t.Error("Expected cookieHashPolicy to set a new cookie.")
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}
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}
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