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Separate the ExternalName backend from other backends in the process of synchronizing the backend, because the synchronization of the ExternalName backend requires dns resolution, so we should ensure that it does not affect the synchronization of the Non-ExternalName backend. After separation, in the init worker stage, we should immediately synchronize the Non-ExternalName backend, otherwise there will be some requests that fail with 503 because the balancer cannot be obtained in the rewrite stage.

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This commit is contained in:
qianyong 2020-12-10 10:51:47 +08:00
parent 5bd066463e
commit 8085304cb9
2 changed files with 66 additions and 16 deletions
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44
rootfs/etc/nginx/lua/test/balancer_test.lua
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@ -1,3 +1,5 @@
local cjson = require("cjson.safe")
local util = require("util")
local balancer, expected_implementations, backends
local original_ngx = ngx
@ -339,7 +341,9 @@ describe("Balancer", function()
local mock_instance = { sync = function(backend) end }
setmetatable(mock_instance, implementation)
implementation.new = function(self, backend) return mock_instance end
local s = spy.on(implementation, "new")
assert.has_no.errors(function() balancer.sync_backend(backend) end)
assert.spy(s).was_called_with(implementation, expected_backend)
stub(mock_instance, "sync")
assert.has_no.errors(function() balancer.sync_backend(backend) end)
assert.stub(mock_instance.sync).was_called_with(mock_instance, expected_backend)
@ -364,9 +368,11 @@ describe("Balancer", function()
local mock_instance = { sync = function(backend) end }
setmetatable(mock_instance, implementation)
implementation.new = function(self, backend) return mock_instance end
assert.has_no.errors(function() balancer.sync_backend(backend) end)
local s = spy.on(implementation, "new")
assert.has_no.errors(function() balancer.sync_backend(util.deepcopy(backend)) end)
assert.spy(s).was_called_with(implementation, expected_backend)
stub(mock_instance, "sync")
assert.has_no.errors(function() balancer.sync_backend(backend) end)
assert.has_no.errors(function() balancer.sync_backend(util.deepcopy(backend)) end)
assert.stub(mock_instance.sync).was_called_with(mock_instance, expected_backend)
end)
@ -400,4 +406,38 @@ describe("Balancer", function()
assert.stub(mock_instance.sync).was_called_with(mock_instance, backend)
end)
end)
describe("sync_backends()", function()
after_each(function()
reset_ngx()
end)
it("sync backends", function()
backends = {
{
name = "access-router-production-web-80", port = "80", secure = false,
sslPassthrough = false,
endpoints = {
{ address = "10.184.7.40", port = "8080", maxFails = 0, failTimeout = 0 },
{ address = "10.184.97.100", port = "8080", maxFails = 0, failTimeout = 0 },
{ address = "10.184.98.239", port = "8080", maxFails = 0, failTimeout = 0 },
},
sessionAffinityConfig = { name = "", cookieSessionAffinity = { name = "" } },
trafficShapingPolicy = {
weight = 0,
header = "",
headerValue = "",
cookie = ""
},
}
}
mock_ngx({ var = { proxy_upstream_name = "access-router-production-web-80" }, ctx = { } })
ngx.shared.configuration_data:set("backends", cjson.encode(backends))
reset_balancer()
balancer.init_worker()
assert.not_equal(balancer.get_balancer(), nil)
end)
end)
end)