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override least recently used entries when certificate_data dictionary is full

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This commit is contained in:
Elvin Efendi 2019-06-26 18:40:55 -04:00
parent ecce3fd7b1
commit b66f9e329d
2 changed files with 17 additions and 15 deletions
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13
rootfs/etc/nginx/lua/configuration.lua
View file

@ -59,18 +59,15 @@ local function handle_servers()
local err_buf = {}
for _, server in ipairs(servers) do
if server.hostname and server.sslCert.pemCertKey then
local success
success, err = certificate_data:safe_set(server.hostname, server.sslCert.pemCertKey)
local success, err, forcible = certificate_data:set(server.hostname, server.sslCert.pemCertKey)
if not success then
if err == "no memory" then
ngx.status = ngx.HTTP_INTERNAL_SERVER_ERROR
ngx.log(ngx.ERR, "no memory in certificate_data dictionary")
return
end
local err_msg = string.format("error setting certificate for %s: %s\n", server.hostname, tostring(err))
table.insert(err_buf, err_msg)
end
if forcible then
local msg = string.format("certificate_data dictionary is full, LRU entry has been removed to store %s", server.hostname)
ngx.log(ngx.WARN, msg)
end
else
ngx.log(ngx.WARN, "hostname or pemCertKey are not present")
end

19
rootfs/etc/nginx/lua/test/configuration_test.lua
View file

@ -208,7 +208,7 @@ describe("Configuration", function()
it("should log an err and set status to Internal Server Error when a certificate cannot be set", function()
ngx.var.request_method = "POST"
ngx.shared.certificate_data.safe_set = function(self, data) return false, "error" end
ngx.shared.certificate_data.set = function(self, data) return false, "error", nil end
local mock_servers = cjson.encode({
{
hostname = "hostname",
@ -232,9 +232,14 @@ describe("Configuration", function()
assert.same(ngx.status, ngx.HTTP_INTERNAL_SERVER_ERROR)
end)
it("should log an err, set status to Internal Server Error, and short circuit when shared dictionary is full", function()
it("logs a warning when entry is forcibly stored", function()
local stored_entries = {}
ngx.var.request_method = "POST"
ngx.shared.certificate_data.safe_set = function(self, data) return false, "no memory" end
ngx.shared.certificate_data.set = function(self, key, value)
stored_entries[key] = value
return true, nil, true
end
local mock_servers = cjson.encode({
{
hostname = "hostname",
@ -252,11 +257,11 @@ describe("Configuration", function()
ngx.req.get_body_data = function() return mock_servers end
local s1 = spy.on(ngx, "log")
local s2 = spy.on(ngx.shared.certificate_data, "safe_set")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s1).was_called_with(ngx.ERR, "no memory in certificate_data dictionary")
assert.spy(s2).was_not_called_with("hostname2", "pemCertKey2")
assert.same(ngx.status, ngx.HTTP_INTERNAL_SERVER_ERROR)
assert.spy(s1).was_called_with(ngx.WARN, "certificate_data dictionary is full, LRU entry has been removed to store hostname")
assert.equal("pemCertKey", stored_entries["hostname"])
assert.equal("pemCertKey2", stored_entries["hostname2"])
assert.same(ngx.HTTP_CREATED, ngx.status)
end)
end)
end)