diff options
| author |   HuabingZhao <zhaohuabing@zte.com.cn> | 2016-08-13 14:10:39 +0800 |
|---|---|---|
| committer |   HuabingZhao <zhao.huabing@zte.com.cn> | 2016-08-13 14:56:36 +0800 |
| commit | 1ae0c8d11018ac804be96062c34fcf0d9015ef35 (patch) | |
| tree | f36880d9f409807c30d2927070c8b5dc4168843b /openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance | |
| parent | 29c0018a50104f18b34277cc01720c0b3e401212 (diff) | |
Initial code import
Change-Id: I839b84e5600aedece6c33deb16bec1bf9dbb61df
Signed-off-by: HuabingZhao <zhao.huabing@zte.com.cn>
Diffstat (limited to 'openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance')
2 files changed, 100 insertions, 0 deletions
diff --git a/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/balancer.lua b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/balancer.lua new file mode 100644 index 0000000..ffd9f0a --- /dev/null +++ b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/balancer.lua @@ -0,0 +1,40 @@ +--[[
+
+ Copyright (C) 2016 ZTE, Inc. and others. All rights reserved. (ZTE)
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+--]]
+
+local b = require "ngx.balancer"
+local policymodule = require "loadbalance.policy.roundrobin"
+local log_util = require('lib.utils.log_util')
+
+local ngx_ctx = ngx.ctx
+local log = log_util.log
+
+local doservernil = function()
+ ngx.status = ngx.HTTP_NOT_FOUND
+ ngx.say("no on-line server found!")
+ return ngx.exit(ngx.status)
+end
+
+local servers = ngx_ctx.backservers
+local svckeypattern = ngx_ctx.svcserverpattern
+local server,err = policymodule.get_backserver(servers,svckeypattern)
+if not server then
+ doservernil()
+end
+--b.set_current_peer(server["ip"]..":"..server["port"])
+b.set_current_peer(server["ip"],server["port"])
+log("upstreamserver",server["ip"]..":"..server["port"])
\ No newline at end of file diff --git a/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/policy/roundrobin.lua b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/policy/roundrobin.lua new file mode 100644 index 0000000..986d04e --- /dev/null +++ b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/loadbalance/policy/roundrobin.lua @@ -0,0 +1,60 @@ +--[[
+
+ Copyright (C) 2016 ZTE, Inc. and others. All rights reserved. (ZTE)
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+--]]
+
+local _M = {}
+_M._VERSION = '1.0.0'
+
+local tbl_util = require('lib.utils.table_util')
+local tbl_isempty = tbl_util.isempty
+
+function _M.get_backserver(servers,svckey)
+ if tbl_isempty(servers) then return nil,"input server list is empty" end
+
+ local length = #servers
+ if length==1 then
+ -- return it directly if there is only one server
+ return servers[1],nil
+ end
+
+ local resty_lock = require "resty.lock"
+ local roundrobin_cache = ngx.shared.rr_cache
+
+ --step1:acquire lock
+ local opts = {["timeout"] = 0.002,["exptime"] = 0.05}--this can be set using the conf file
+ local rrlock = resty_lock:new("rr_locks",opts)
+ local elapsed, err = rrlock:lock(svckey)
+ if not elapsed then
+ --return fail("failed to acquire the lock: ", err)
+ end
+ --step2:lock successfully acquired!incr the index
+ local index, err = roundrobin_cache:get(svckey)
+ if not index then
+ index = 0
+ end
+ index = index%length+1
+
+ --step3:update the shm cache with the new index
+ roundrobin_cache:set(svckey,index)
+
+ --step4:release the lock
+ local ok, err = rrlock:unlock()
+
+ return servers[index],nil
+end
+
+return _M
\ No newline at end of file |