目標
使用在nginx中使用lua訪問redis數據庫。不需要安裝lua環境。
安裝依賴環境
yum -y install gcc zlib zlib-devel pcre-devel openssl openssl-devel
安裝LuaJIT
cd /usr/local/
mkdir LuaJIT
cd /usr/local/LuaJIT
wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
tar –xvf LuaJIT-2.0.5.tar.gz
cd LuaJIT-2.0.5
make install
安裝完成
如果安裝時提示找不到wget命令,可以執行yum install wget
這裡需要將lib庫加到配置中,否則後邊會出現找不到庫的錯誤:
# cat /etc/ld.so.confinclude ld.so.conf.d/*.conf# echo "/usr/local/lib" >> /etc/ld.so.conf# ldconfig
安裝nginx
cd /usr/local/
mkdir nginx
下載ngx_devel_kit
wget https://github.com/simpl/ngx_devel_kit/archive/v0.3.0.tar.gz
下載lua-nginx-module
wget https://github.com/openresty/lua-nginx-module/archive/v0.10.14rc1.tar.gz
下載nginx
wget http://nginx.org/download/nginx-1.15.5.tar.gz
解壓文件
tar -xvf v0.3.0.tar.gz
tar -xvf v0.10.14rc1.tar.gz
tar -xvf nginx-1.15.5.tar.gz
編譯nginx
cd nginx-1.12.1
./configure --prefix=/usr/local/nginx --add-module=../ngx_devel_kit-0.3.0 --add-module=../lua-nginx-module-0.10.14rc1
安裝
make
make install
或者合併兩個命令(4表示並行運行任務的數量)
make -j 4 && make install
啟動nginx
cd /usr/local/nginx/sbin
./nginx
提示找不到luajit的庫,需要配置一下
再次啟動nginx,啟動成功
測試lua配置
修改nginx配置文件nginx.conf:
添加紅色區域的內容:
location /lua {
default_type text/plain;
content_by_lua 'ngx.say("Hello, Lua!") ';
}
重新加載配置文件:./nginx -s reload
訪問http://ip/lua
說明基本配置成功了。nginx+lua搞定
redis安裝
cd /usr/local
mkdir redis
下載
wget http://download.redis.io/releases/ redis-2.8.17.tar.gz
解壓
tar -xvf redis-2.8.17.tar.gz
進入解壓後的文件夾
cd redis-2.8.17
安裝
make
啟動redis(&表示後臺運行)
cd src
./redis-server &
啟動成功後按ctrl+c退出啟動界面
測試
./redis-cli
set foo liq ---OK
get foo ---liq
關閉redis
SHUTDOWN
安裝lua-resty-redis
從https://github.com/openresty/lua-resty-redis.git下載lua-resty-redis-master後解壓
將lib包安裝到lua庫
解壓:
安裝
說明庫已經安裝到/usr/local/lib/lua目錄下了
安裝完成之後在/usr/local/lib/lua/resty裡面會有redis.lua
測試nginx+lua+redis
修改nginx的配置文件nginx.conf
在http中添加以上內容
添加以下兩個location,用來測試對redis的訪問:
#測試lua set數據到redis
location /lua/set {
default_type text/plain;
content_by_lua_file conf/lua/setKeyValue.lua;
}
#測試lua get數據從redis
location /lua/get {
default_type text/plain;
content_by_lua_file conf/lua/getKey.lua;
}
然後在nginx的conf目錄下創建lua目錄,lua目錄下創建兩個文件setKeyValue.lua和getKey.lua
分別編輯setKeyValue.lua文件和getKey.lua文件:
setKeyValue.lua:
--receive request params
local request_method = ngx.var.request_method
local args = nil
local key = nil
local value = nil
--獲取參數的值
if "GET" == request_method then
args = ngx.req.get_uri_args()
elseif "POST" == request_method then
ngx.req.read_body()
args = ngx.req.get_post_args()
end
key = args["key"]
value = args["value"]
--connect redis
local redis = require "resty.redis"
local cache = redis.new()
local ok, err = cache.connect(cache, '127.0.0.1', '6379')
cache:set_timeout(60000)
if not ok then
ngx.say("failed to connect:", err)
return
end
-- 請注意這裡 auth 的調用過程
-- check password
local count
count, err = cache:get_reused_times()
if 0 == count then
ok, err = cache:auth("mide123")
if not ok then
ngx.say("failed to auth: ", err)
return
end
elseif err then
ngx.say("failed to get reused times: ", err)
return
end
local res, err = cache:set(key, value)
if not res then
ngx.say("failed to set "..key..": ", err)
return
end
if res == ngx.null then
ngx.say(key.." not found.")
return
end
ngx.say("set redis value >>> "..key..": ", res)
local ok, err = cache:close()
if not ok then
ngx.say("failed to close:", err)
return
end
getKey.lua:
--receive request params
local request_method = ngx.var.request_method
local args = nil
local key = nil
local value = nil
--獲取參數的值
if "GET" == request_method then
args = ngx.req.get_uri_args()
elseif "POST" == request_method then
ngx.req.read_body()
args = ngx.req.get_post_args()
end
key = args["key"]
--connect redis
local redis = require "resty.redis"
local cache = redis.new()
local ok, err = cache.connect(cache, '127.0.0.1', '6379')
cache:set_timeout(60000)
if not ok then
ngx.say("failed to connect:", err)
return
end
-- 請注意這裡 auth 的調用過程
-- check password
local count
count, err = cache:get_reused_times()
if 0 == count then
ok, err = cache:auth("mide123")
if not ok then
ngx.say("failed to auth: ", err)
return
end
elseif err then
ngx.say("failed to get reused times: ", err)
return
end
local res, err = cache:get(key)
if not res then
ngx.say("failed to get "..key..": ", err)
return
end
if res == ngx.null then
ngx.say(key.." not found.")
return
end
ngx.say("get from redis >>> "..key..": ", res)
local ok, err = cache:close()
if not ok then
ngx.say("failed to close:", err)
return
end
重啟nginx
訪問/lua/set,需要加參數:
打開redis客戶端查看結果或者使用redis命令
測試/get/key訪問,需加參數:
至此,nginx+lua+redis配置成功,測試成功。可以使用lua腳本實現強大的功能了。
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