1、首先我们开启两个服务：
- tomcat8080，tomcat8081。
[root@iZwz97473w2ydu1pgsmzk4Z apache-tomcat-9.0.24]# clear
[root@iZwz97473w2ydu1pgsmzk4Z apache-tomcat-9.0.24]# pwd
/home/admin/software/apache-tomcat-9.0.24
[root@iZwz97473w2ydu1pgsmzk4Z apache-tomcat-9.0.24]# cd .
[root@iZwz97473w2ydu1pgsmzk4Z apache-tomcat-9.0.24]# cd ..
[root@iZwz97473w2ydu1pgsmzk4Z software]# cp apache-tomcat-9.0.24 tomcat8081 -R
- 在tomcat8081里面，我们修改conf目录下面的server.xml文件，注意
-
<?xml version="1.0" encoding="UTF-8"?> <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You 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. --> <!-- Note: A "Server" is not itself a "Container", so you may not define subcomponents such as "Valves" at this level. Documentation at /docs/config/server.html --> <Server port="8005" shutdown="SHUTDOWN"> <Listener className="org.apache.catalina.startup.VersionLoggerListener" /> <!-- Security listener. Documentation at /docs/config/listeners.html <Listener className="org.apache.catalina.security.SecurityListener" /> --> <!--APR library loader. Documentation at /docs/apr.html --> <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> <!-- Prevent memory leaks due to use of particular java/javax APIs--> <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /> <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" /> <!-- Global JNDI resources Documentation at /docs/jndi-resources-howto.html --> <GlobalNamingResources> <!-- Editable user database that can also be used by UserDatabaseRealm to authenticate users --> <Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /> </GlobalNamingResources> <!-- A "Service" is a collection of one or more "Connectors" that share a single "Container" Note: A "Service" is not itself a "Container", so you may not define subcomponents such as "Valves" at this level. Documentation at /docs/config/service.html --> <Service name="Catalina"> <!--The connectors can use a shared executor, you can define one or more named thread pools--> <!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" minSpareThreads="4"/> --> <!-- A "Connector" represents an endpoint by which requests are received and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) Connector: /docs/apr.html Define a non-SSL/TLS HTTP/1.1 Connector on port 8080 --> <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> <!-- A "Connector" using the shared thread pool--> <!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> --> <!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443 This connector uses the NIO implementation. The default SSLImplementation will depend on the presence of the APR/native library and the useOpenSSL attribute of the AprLifecycleListener. Either JSSE or OpenSSL style configuration may be used regardless of the SSLImplementation selected. JSSE style configuration is used below. --> <!-- <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol" maxThreads="150" SSLEnabled="true"> <SSLHostConfig> <Certificate certificateKeystoreFile="conf/localhost-rsa.jks" type="RSA" /> </SSLHostConfig> </Connector> --> <!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443 with HTTP/2 This connector uses the APR/native implementation which always uses OpenSSL for TLS. Either JSSE or OpenSSL style configuration may be used. OpenSSL style configuration is used below. --> <!-- <Connector port="8443" protocol="org.apache.coyote.http11.Http11AprProtocol" maxThreads="150" SSLEnabled="true" > <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" /> <SSLHostConfig> <Certificate certificateKeyFile="conf/localhost-rsa-key.pem" certificateFile="conf/localhost-rsa-cert.pem" certificateChainFile="conf/localhost-rsa-chain.pem" type="RSA" /> </SSLHostConfig> </Connector> --> <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> <!-- An Engine represents the entry point (within Catalina) that processes every request. The Engine implementation for Tomcat stand alone analyzes the HTTP headers included with the request, and passes them on to the appropriate Host (virtual host). Documentation at /docs/config/engine.html --> <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> --> <Engine name="Catalina" defaultHost="localhost"> <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html (simple how to) /docs/config/cluster.html (reference documentation) --> <!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> --> <!-- Use the LockOutRealm to prevent attempts to guess user passwords via a brute-force attack --> <Realm className="org.apache.catalina.realm.LockOutRealm"> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"> <!-- SingleSignOn valve, share authentication between web applications Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> --> <!-- Access log processes all example. Documentation at: /docs/config/valve.html Note: The pattern used is equivalent to using pattern="common" --> <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log" suffix=".txt" pattern="%h %l %u %t "%r" %s %b" /> </Host> </Engine> </Service> </Server>![]()
-
查看监听端口我们发现，8009,8005端口是处于监听状态的，为了防止端口占用问题，我们在tomcat8081文件里面修改server.xml文件不能只修改8080这一处。
-
修改之后启动发现，8080是无法启动的，也无法访问，查看错误日志，是因为8005端口无法开启
-
那么怎么开启呢？找到你的JDK安装目录，进入到jre里面：/usr/local/jdk1.8.0_221/jre/lib/security，进入之后修改java.security文件。
-
原：securerandom.source=file:/dev/random 修改：securerandom.source=file:/dev/urandom
-
![]()
之后就可以开启了，我们在ROOT目录下面各创建了一个time.jsp文件，稍有差别，可通过yourip:8080/time.jsp访问。
2、nginx配置文件
................
server 127.0.0.1:8080;
}
}
server {
listen 86;
#access_log /var/log/nginx/host.access.log main;
# proxy_set_header Host $proxy_host;
# proxy_set_header X-Forwarded-For $http_add_x_forwarded_for;
# root /usr/share/nginx/html;
content_by_lua_file /home/admin/web/lua/test.lua;
}
location /hello {
default_type 'text/plain';
content_by_lua 'ngx.say("Hello,Lua")';
}
location /myip {
default_type 'text/plain';
content_by_lua 'clientIP = ngx.req.get_headers()["remote_addr"]
ngx.say("ClientIP :",clientIP)
# ngx.exec("@server")
';
# ngx.exec('@server');
# return;
}
location @server {
proxy_pass http://server;
include proxy_params;
}
location @server_test {
proxy_pass http://server_test;
include proxy_params;
}
2、memcached安装：yum install memcached
简单的开启服务操作：memcached -u nobody -p11211 -d
(daemon)守护进程
简单的登录操作：telnet 127.0.0.1 11211 就可以。
3、Lua脚本编写：
#!/usr/bin/lua
clientIP = ngx.req.get_headers()["X-Real-IP"]
if clientIP == nil then
clientIP = ngx.req.get_headers()["X_Forwarded_For"]
end
if clientIP == nil then
clientIP = ngx.var.remote_addr
end
local memcached = require "resty.memcached"
local memc,err = memcached:new()
if not memc then
ngx.say("failed to instantiate memc",err)
return
end
local ok,err = memc:connect("127.0.0.1",11211)
if not ok then
ngx.say("failed to connect: ",err)
return
end
local res,flags,err = memc:get(clientIP)
ngx.say("value key : ",res,clientIP)
if err then
ngx.say("failed to get clientIP",err)
return
end
if res == "1" then
ngx.exec("@server_test")
return
end
ngx.exec("@server")
return
3、需要注意的是，我们在这儿要引入相关文件。（local memcached = require "resty.memcached"）
- wget https://github.com/agentzh/lua-resty-memcached/archive/v0.11.tar.gz
- tar -zxvf v0.11.tar.gz
- cp -r lua-resty-memcached-0.11/lib/resty /usr/local/share/lua/5.1/（具体是那个目录，根据自己情况确定）
4、我这儿有一个报错，是ngx.exec的，目前还没有解决，如果你知道，可以在下面评论：
换成ngx.say（）之后可以显示不同的信息。
官网：
ngx.exec
syntax: ngx.exec(uri, args?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
Does an internal redirect to uri with args and is similar to the echo_exec directive of the echo-nginx-module.
ngx.exec('/some-location');
ngx.exec('/some-location', 'a=3&b=5&c=6');
ngx.exec('/some-location?a=3&b=5', 'c=6');
The optional second args can be used to specify extra URI query arguments, for example:
ngx.exec("/foo", "a=3&b=hello%20world")
Alternatively, a Lua table can be passed for the args argument for ngx_lua to carry out URI escaping and string concatenation.
ngx.exec("/foo", { a = 3, b = "hello world" })
The result is exactly the same as the previous example.
The format for the Lua table passed as the args argument is identical to the format used in the ngx.encode_args method.
Named locations are also supported but the second args argument will be ignored if present and the querystring for the new target is inherited from the referring location (if any).
GET /foo/file.php?a=hello will return "hello" and not "goodbye" in the example below
location /foo {
2、灰度发布好文推荐：https://cloud.tencent.com/developer/article/1178722
3、lua-nginx-module模块里ngx_lua的所有指令以及可用ngx所有方法：http://www.04007.cn/article/430.html4、