Multiple Proxy Manager

Jul 06, 2017 Tag – when you have several proxies added in the Proxy Manager tab, sorting them out could be a pain, hence adding a tag to the proxy would do the trick Verify All Proxies – click on this button when you have several proxies that need verifying, especially when you’ve imported proxies. Load balancer scheduler algorithm. At present, there are 4 load balancer scheduler algorithms available for use: Request Counting (modlbmethodbyrequests), Weighted Traffic Counting (modlbmethodbytraffic), Pending Request Counting (modlbmethodbybusyness) and Heartbeat Traffic Counting (modlbmethodheartbeat).

1. Proxy Manager Outlook
2. Multiple Proxy Manager Login
3. Multiple Proxy Manager Training

Proxy Support How-To

Table of Contents

Introduction

Using standard configurations of Tomcat, web applications can ask forthe server name and port number to which the request was directed forprocessing. When Tomcat is running standalone with theHTTP/1.1 Connector, it will generallyreport the server name specified in the request, and the port number onwhich the Connector is listening. The servlet APIcalls of interest, for this purpose, are:

• ServletRequest.getServerName(): Returns the host name of the server to which the request was sent.
• ServletRequest.getServerPort(): Returns the port number of the server to which the request was sent.
• ServletRequest.getLocalName(): Returns the host name of the Internet Protocol (IP) interface on which the request was received.
• ServletRequest.getLocalPort(): Returns the Internet Protocol (IP) port number of the interface on which the request was received.

When you are running behind a proxy server (or a web server that isconfigured to behave like a proxy server), you will sometimes prefer tomanage the values returned by these calls. In particular, you willgenerally want the port number to reflect that specified in the originalrequest, not the one on which the Connector itself islistening. You can use the proxyName and proxyPortattributes on the <Connector> element to configurethese values.

Proxy support can take many forms. The following sections describeproxy configurations for several common cases.

Apache httpd Proxy Support

Apache httpd 1.3 and later versions support an optional module(mod_proxy) that configures the web server to act as a proxyserver. This can be used to forward requests for a particular web applicationto a Tomcat instance, without having to configure a web connector such asmod_jk. To accomplish this, you need to perform the followingtasks:

1. Configure your copy of Apache so that it includes the mod_proxy module. If you are building from source, the easiest way to do this is to include the --enable-module=proxy directive on the ./configure command line.

2. If not already added for you, make sure that you are loading the mod_proxy module at Apache startup time, by using the following directives in your httpd.conf file:

3. Include two directives in your httpd.conf Dj splash songs download. file for each web application that you wish to forward to Tomcat. For example, to forward an application at context path /myapp:

   which tells Apache to forward URLs of the form http://localhost/myapp/* to the Tomcat connector listening on port 8081.

4. Configure your copy of Tomcat to include a special <Connector> element, with appropriate proxy settings, for example:

   which will cause servlets inside this web application to think that all proxied requests were directed to www.mycompany.com on port 80.

5. It is legal to omit the proxyName attribute from the <Connector> element. If you do so, the value returned by request.getServerName() will by the host name on which Tomcat is running. In the example above, it would be localhost.

6. If you also have a <Connector> listening on port 8080 (nested within the same Service element), the requests to either port will share the same set of virtual hosts and web applications.

7. You might wish to use the IP filtering features of your operating system to restrict connections to port 8081 (in this example) to be allowed only from the server that is running Apache.

8. Alternatively, you can set up a series of web applications that are only available via proxying, as follows:

   • Configure another <Service> that contains only a <Connector> for the proxy port.
   • Configure appropriate Engine, Host, and Context elements for the virtual hosts and web applications accessible via proxying.
   • Optionally, protect port 8081 with IP filters as described earlier.

9. When requests are proxied by Apache, the web server will be recording these requests in its access log. Therefore, you will generally want to disable any access logging performed by Tomcat itself.

Proxy Manager Outlook

When requests are proxied in this manner, all marksecniebe1970.wikidot.com/blog:14. requestsfor the configured web applications will be processed by Tomcat (includingrequests for static content). You can improve performance by using themod_jk web connector instead of mod_proxy.mod_jk can be configured so that the web server serves staticcontent that is not processed by filters or security constraints definedwithin the web application's deployment descriptor(/WEB-INF/web.xml).

Details on load balancer stickyness

When using cookie based stickyness, you need to configure the name of the cookie that contains the information about which back-end to use. This is done via the stickysession attribute added to either ProxyPass or ProxySet. The name of the cookie is case-sensitive. The balancer extracts the value of the cookie and looks for a member worker with route equal to that value. The route must also be set in either ProxyPass or ProxySet. The cookie can either be set by the back-end, or as shown in the above example by the Apache web server itself.

Some back-ends use a slightly different form of stickyness cookie, for instance Apache Tomcat. Tomcat adds the name of the Tomcat instance to the end of its session id cookie, separated with a dot (. 3dsimed keygen. ) from the session id. Thus if the Apache web server finds a dot in the value of the stickyness cookie, it only uses the part behind the dot to search for the route. https://monsgastisia.tistory.com/7. In order to let Tomcat know about its instance name, you need to set the attribute jvmRoute inside the Tomcat configuration file conf/server.xml to the value of the route of the worker that connects to the respective Tomcat. The name of the session cookie used by Tomcat (and more generally by Java web applications based on servlets) is JSESSIONID (upper case) but can be configured to something else.

The second way of implementing stickyness is URL encoding. The web server searches for a query parameter in the URL of the request. The name of the parameter is specified again using stickysession. The value of the parameter is used to lookup a member worker with route equal to that value. Since it is not easy to extract and manipulate all URL links contained in responses, generally the work of adding the parameters to each link is done by the back-end generating the content. In some cases it might be feasible doing this via the web server using mod_substitute or mod_sed. This can have negative impact on performance though.

Multiple Proxy Manager Login

The Java standards implement URL encoding slightly different. They use a path info appended to the URL using a semicolon (;) as the separator and add the session id behind. As in the cookie case, Apache Tomcat can include the configured jvmRoute in this path info. To let Apache find this sort of path info, you need to set scolonpathdelim to On in ProxyPass or ProxySet.

Multiple Proxy Manager Training

Finally you can support cookies and URL encoding at the same time, by configuring the name of the cookie and the name of the URL parameter separated by a vertical bar (|) as in the following example:

If the cookie and the request parameter both provide routing information for the same request, the information from the request parameter is used.