The task is to have an Oracle report generated daily, automatically, and e-mailed to a user.
So I've sort of got this working (it works if I hardcode one of the reports server names below).
I created a job on the database that will generate the report. I'm able to get the report to email as a PDF to the destination with this command:
UTL_HTTP.REQUEST('http://server/reports/rwservlet?server=specific_report_server &report='||p_report_name||'&userid='||p_connstring||'&destype=mail'||p_parameters||'&desname='||p_to_recipientlist||' &cc='||p_cc_recipientlist||'&bcc='||p_bcc_recipientlist||'&subject=%22' || REPLACE(p_subject,' ','%20') || '%22¶mform=no&DESformat=pdf&ENVID='||p_envid);
That works great...
The problem however is that my organization has two report servers that are load balanced. Our server team could take down one of the servers without really any warning, so I can't just hardcode the report server name (the ?server= parameter above) with one of the report server names because it will work for a while, then when that server goes down, it will stop working.
My server team asked me to look for a way to pull the server from the formsweb.cfg file or from default.env value within the job (there are parameters in there that hold the server name). The idea there is that the "http://server" piece will direct the report to be run on the appropriate server, and the first part of the job could get the reports server name from the config file that the report is run on. I'm not sure if this is possible from the database level, or how to do this. Any ideas?
Is there a better way that this can be done, perhaps?
If there are two load-balanced servers, that strongly implies that the network folks must have configured some sort of virtual IP (VIP) for the service. You (and everyone else) should be using that VIP rather than a specific server name.
For example, if you have two servers reportA.yourdomain.com and reportB.yourdomain.com, you would almost certainly create a VIP for reports.yourdomain.com that load balances between the two servers (and knows whether one of the servers is down or whether a new reportC server has been added). This VIP would either do the load balancing itself or would point to an actual physical load balancer that distributes the traffic. All applications would reference the reports.yourdomain.com VIP rather than any hard-coded server names.
Related
We have a number of (developer) existDb database servers, and some staging/production servers.
Each have their own configuration, that are slightly different.
We need to select which configuration to load and use in queries.
The configuration is to be stored in an XML file within the repository.
However, when syncing the content of the servers, a single burnt-in XML file is not sufficient, since it is overwritten during copying from the other server.
For this, we need the physical name of the actual database server.
The only function found, request:get-server-name that is not quite stable since a single eXist server can be accessed through a number of various (localhost, intranet or external) URLs. However, that leads to unnecessary duplication of the configuration, one for each external URL...
(Accessing some local files in the file system is not secure and not fast.)
How to get the physical name of the existDb server from XQuery?
I m sorry but I don't fully understand your question, are you talking about exist's default conf.xml or your own configuration file that you need to store in a VCS repo? Should the xquery be executed on one instance and trigger an event in all others, or just some, or...? Without some code it is difficult to see why and when something gets overwritten.
you could try console:jmx-token which does not vary depending on URL (at least it shouldn't)
Also you might find it much easier to use a docker based approach. Either with multiple instances coordinated via docker-compose or to keep the individual configs from not interfering with each other when moving from dev to staging to production https://github.com/duncdrum/exist-docker
If I understand correctly, you basically want to be able to get the hostname or the IP address of a server from XQuery. If the functions in the XQuery Request module are not doing as you wish, then another option would be to set a Java System Property when starting eXist-db. This system property could be the internal DNS name or IP of your server, for example: -Dour-server-name=server1.mydomain.com
From XQuery you could then read that Java System property using util:system-property("our-server-name").
I am using JMeter to test performance of the following Server Infrastructure. The Code Base uses ICEfaces framework and hence generates dynamic ID's each time there is a new build.
I record the scripts and run them for different variants of load (10 Users, 20 Users, 30 Users and so on). Whenever a new code base is deployed, because of change in ID's, I have to re-record the scripts before I perform Test runs again.
As of now I am able to satisfactorily get my job done.
I wish to take my job to a whole new level by trying to test performance on the following Server Infrastructure.
The following are my issues -
Because of two different nodes (Node1 and Node2) each node has a unique set of dynamic ID's associated with it and when I record a script on a particular login session, I cannot be sure of the Node my session is pinned on and as a result the recorded script is tailor made for a single node and not a cluster.
When "Load Balancer" gets in action, I cannot be sure of the Node JMeter hits during performance run and for obvious reasons the run fails to generate results.
I want a cleaver way to record script which can successfully run on a multiple server configuration.
How to perform performance Testing on this configuration?
I need to install multiple iDempiere instances in one server. The customized packages are different in build and the db they are using. Is there any way to deploy both of it in one server and access like localhost:8080/client1, localhost:8080/client2 . Any help appreciated.
When I want to reference several application servers I need to copy the path of various installations
and change the database name and port of each application :
/opt/idempiere-server-production/ (on port 8080 for example) for production
And
/opt/idempiere-server-test/ (on port 8081 for example) for test
the way you said is not possible, because the idempiere server for webapp is known as
http://hostname:port/webui
Running multiple instances of idempiere on a single server is not too difficult.
Here is what you need to take care of:
Install the instances into different directories. The instances do not need to share any common files. So you are just fine making a full installation for each instance.
Make sure each instance uses its own data base. Use different names for the instance data bases.
Make sure the idempiere server instances use different tcp ports.
If you really should need to use a single port to access all of the instances you could use a http server like apache or ngnix to do define virtual hosts. Proxying or use of rewrite rules will then allow you to do the desired redirections. (I am using subdomains and apache mod_proxy to do the job)
There is another benefit to using subdomains for browser access: If all your server instances use the same host name the client browser will sometimes not be able to keep cookies from different instances apart, which can lead to a blocked session as discussed here in the idempiere google group.
Use different DB user names. The docs advise not to change the default user name Adempiere and this is ok for a single instance installation. Still if you use a single DB user for all of your instances you will run into trouble once you need to restore a database from a backup file. The RUN_DBRestore.sh will delete and recreate the DB user which is not possible when the user owns more than one DB.
You can run all of your instances as services in parallel. Before the installation of another instance rename the service script: sudo mv /etc/init.d/idempiere /etc/init.d/idempiere-theInstance. Of course you will need to do some book keeping work wth the service controller of your OS to ensure that the renamed services are started as desired.
The service controller talks to the iDempiere server via the OSGI console. For this to work without problems in a multi instance environment you need to assign a different telnet port number to each of the instances: in the editor of your choice open the file /etc/init.d/iDempiere. Find the line export TELNET_PORT=12612 and change the port number to something else.
Please Note:
OS specific descriptions in this guide are for Ubuntu 16/18 or Debian, if on another OS you need to do some research.
I have been using the described approach to host idempiere versions 5 and 6 for some time now and did not have any problems so far. Still make sure you do your own thorough tests if you want to go that route.
If you run into any problems (and maybe even manage to solve them) please report back to the community. (by giving your own answer to this question or by posting to the idempiere google group) Thanks!
You can have as many setups on your server as you like. When you run the setup to create your properties, simply chose other web ports for each installation. You also may need to slightly change the webservers configuration if they have some default ports.
My setup is something like this.
I have multiple servers. Each server has multiple instances of same service (multi-tenant like architecture). Now I want to get status of all services running on all servers using SNMP.
The problem I am facing is, how can someone show table like information in Nagios?
i.e. when I click on any particular server, it will show me list of services. Now when I click on any service, it should again give me the list of instances of that particular service.
There's no such a feature in Nagios. You will need to set up a check for each of the services running on the monitored host.
I always forget to check what's going on in IIS on our webservers, and am wondering: is there some stupid applet or something that always runs locally that I can click on to check event logs and IIS logs on a remote machine?
Mark
You can set up samurize to follow the output of the logging on the local and remote machines but it requires some setup.
You can use a remote shell utility such as OpenSSH to connect to remote machines securely.
One at a time. Compmgmt.msc -> connect to another computer.
But one at a time is boring. Monitoring dozens of machines? I've been using logparser from MS for my log monitoring needs. I run a query that dumps errors and warnings to a csv file a few times a day.
So far, I've only used it to aggregate event logs across the dozen servers in our QA environment, but it appears to take many forms on log input, including IIS. A pseudo log file query (don't have samples with me)
logparser "Select [eventtype], [message] into output.csv FROM \\server1\system, \\server2\system" -i EVT
This shows: You can aggregate multiple servers. You tell it the input format - it supports a dozen log types. You can dump it into a csv file. It looks sort of like SQL. This article in security focus has an IIS log sample.
I'm not an applet type of guy, so I haven't though much about desktop widgets to do this.