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190 lines
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190 lines
6.3 KiB
Plaintext
/**
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@if INTERNAL
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@page remotesvc Remote Test Server Setup
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\tableofcontents
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<!-- Note that this file has the .dox extension, but is mostly markdown -->
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<!-- Begin MarkDown -->
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# Introduction {#remotesvc_intro}
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The test suite for the DAP2 and DAP4 (aka DAP) protocols optionally
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uses a continuously running test server to verify that the
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DAP protocols can successfully be used against a remote server such
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as a Unidata THREDDS Data Server or a OPeNDAP Hyrax server.
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The way that this is tests is to establish two servlets running
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under a Tomcat server on some machine with a known IP address
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or DNS name. For example, accessing this URL.
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````
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https://remotetest.unidata.ucar.edu/dts/
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````
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will bring up a page with a variety of DAP2 accessible files.
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These files are accessed by the netcdf-c test case
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_netcdf-c/ncdap_test/tst_remote3.sh_
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to verify that the whole
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transmission and conversions process worked correctly.
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Similarly, the DAP4 test case is
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_netcdf-c/ncdap_test/test_remote.sh_
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and it accesses the test server web page with this URL.
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````
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https://remotetest.unidata.ucar.edu/d4ts/
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````
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Setting up and Maintaining the test server involves a somewhat complex
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set of tasks. This document shows how to do those tasks.
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# Tomcat Setup {#remotesvc_tomcat}
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The initial task is to setup a Tomcat server on some machine.
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Currently the remote server is operating on Jetstream on an Ubuntu Linux
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environment.
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Assuming you do not already have Tomcat setup, the necessary steps are
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as follows.
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1. Login to your machine - let us call it "testserver.unidata.edu".
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2. Use the package manager to install two packages using commands like this.
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````
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sudo apt-get tomcat7
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sudo apt-get tomcat7-admin
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````
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Note that this installs Tomcat version 7. Later versions should also work.
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3. Goto the tomcat7 installation, probably ''/usr/share/tomcat7'',
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and modify the configuration as described in the next section.
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4. Startup tomcat using the following commands.
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````
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cd /usr/share/tomcat7/bin
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./startup.sh
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````
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It is possible that the startup command may need to be executed with ''sudo''.
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5. Verify that tomcat is running by trying this URL in your web browser.
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````
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http:testserver.unidata.edu:8080
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````
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The port -- 8080 -- is the default for an installed tomcat. It may be that
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you will need to change it as part of the configuration process.
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6. Try the administration web page
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````
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http:testserver.unidata.edu:8080/manager
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````
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This should pop-up a user+password dialog box. You should fill it in
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with the values you choose during configuration.
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The resulting final page will be the one you use to get the dts and d4ts
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servlets operating.
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7. Use the commands
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````
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cd /usr/share/tomcat7/bin
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./shutdown.sh
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````
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to stop the Tomcat server.
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# Configuring Tomcat {#remotesvc_cfg}
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In the primary Tomcat directory -- probably /usr/share/tomcat7 --
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there should be a ''conf'' directory, and in that directory,
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you will need to edit the file ''tomcat-users.xml''.
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## Configuring tomcat-users.xml {#remotesvc_tomcat_users}
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The goal here is primarily to setup a user that can login to the
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Tomcat admin page to upload the dts and d4ts servlets.
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Let us assume that the username we want to use is ''dapadmin''
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with password ''dap''.
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Edit the ''tomcat-users.xml'' file.
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You will probably have to use ''sudo'' to access the file.
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Insert the following near the end of the file.
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````
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<role rolename="manager-gui"/>
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<user username="dapadmin" password="dap" roles="admin,manager-gui"/>
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````
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## Configuring server.xml {#remotesvc_config_server_xml}
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As a rule, the default settings in ''server.xml'' will work
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and provide insecure access to the Tomcat server via port 8080.
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This is ok if the test server is running nothing but the d4ts and dts
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test servlets. Otherwise, you should investigate how to
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get the Tomcat server to use <em>https:</em>
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# Loading dts.war and d4ts.war {#remotesvc_load_war}
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The next step is to actually upload the servlet files for the DAP
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test servlets. We assume that you have on your local disk two files:
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''dts.war'' and ''d4ts.war''. Building those servlet war files is
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described in a separate section.
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The specific tasks are as follows:
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1. Open the web page
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````
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http:testserver.unidata.edu:8080/manager
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````
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Scroll down to the block labelled ''WAR file to deploy'',
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which should have two buttons: ''Browse'' and ''Deploy''.
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2. Clicking on the browse button should bring up a file dialog box.
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Use the dialog box to choose ''dts.war''.
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3. After choosing that file, click the ''Deploy'' button.
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After some delay, this should add
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a new entry in the first column near the top of the page.
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That entry should be named ''/dts''.
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4. If you click the ''/dts'' in the first column, then it should take you
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to the DAP2 test server main page.
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5. Repeat to load ''d4ts.war'' as ''/d4ts''.
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# Testing the Test Server {#remotesvc_testing}
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You can now test the test server by configuring and building
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the netcdf-c library. In order to force the use
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of the newly started test server you can either:
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1. Add the option
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````
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--with-testservers=testserver.unidata.edu
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````
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This will override the defaults.
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2. Edit configure.ac and find the string "svclist".
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Replace the list with "testserver.unidata.edu".
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This will make the new test server be the default.
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After building the library, go into the directory ''ncdap_test''
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and do a ''make check'' command. This should succeed.
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Similarly enter the directory ''dap4_test'' and do a make check
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to verify that the d4ts test server is working.
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# Building d4ts.war and dts.war {#remotesvc_buildservlets}
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In order to build the servlet (.war) files, you will need to
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clone the Thredds directory on github: https://github.com/Unidata/tds.
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Once you have a clone, you will need to enter the tds directory
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and build by invoking gradle using this command.
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````
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./gradlew --info --no-daemon clean assemble
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````
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If successful, the following two files should exist
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(the names may vary slightly).
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1. ./dap4/d4ts/build/libs/d4ts-5.0.0-SNAPSHOT.war
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2. ./opendap/dtswar/build/libs/dtswar-5.0.0-SNAPSHOT.war
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Copy the two files to some more accessible place and rename them
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to ''d4ts.war'' and ''dts.war'' respectively.
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Use those files to upload the servlets to your Tomcat server
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as described above.
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# Point of Contact {#remotesvc_poc}
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__Author__: Dennis Heimbigner<br>
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__Email__: dmh at ucar dot edu<br>
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__Initial Version__: 6/26/2018<br>
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__Last Revised__: 6/28/2018
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<!-- End MarkDown -->
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@endif
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*/
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