On Mon, Aug 8, 2016 at 11:31 AM, Mark Eggers <its_toas...@yahoo.com.invalid> wrote:
> Sean, > > On 8/8/2016 7:10 AM, Sean Son wrote: > > On Fri, Aug 5, 2016 at 5:34 PM, Mark Eggers > <its_toas...@yahoo.com.invalid> > > wrote: > > > >> On 8/5/2016 2:19 PM, Sean Son wrote: > >>> Hello! > >>> > >>> I am currently running Tomcat 8 on RHEL 7.2 with one web application > >>> called AppVet (A mobile Application Vetting program). The > >>> application works well but when I tried to use a script to allow > >>> tomcat to start up at boot, the webapp gives an authentication error. > >>> I saw the following error in the logs for appvet: > >>> > >>> > >>> [ERROR] Could not connect to database: > >>> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: > >>> Communications link failure > >>> > >>> The last packet sent successfully to the server was 0 milliseconds > >>> ago. The driver has not received any packets from the server. Make > >>> sure your MySQL password in your AppVetProperties.xml file is > >>> correct > >>> > >>> > >>> I know for a fact that the MySQL password is correct in that XML > >>> file. I double checked it already. Any ideas on how I should fix > >>> this error? > >>> > >>> This is the script that I am using for startup/shutdown of Tomcat8 on > >>> boot: > >>> > >>> http://pastebin.com/mrvfDtTD > >>> > >>> Thanks! > >>> > >>> Sean > >>> > >> > >> It appears that your Tomcat process is running as root. Do not do this. > >> > >> Is your MySQL server up and running before Tomcat is started? > >> > >> . . . just my two cents > >> /mde/ > >> > >> > > Hello thank you for your response > > > > I created a user account for Tomcat, I will set the script to use that > > account instead of the root account. Question though, does this account > > need a password? > > Yes, especially since you'll be running a service. > > Note that if you're running Tomcat on a privileged port (less than > 1024), a non-root account will not be able to bind to this port. > > You have three choices. > > 1. iptables > > route port 80 to port 8080 (Tomcat default) internally. Take a look at > the iptables documentation. > > 2. jsvc > > jsvc from the Apache Commons Daemon project allows you to run a service > such as Tomcat more easily. I don't remember if there is an RPM for RHEL > or not (possible in EPEL). It's configuration and startup script are > different, but the documentation is a good start (there are Tomcat > examples). > > https://commons.apache.org/proper/commons-daemon/jsvc.html > > 3. Apache HTTPD front end with mod_proxy_ajp or mod_jk > > I'd do this if you need Apache HTTPD for other web applications (a PHP > application, perhaps). There is good documentation available on the > Tomcat web site, as well as a ton of discussion on the mailing list to > get this running. > > If you don't feel like building software, I'd recommend mod_proxy_ajp. I > find mod_jk more flexible and a little easier to use (opinions on easy > of use vary), but you'd have to build mod_jk from source. It's easy to > do, but some people find that a little more challenging. > > > > > Also, I cant tell if the MySQL server is up and running prior to Tomcat > > being started. I know that mysqld is enabled to start at boot, but I dont > > know if Tomcat starts prior to MySQL. How would I figure that out? > > > > I thought REHL 7 uses systemd and not init scripts? > > There have been many discussions on the mailing list concerning systemd > and Tomcat. I think someone has posted appropriate systemd scripts. > > If not, then look at /etc/rc3.d. Start and stop scripts are executed in > numerical order. Start scripts start with S, stop scripts start with K. > > Adjust the numbers in your Tomcat init script (/etc/initinit.d) so that > the start comes after MySQL (second number in the chkconfig line). > > You'll have to chkconfig --del and chkconfig --add to have the new > numbers take effect in /etc/rcx.d. > > > > > Thanks! > > > > . . . just my two cents > /mde/ > > > hello thank you for your response. So i decided to go the SystemD route and I found this article online: https://panovski.me/install-tomcat-8-on-centos-7/ I followed the instructions and instead of downloading Tomcat and installing it in /opt/tomcat, I copied the existing Tomcat installation, which was in /home/username, into /opt/tomcat and I gave the entire installation directory, an owner and group of tomcat. Then I set up the following tomcat.service unit file: [Unit] Description=Apache Tomcat Web Application Container After=network.target [Service] Type=forking PIDFile=/var/run/tomcat.pid Environment=CATALINA_PID=/var/run/tomcat.pid Environment=JAVA_HOME=/usr/java/jdk1.8.0_92 Environment=CATALINA_HOME=/opt/tomcat/apache-tomcat-8.0.35 Environment=CATALINA_BASE=/opt/tomcat/apache-tomcat-8.0.35 Environment=CATALINA_OPTS= ExecStart=/opt/tomcat/apache-tomcat-8.0.35/bin/jsvc \ -Dcatalina.home=${CATALINA_HOME} \ -Dcatalina.base=${CATALINA_BASE} \ -cp ${CATALINA_HOME}/bin/commons-daemon.jar:${CATALINA_HOME}/bin/bootstrap.jar:${CATALINA_HOME}/bin/tomcat-juli.jar \ -user tomcat \ -java-home ${JAVA_HOME} \ -pidfile /var/run/tomcat.pid \ -errfile SYSLOG \ -outfile SYSLOG \ $CATALINA_OPTS \ org.apache.catalina.startup.Bootstrap ExecStop=/opt/tomcat/bin/jsvc \ -pidfile /var/run/tomcat.pid \ -stop \ org.apache.catalina.startup.Bootstrap [Install] WantedBy=multi-user.target I set up JSVC as well just like how the article suggested, but when I run systemctl start tomcat and I try to browse to https://IP Address:8443 (I am using SSL on Tomcat), I get the following errors in the webbrowser: http://pastebin.com/8RANM5NF Any ideas on what I should do to resolve this issue? Thanks!
