-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 David,
On 7/14/18 4:53 PM, David Babooram wrote: > Alright. > > I guess the thought the process was to upgrade to 6, then 7, 8 Having gone through exactly this process a few years ago (from 4.1 to 5.0 and continuing on up the major-version ladder until I was current), I can tell you that it was a collossal waste of our time to do everything incrementally. We have a very conservative test-to-prod pipeline at $work (where I'm personally responsible for that process) and so that transition took a few years. - From experience, I can tell you that going from 5.5 -> 6.0 is exactly as difficult as it will be to go from 5.5 -> 8.5. I personally recommend 8.5 over 9.0 due to some potential backward-incompatibilities you may encounter with 9.0 that don't exist in 8.5. An eventual migration from 8.5 -> 9.0 should be much less "scary" and easy for you to do. Here is exactly what you should do. There are 2 phases. Phase I - Prep your environment 1. Read the RUNNING.txt file that comes with Tomcat, especially the section titled "Advanced Configuration - Multiple Tomcat Instances". 2. Split your existing application configuration in Tomcat 5.5. such that you have a stock, un-altered Tomcat 5.5.x installation as your CATALINA_HOME and a CATALINA_BASE which contains your instance-specific configuration to support your application. 3. Make sure you aren't using any deployments from conf/server.xml. Specifically, there should be no <Context> elements in that file. If you have them there, there are better ways of doing deployments.[1] 4. Make sure everything still works. Once you have done this, everything else will be a lot easier. Phase II - Upgrade to your target version 0. Throw our all your existing Tomcat configuration. Well, almost. 1. Download a copy of 8.5.32 (current as of this writing) and unpack it into wherever it will eventually go. This will be your new CATALINA_HOME for your 8.5.x-based service. Don't change anything. Ever. 2. Create a new CATALINA_BASE structure for your 8.5.x-based service. 3. Compare your existing conf/server.xml file to the stock one from Phase I step 2 above. There shouldn't be really that many changes... usually just a few <Connector> definitions. Make appropriate similar changes to a *copy of* the conf/server.xml file that comes with the stock Tomcat 8.5.32 distribution and put that file into your new CATALINA_BASE/conf directory. 4. Stop your old 5.5-based service. Start your 8.5-based service. 5. Test everything. With any luck, you will just be good to go. If you find any problems, feel free to ask for some help on this list. For your next upgrade (e.g. 8.5.32 -> 8.5.33), simply do the following: 1. Unpack the new distribution into a NEW directory (e.g. apache-tomcat-8.5.33/). 2. Stop your 8.5.32-based service. 3. Change CATALINA_HOME to point to the new directory from step 1. 4. Start Tomcat. Patch-level upgrades should be just that simple every time. Moving between versions usually requires starting with a fresh conf/server.xml from the distribution and making modifications similar to those described in Phase II step 3. I hope that helps. - -chris [1] https://tomcat.apache.org/tomcat-8.5-doc/config/context.html#Defining_a_ context -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAltSAMwACgkQHPApP6U8 pFjsORAAg3OD5fRXxP9AsFd9TgjACHCd+yR20iG2Cd+ULBI7JNqleIL5aRXuE2GW u6NpJd0sBpq73Z8jJZOPS5Q0OD5bO8Hc9ngV5pqkHaAMgrROvD/EpI+pw5Ky/HNQ 42wipu+AeKlTR4UWON4XccbaEUz2cPQl8MueuLiMRJ9tMpUSNEhXUm6GTf1q4f+c WuEPSUsiHThi8tFCYp5EkkneZrfJO2t2fECsOJgflEKJyIds2X5JCL2NBQCfniqg KkiX5evjnDwyfZJ2voGm30m+G/XroDViLWAZ1RunXpibwzKExJWQDqtEslVgX5Jz xOPQL0xVgr0evtJ35sgOZGccQlaLy2us7t0/5zhvgXQeHmwguoIMZFAtrfNm5NOB D0rpkEBzGQVzrsj/O8LmFNhv/UesM7gT8XpHHzQOTbXDy/cOqcwer5HzrWLt4pjc dk+exvLQQBMMaStw6R6Jn7IJhOoCxot48L+kR41hzW+0gQo6nGDk9Siwvll4QmS2 tzJQrm74P2R55veju+W3xlUphUHPWTUk1btyr21xJ3H6CtnYDwXOYG7o+4s72Xcl wr4xtikNIzd5Sr2rUU7N9N4piAzgZg6ZKMqs8FAC+5+SRgeCDQhAxGVivrHddlbd yLotsopkPDYL6biL0UG0diBMwxBA/X9pttaJEZpGCkebF1unVRk= =x04i -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
