-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 André,
On 4/3/14, 5:14 AM, André Warnier wrote: > bjoern.bec...@easycash.de wrote: >>> -----Ursprüngliche Nachricht----- Von: Christopher Schultz >>> [mailto:ch...@christopherschultz.net] Gesendet: Mittwoch, 2. >>> April 2014 22:33 An: Tomcat Users List Betreff: Re: AW: grab >>> hostname from tomcat manager >>> >>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 >>> >>> Bjorn, >>> >>> On 4/2/14, 10:54 AM, bjoern.bec...@easycash.de wrote: >>>>> -----Ursprüngliche Nachricht----- Von: André Warnier >>>>> [mailto:a...@ice-sa.com] Gesendet: Mittwoch, 2. April 2014 >>>>> 16:35 An: Tomcat Users List Betreff: Re: grab hostname from >>>>> tomcat manager >>>>> >>>>> bjoern.bec...@easycash.de wrote: >>>>>> Hello, >>>>>> >>>>>> I need to grab the hostname from the tomcat manager >>>>>> somehow. Unfortunately this URL "manager/text/serverinfo" >>>>>> doesn't contain >>> the >>>>> hostname. >>>>>> Is there any other smart way to receive the hostname via >>>>>> tomcat >>>>> manager app? For give me for asking, but how do you access >>>>> the tomcat manager if you do not know the hostname ? >>>> Good question :). But I got a good reason for it. >>>> >>>> I got two servers with several tomcat instances. In front of >>>> them is >>> a >>>> loadbalancer with is configured to do a failover. >>>> >>>> -LB- / \ Server1:8081 Server2:8081 >>>> >>>> I need to write a shell script to sync a specific directory >>>> and for each tomcat instance I need to know on which one the >>>> loadbalancer is targeting at the moment. >>> How will you check to see which one the lb is targeting? >> >> That's the question. >>>> If tomcat 8081 on server 1 is down, the loadbalancer will >>>> point to server 2 tomcat 8081. I can find it out through the >>>> loadbalancer address only. >>> You should probably set a jvmRoute in your <Engine> in >>> server.xml. That way, you can detect which back-end server you >>> are getting just by looking at the JSESSIONID cookie. >> >> That's the answer. When jvmroute is define I easily can receive >> the jsession id with wget: >> >> wget -q -O - --no-cache --keep-session-cookies >> --no-check-certificate --save-cookies cookies.txt >> https://loadbalanceraddress:8081/manager >> --user=user--password=secure 1>/dev/null >> >> perfect! > > Alternatively, I suppose that you could just create a small JSP (or > even HTML, but then host-specific) page in each host, which returns > the real hostname. > > You should probably be careful however : in your rsync scenario > above, is there any guarantee that between the time you ask for the > hostname (in whatever way), and the time at which you do your > rsync, the "targeted host" will still be the same ? Remember that > if things /can/ happen, they /do/ happen. I still don't really grok the use case, here, but if you use a bogus JSESSIONID (like GimmieMyServer.jvmRoute), you can select the backend server if you are using a load balancer that understands what the jvmRoute means (like mod_jk does, for instance). - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJTPYd6AAoJEBzwKT+lPKRYHngQAJ6zTouqqV4riBzgB6peRFTT PxMGOT/yEfWxPnja8ZUeY9XRT6n3N07eg6vyELEOVSBMyXZSeeyef7mOomUPgrZz /ADu7tieCE/bUkW24xrOs4Uklw+1AmeYwheTZ5bztHZRhkGpEqEExQD/E/6lVnQH OpNv1MWIkUumk3f3UeIviibyrv/AAdCxgjukAgFkk2zWTAcLtYgBZ1psS8NpDUO8 ynM0drQuThCpdZmfCjSQWC+V+U7PS2Qc8L5q9xYm6dnilDhUp0YDW0Gf3/zTUudX gBXTkE9XN2AnG6UnP+st//Jrwwjjw8PEL6u6q1fpThSyWRq9A8A8yYHm4O6qYMiW A/YtOHlyGZ7L4E2T+bshz56AInEUEKEVSjdlZH95W17zgOlVqgWuFZAQG59Yow2D U18NEN4PnFOjxwsMY6VdpK3tSL+Tu3EazYt0qfyhV/vguhufOpNjNoZC6hfDyh5C zdcV8kKdogvjhl2zR9yjm+nFOIEH6B+TiQB96/XphX7MBY7DYJFwOkshDPN6dd0w PwSXCbuX9i7WMEYPNmkqK1fgPtqqVdx7Sj586OYThEi3SVNhP2+owx0/OEqhuYey BOm+i2z+FTzS87q20PV7tOsJbh5H5JkHxP6MXNVSY4Yah+XUbYCo9VU8LxbgTmDZ jCNjBmv4hnYMmvZFdzzX =6lZK -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
