>>> Salvatore D'Angelo <sdang...@it.ibm.com> schrieb am 16.11.2017 um 10:27 in Nachricht <of00a65cc0.d7f34dbc-on002581da.00318715-c12581da.0033e...@notes.na.collabserv.c m>: > Hi All, > > I am working on a PostgreSQL cluster managed using Pacemaker and Corosync. > The cluster is composed by three nodes: Master, Sync and Async. > Currently my cluster uses PostgreSQL 9.4.9 and I am going to upgrade my > environments to 9.6.3. > > My upgrade procedure uses the following steps: > > 1. install 9.6.3 binaries on all the three nodes > 2. crm node standby of all the three nodes > 3. create new data directory on all the three nodes > 4. only on master node do initdb on data directory > 5. pg_upgrade from old to the new directory > 6. update postgresql.conf file > 7. start postgres with pg_ctl command > 8. stop postgres with pg_ctl command > 9. crm node online <master node> > > on the others two nodes: > 10. pg_base_backup to align slave node with master > 11. crm node online <slave node> > > Now I have two questions: > 1. In order to have the master working properly I needed step 7 and 8 in > order to let master recognize the status of the cluster before the upgrade > and let it recognize the others node and go in hot standby mode. Is this > start/sto really required or there is another way to have master start > from the status before the upgrade? > > 2. On test environment this procedure works fine. In production, two times > happened that when I start nodes in step 9 the slaves start as well. Is > this possible? In which case this could happen?
My guess is this: You disable nodes (via standby), but you don't stop the services. So if one nodes gets online, it could run all services (unless contraints forbid that) Regards, Ulrich > > Salvatore D'Angelo > Advisory Software Engineer - IBM Cloud > IBM Rome Software Lab > Via Sciangai 53, 00144 Roma > Phone +39-347-432-8059 > > > IBM Italia S.p.A. Sede Legale: Circonvallazione Idroscalo - 20090 Segrate > (MI) Cap. Soc. euro 347.256.998,80 C. F. e Reg. Imprese MI 01442240030 - > Partita IVA 10914660153 Societa' con unico azionista Societa' soggetta > all'attivita' di direzione e coordinamento di International Business > Machines Corporation (Salvo che sia diversamente indicato sopra / Unless > stated otherwise above) _______________________________________________ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
