In summary, wsrep_node_address and wsrep_sst_receive_address can now
be set to IPv6 addresses escaped by []. Rsync SST works out ouf the
box thanks to rsync daemon listening on both IPv4 and IPv6 sockets by
default. For xtrabackup SST onver IPv6 one needs to set sockopt in
the [sst] section of joiner's configuration file to ",pf=ip6" if
using socat as a streamer or to "-6" if using netcat.
Synced xtrabackup SST scripts from PXC source tree as of PXC 5.6.27-25.13
- PXC#480: xtrabackup-v2 SST fails with multiple log_bin directives in my.cn
- PXC#460: wsrep_sst_auth don't work in Percona-XtraDB-Cluster-56-5.6.25-25.
- PXC-416: Fix SST related issues.
- PXC-389: Merge remote-tracking branch 'wsrep/5.6' into 5.6-wsrep-pxc389
- Bug #1431101: SST does not clobber backup-my.cnf
1. Passes wsrep_sst_auth_value to SST scripts via WSREP_SST_OPT_AUTH envronmental variable, so it never appears on the command line
2. In mysqldump and xtrabackup* SST scripts which rely on MySQL authentication, instead of passing password on the command line, SST script sets MYSQL_PWD environment variable, so that password also never appears on the mysqldump/innobackupex command line.
- LP1380697: wsrep_sst_xtrabackup-v2 doesn't stop when mysql is SIGKILLed. (full fix for this (as engineeered by Percona) requires Linux-specific patch that we don't carry, but keep xtrabackup scripts as close as possible)
- LP1399134: Log the innobackupex/SST logs in SST to syslog if possible. (fixed)
- LP1405668: Race condition between donor and joiner in PXB SST. (fixed)
- LP1405985: Fail early if xtrabackup_checkkpoints is missing. (fixed)
- LP1407599: wsrep_sst_xtrabackup-v2 script causes innobackupex to print a false positive stack trace into the log. (fixed)
- LP1441762: IST Fails with SST script error. (fixed)
- LP1451670: Fail when move-back fails in xtrabackup SST. (fixed)
1. Passes wsrep_sst_auth_value to SST scripts via WSREP_SST_OPT_AUTH envronmental variable, so it never appears on the command line
2. In mysqldump and xtrabackup* SST scripts which rely on MySQL authentication, instead of passing password on the command line, SST script sets MYSQL_PWD environment variable, so that password also never appears on the mysqldump/innobackupex command line.
