When running on the donor node, the mariabackup and xtrabackup-v2 SST scripts unnecessarily convert the joiner's provided address to its host name. This happens in the following block of code:
setup_ports()
|
{
|
if [[ "$WSREP_SST_OPT_ROLE" == "donor" ]];then
|
SST_PORT=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $2 }')
|
REMOTEIP=$(echo $WSREP_SST_OPT_ADDR | awk -F ':' '{ print $1 }')
|
REMOTEHOST=$(getent hosts $REMOTEIP | awk '{ print $2 }')
|
if [[ -z $REMOTEHOST ]];then
|
REMOTEHOST=$REMOTEIP
|
fi
|
lsn=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $4 }')
|
sst_ver=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $5 }')
|
else
|
SST_PORT=$(echo ${WSREP_SST_OPT_ADDR} | awk -F ':' '{ print $2 }')
|
fi
|
}
|
https://github.com/MariaDB/server/blob/3d8aacba861044843417b710fff208b8bd6a53c4/scripts/wsrep_sst_mariabackup.sh#L504
https://github.com/MariaDB/server/blob/3d8aacba861044843417b710fff208b8bd6a53c4/scripts/wsrep_sst_xtrabackup-v2.sh#L496
This is probably not usually a big deal. However, it can cause issues when users try to work around the following socat bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695885
The existing functionality makes it difficult to work around this bug, because even if wsrep_node_address is set to a host name or IP address that is compatible with socat, the SST script might still resolve the provided address to one that causes socat to break with the following error:
2017/12/08 10:33:46 socat[23963] E getaddrinfo("10-1-1-237.mydomain.com", "(null)", {5,2,1,6}, {}): Name or service not known
|
Bug
Critical
