garb: nc: invalid option -- 'z' on centos 7

[Martynas Sklizmantas]

cannot run garbd on centos 7, it fails with:

garb[]: nc: invalid option -- 'z'
garb[]: Ncat: Try `--help' or man(1) ncat for more information, usage options and help. QUITTING.

nc provided with nmap-ncat-6.40-4.el7.x86_64 package

[Raghavendra D Prabhu (raghavendra-prabhu)]

You will need openbsd-netcat for this.

[Martynas Sklizmantas (saint-ghost)]

it is not available in default repositories and epel. are you suggesting to use other 3d party repos? the garbd package should fail dependency check upon install i think.

[Raghavendra D Prabhu (raghavendra-prabhu)]

nc available in base has the -z option in centos6.

However, in centos7 it is not available and nmap-ncat has replaced it.

[Raghavendra D Prabhu (raghavendra-prabhu)]

 diff --git a/garb/files/garb.sh b/garb/files/garb.sh
 index 66d2d94..66df2a1 100755
 --- a/garb/files/garb.sh
 +++ b/garb/files/garb.sh
 @@ -124,7 +124,14 @@ start() {
                 HOST=$(echo $ADDRESS | cut -d \: -f 1 )
                 PORT=$(echo $ADDRESS | cut -d \: -f 2 )
                 PORT=${PORT:-$GALERA_PORT}
 - nc -z $HOST $PORT >/dev/null && break
 + if nc -h 2>&1 | grep -q -- '-z';then
 + nc -z $HOST $PORT >/dev/null && break
 + elif [[ -x `which nmap` ]];then
 + nmap -Pn -p$PORT $HOST | grep -q 'Host is up' && break
 + else
 + log_failure "Neither netcat nor nmap are present for zero I/O scanning"
 + return 1
 + fi
         done
         if [ ${ADDRESS} == "0" ]; then
                 log_failure "None of the nodes in $GALERA_NODES is accessible"

[Raghavendra D Prabhu (raghavendra-prabhu)]

https://github.com/codership/galera/issues/93

[Raghavendra D Prabhu (raghavendra-prabhu)]

For nmap,

nmap -Pn -p$PORT $HOST | awk "\$1 ~ /$PORT/ {print \$2}" | grep open

is required.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXC-1709