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38 lines
795 B
Bash
38 lines
795 B
Bash
# overwrite get_nodename to discover hostname from DNS
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get_nodename() {
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local hostname=${HOSTNAME}
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# get hostname from dns
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if ( is_true ${USE_DNS} ); then
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# wait for dns registration
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sleep 1
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nodename=$(discover_dns_hostname ${HOSTIP})
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is_set ${nodename} \
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&& hostname=${nodename}
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fi
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echo $hostname
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return 0
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}
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# discover hostname from dns with a reverse lookup
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discover_dns_hostname() {
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local hostip=$1
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# try to get the hostname from dns
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local dnsname=$(drill -x ${hostip} \
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| grep PTR \
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| awk '{print $5}' \
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| grep -E "^[a-zA-Z0-9]+([-._]?[a-zA-Z0-9]+)*.[a-zA-Z]+\.$" \
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| cut -d '.' -f1 \
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| tail -1)
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is_set ${dnsname} \
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&& echo ${dnsname}
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return 0
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}
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