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Diffstat (limited to 'dnstraffic.sh')
| -rw-r--r-- | dnstraffic.sh | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/dnstraffic.sh b/dnstraffic.sh new file mode 100644 index 00000000..808a7b53 --- /dev/null +++ b/dnstraffic.sh @@ -0,0 +1,34 @@ +#!/bin/bash +# +# This script is run by the policy closed loop to generate traffic (DNS packets) to the DNS +# +# Usage: dnstraffic.sh <DNSIP> <RATE_PER_SEC> <ITERATIONS> +# +# The DNSIP is that of the DNS vLoadBalancer. +# The RATE_PER_SEC is the approximate number of nslookup requests generated per second. +# The ITERATIONS is roughly the number of seconds to run the test. Note that the Robot +# will kill this script after the validation is complete. +# +# The validation portion of the script has done a successful lookup, so the point of +# these requests is to generate DNS packets. We do not care about the results. The timeout +# of 1 second is to ensure we do not flood the process table with long waits +# on failed lookups. +# +# We generate an approximate rate because we sleep for a full second so the RATE_PER_SEC +# should have some slop in it. We only need to drive this to 20+ per second, so a 35 +# per second should fall within the range to trigger the polciy check and prvide enough +# to validate even distribution without spawning a 3rd DNS +# +DNSIP=$1 +RATE_PER_SEC=$2 +ITERATIONS=$3 +ITERATIONS=${ITERATIONS:-300} + +for iter in `seq 1 $ITERATIONS`; +do + for i in `seq 1 $RATE_PER_SEC`; + do + nslookup -timeout=1 host2.dnsdemo.openecomp.org $DNSIP >/dev/null 2>&1 & + done + sleep 1 +done |