Last active
September 28, 2021 12:17
-
-
Save shokoe/3281d17c5966fa46b3937dc0f67224d8 to your computer and use it in GitHub Desktop.
AWS ELB/ALB Nagios check script
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/bash | |
region="--region us-east-1" | |
profile="" | |
elb_name="" | |
alb=false | |
while [[ $# > 0 ]]; do | |
key="$1" | |
case $key in | |
--elb) elb_name="${2/*lb./}";; | |
--region) region="--region $2";; | |
--profile) [ "$2" != "default" ] && profile="--profile $2";; | |
--type) [ "$2" == "alb" ] && alb=true;; | |
--warn) warn=$2;; | |
--crit) crit=$2;; | |
*) echo "Unknow option used"; exit 2;; | |
esac | |
shift; shift; | |
done | |
ins_id2name(){ | |
res_sed=`aws $profile $region ec2 describe-instances --output json |\ | |
jq -r '.Reservations[].Instances[] | "\(.InstanceId) \(if .Tags and ([.Tags[] | select ( .Key == "Name" )] != []) then .Tags[] | select ( .Key == "Name" ) | .Value else "%" end)"' |\ | |
grep -v % | sed 1d | sort -r |\ | |
awk '$2!="None"{printf "s#\\\b"$1"\\\b#"$2":"$1"#g;"};'` | |
cat | sed "$res_sed" | |
} | |
if [ "$elb_name" == "" ]; then | |
echo "missing --elb parameter!" | |
exit 1 | |
elif [[ "$elb_name" =~ io-geo ]]; then | |
elb_name="io-geo" | |
fi | |
if ! $alb ; then | |
ins=`aws $profile $region elb describe-instance-health --load-balancer-name $elb_name --output text |\ | |
grep -v registration | sed -r 's#.*(i-.*)#\1#' | awk '{print $1, $3}'` | |
ins_out="<pre>`( echo "Name:ID:Status"; echo \"$ins\" | sort | ins_id2name ) | sed 's#:# #g' | column -t`</pre>" | |
else | |
lbArn=`aws $profile $region elbv2 describe-load-balancers --names ${elb_name} \ | |
--query 'LoadBalancers[].[LoadBalancerArn]' --output text` | |
targetGroups=`aws $profile $region elbv2 describe-target-groups --load-balancer-arn $lbArn \ | |
--query 'TargetGroups[].[TargetGroupArn,Port]' --output text` | |
unset ins | |
while read garn port; do | |
tgname=$(echo $garn | sed -r 's#.*/([^/]*)/.*#\1#') | |
i=`aws $profile $region elbv2 describe-target-health --target-group-arn $garn \ | |
--query 'TargetHealthDescriptions[].[Target.Id,TargetHealth.State]' --output text |\ | |
sed "s#\t#:$tgname:$port #"` | |
ins="$ins | |
$i" | |
done < <(echo "$targetGroups") | |
ins=`echo "$ins" | sed '/^$/d'` | |
ins_out="<pre>`( echo "Name:ID:Target:Port:Status"; echo \"$ins\" | sort | ins_id2name ) | sed 's#:# #g' | column -t`</pre>" | |
fi | |
if [ -z "$ins" ]; then | |
echo "Unable to get instance list" | |
exit 2 | |
fi | |
if [[ ! `echo "$ins" | wc -l` = `echo "$ins" | grep -c '^i-'` ]]; then | |
echo "Bad api output" | |
echo "$ins" | |
exit 2 | |
fi | |
now=`date +%s` | |
while read name i launch; do | |
if (( now - `date +%s -d $launch` < 900 )); then | |
ins=$(echo "$ins" | sed "/$i/s#\$# (NewAS $(($now - `date +%s -d $launch`))sec)#") | |
fi | |
done< <(aws ec2 describe-instances $profile $region --instance-ids $(echo "$ins" | sed 's#:.*##' | awk '{print $1}') --query 'Reservations[].Instances[].[Tags[?Key==`Name`].Value|[0],InstanceId,LaunchTime]' --output text); | |
ins_check=`echo "$ins" | grep -v '\<draining\>|\<initial\>|\<(NewAS)\>'` | |
ins_cnt=`echo "$ins_check" | wc -l` | |
ins_act=`echo "$ins_check" | egrep -c '\<InService\>|\<healthy\>|\<draining\>|\<initial\>|\<NewAS\>'` | |
perf="registered=$ins_cnt;0;0; InService=$ins_act;$(($ins_cnt/2));1;" | |
if [ ! $ins_cnt -eq $ins_act ]; then | |
echo "Found $(($ins_cnt-$ins_act)) endpoints not active | $perf" | |
echo "$ins_out" | |
exit 2 | |
elif [ $ins_act -le $crit ]; then | |
echo "Found $ins_act/$ins_cnt (<=$crit) active | $perf" | |
echo "$ins_out" | |
exit 2 | |
elif [ $ins_act -le $warn ]; then | |
echo "Found $ins_act/$ins_cnt (<=$warn) active | $perf" | |
echo "$ins_out" | |
exit 1 | |
else | |
echo "All $ins_cnt (>$warn) endpoints are active | $perf" | |
echo "$ins_out" | |
exit 0 | |
fi | |
exit 2 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment