sergey-safarov commented on issue #5844:
URL: https://github.com/apache/couchdb/issues/5844#issuecomment-3751658174
@willholley i have modified your script
```sh
#1/bin/sh
set -o errexit -o nounset -o pipefail
MAINTENANCE_MODE=nolb
NODENAME=${NODENAME:-"localhost.localdomain"}
COUCHDB_ERLANG_COOKIE=${COUCHDB_ERLANG_COOKIE:-"monster"}
LB_GRACE_PERIOD=10 # seconds
# if you need IPv6 support then you shoud export
# ERL_FLAGS="-proto_dist inet6_tcp"
code_maintenance_mode() {
cat << EOF
io:format("~p~n", [rpc:call('couchdb@${NODENAME}', config, set,
["couchdb","maintenance_mode","${MAINTENANCE_MODE}",false])]), init:stop().
EOF
}
code_fabric_end_changes() {
cat << EOF
io:format("~p~n", [rpc:call('couchdb@${NODENAME}', fabric, end_changes,
[])]), init:stop().
EOF
}
# Put node into MM until restart (do not persist).
# This removes the pod from the load balancer backend
echo "Begin pre-stop."
echo -n "Setting maintenance mode: "
erl \
-setcookie ${COUCHDB_ERLANG_COOKIE} \
-name pre_stop@${NODENAME} \
-noshell \
-eval "$(code_maintenance_mode)"
while true; do
# sleep first to allow LB to drain connections
sleep ${LB_GRACE_PERIOD}
# stop any in-flight _changes requests
echo -n "Terminating _changes requests: "
erl \
-setcookie ${COUCHDB_ERLANG_COOKIE} \
-name pre_stop@${NODENAME} \
-noshell \
-eval "$(code_fabric_end_changes)"
connections=$(ss --no-header -nt state established "( sport = :5984 )"
| wc -l)
echo "Current connections on port 5984: $connections"
if [ $connections -eq 0 ]; then
echo "Connections dropped to 0. Exiting pre-stop."
break
fi
done
```
I think this can added into docker image as `/preStop.sh' and later called
from k8s.
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