# the function reacting on SIGTERM command sent by the container on its shutdown. Makes sure all processes started (including
# mongodb) receive the signal. For MongoDB this results in graceful shutdown of replication (starting from 4.0.9) which may
# take some time. The script waits for all the processes to finish, otherwise the container would terminate as Kubernetes
# waits only for the process with pid #1 to end
cleanup (){
# Important! Keep this in sync with DefaultPodTerminationPeriodSeconds constant from constants.go
termination_timeout_seconds=600
script_log "Caught SIGTERM signal. Passing the signal to the automation agent and the mongod processes."
kill-15"$agentPid"
wait"$agentPid"
mongoPid="$(cat /data/mongod.lock)"
kill-15"$mongoPid"
script_log "Waiting until mongod process is shutdown. Note, that if mongod process fails to shutdown in the time specified by the 'terminationGracePeriodSeconds' property (default $termination_timeout_seconds seconds) then the container will be killed by Kubernetes."
# dev note: we cannot use 'wait' for the external processes, seems the spinning loop is the best option
while[-e"/proc/$mongoPid"];do sleep 0.1;done
script_log "Mongod and automation agent processes are shutdown"
}
# ensure_certs_symlinks function checks if certificates and CAs are mounted and creates symlinks to them
ensure_certs_symlinks (){
# the paths inside the pod. Move to parameters if multiple usage is needed
secrets_dir="/var/lib/mongodb-automation/secrets"
custom_ca_dir="${secrets_dir}/ca"
pod_secrets_dir="/mongodb-automation"
if[-d"${secrets_dir}/certs"];then
script_log "Found certificates in the host, will symlink to where the automation agent expects them to be"
podname=$(hostname)
if[!-f"${secrets_dir}/certs/${podname}-pem"];then
script_log "PEM Certificate file does not exist in ${secrets_dir}/certs/${podname}-pem. Check the Secret object with certificates is well formed."
