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#!/bin/bash
source scripts/utils.sh
# These scripts require the following environment variables:
# - REVIEW_APPS_GCP_REGION - e.g `us-central1`
# - KUBE_NAMESPACE - e.g `review-apps-ee`
function delete_firewall_rules() {
if [[ ${#@} -eq 0 ]]; then
echoinfo "No firewall rules to be deleted" true
return
fi
echoinfo "Deleting firewall rules:" true
echo "${@}"
if [[ ${DRY_RUN} = 1 ]]; then
echo "[DRY RUN] gcloud compute firewall-rules delete -q" "${@}"
else
gcloud compute firewall-rules delete -q "${@}"
fi
}
function delete_forwarding_rules() {
if [[ ${#@} -eq 0 ]]; then
echoinfo "No forwarding rules to be deleted" true
return
fi
echoinfo "Deleting forwarding rules:" true
echo "${@}"
if [[ ${DRY_RUN} = 1 ]]; then
echo "[DRY RUN] gcloud compute forwarding-rules delete -q" "${@}" "--region ${REVIEW_APPS_GCP_REGION}"
else
gcloud compute forwarding-rules delete -q "${@}" --region "${REVIEW_APPS_GCP_REGION}"
fi
}
function delete_target_pools() {
if [[ ${#@} -eq 0 ]]; then
echoinfo "No target pools to be deleted" true
return
fi
echoinfo "Deleting target pools:" true
echo "${@}"
if [[ ${DRY_RUN} = 1 ]]; then
echo "[DRY RUN] gcloud compute target-pools delete -q" "${@}" "--region ${REVIEW_APPS_GCP_REGION}"
else
gcloud compute target-pools delete -q "${@}" --region "${REVIEW_APPS_GCP_REGION}"
fi
}
function delete_http_health_checks() {
if [[ ${#@} -eq 0 ]]; then
echoinfo "No http health checks to be deleted" true
return
fi
echoinfo "Deleting http health checks:" true
echo "${@}"
if [[ ${DRY_RUN} = 1 ]]; then
echo "[DRY RUN] gcloud compute http-health-checks delete -q" "${@}"
else
gcloud compute http-health-checks delete -q "${@}"
fi
}
function get_related_firewall_rules() {
local forwarding_rule=${1}
gcloud compute firewall-rules list --filter "name~${forwarding_rule}" --format "value(name)"
}
function get_service_name_in_forwarding_rule() {
local forwarding_rule=${1}
gcloud compute forwarding-rules describe "${forwarding_rule}" --region "${REVIEW_APPS_GCP_REGION}" --format "value(description)" | jq -r '.["kubernetes.io/service-name"]'
}
function forwarding_rule_k8s_service_exists() {
local namespace="${KUBE_NAMESPACE}"
local namespaced_service_name=$(get_service_name_in_forwarding_rule "$forwarding_rule")
if [[ ! $namespaced_service_name =~ ^"${namespace}" ]]; then
return 0 # this prevents `review-apps-ee` pipeline from deleting `review-apps-ce` resources and vice versa
fi
local service_name=$(echo "${namespaced_service_name}" | sed -e "s/${namespace}\///g")
kubectl get svc "${service_name}" -n "${namespace}" >/dev/null 2>&1
local status=$?
return $status
}
function gcp_cleanup() {
if [[ ! $(command -v kubectl) ]]; then
echoerr "kubectl executable not found"
return 1
fi
if [[ -z "${REVIEW_APPS_GCP_REGION}" ]]; then
echoerr "REVIEW_APPS_GCP_REGION is not set."
return 1
fi
if [[ -z "${KUBE_NAMESPACE}" ]]; then
echoerr "KUBE_NAMESPACE is not set."
return 1
fi
if [[ -n "${DRY_RUN}" ]]; then
echoinfo "Running in DRY_RUN"
fi
local target_pools_to_delete=()
local firewall_rules_to_delete=()
local forwarding_rules_to_delete=()
local http_health_checks_to_delete=()
for forwarding_rule in $(gcloud compute forwarding-rules list --filter="region:(${REVIEW_APPS_GCP_REGION})" --format "value(name)"); do
echoinfo "Inspecting forwarding rule ${forwarding_rule}" true
# We perform clean up when there is no more kubernetes service that require the resources.
# To identify the kubernetes service using the resources,
# we find the service name indicated in the forwarding rule description, e.g:
#
# $ gcloud compute forwarding-rules describe aff68b997da1211e984a042010af0019
# # ...
# description: '{"kubernetes.io/service-name":"review-apps-ee/review-winh-eslin-809vqz-nginx-ingress-controller"}'
# # ...
if forwarding_rule_k8s_service_exists "${forwarding_rule}"; then
echoinfo "Skip clean up for ${forwarding_rule}"
else
echoinfo "Queuing forwarding rule, firewall rule, target pool and health check for ${forwarding_rule} to be cleaned up"
firewall_rules_to_delete+=($(get_related_firewall_rules "${forwarding_rule}"))
forwarding_rules_to_delete+=(${forwarding_rule})
target_pools_to_delete+=(${forwarding_rule})
http_health_checks_to_delete+=(${forwarding_rule})
fi
done
delete_firewall_rules "${firewall_rules_to_delete[@]}"
delete_forwarding_rules "${forwarding_rules_to_delete[@]}"
delete_target_pools "${target_pools_to_delete[@]}"
delete_http_health_checks "${http_health_checks_to_delete[@]}"
}
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