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authorJack Lucas <jflos@sonoris.net>2021-08-13 13:57:37 -0400
committerJack Lucas <jflos@sonoris.net>2021-08-23 12:59:54 -0400
commitc9ac0562f56d928c4ecbdcf5db4bfac34b2d9ff6 (patch)
treeee6b0beb6d3a42e3ef01d60eac29e372d8d565b6 /consul-loader-container/delete_key.sh
parent33f297d69913c9a0ae89bd37ab42ebba108f0dc5 (diff)
Add unconditional Consul key delete1.1.1-consul-loader-container
Add a script to consul-loader-container that attempts to delete a Consul key and ignores failures rather than looping indefinitely. This will allow us to safely add a k8s Job to each DCAE microservice's Helm chart to delete the microservice's Consul configuration key when the microservice is undeployed using Helm. Issue-ID: DCAEGEN2-2669 Signed-off-by: Jack Lucas <jflos@sonoris.net> Change-Id: I0e9534c4b488d3a3f7248434712900ed5b593489
Diffstat (limited to 'consul-loader-container/delete_key.sh')
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1 files changed, 50 insertions, 0 deletions
diff --git a/consul-loader-container/delete_key.sh b/consul-loader-container/delete_key.sh
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+#!/bin/bash
+# ================================================================================
+# Copyright (c) 2021 J. F. Lucas. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============LICENSE_END=========================================================
+
+# Delete a single key-value pair from the Consul KV store, with no error checking.
+# (To have full error checking, using the --delete-key option on the consul_store.sh
+# script.)
+# This script is intended for use with a Kubernetes Job that deletes the Consul KV pair
+# holding the application configuration data for a DCAE microservice, when the microservice
+# is undeployed via Helm. The reason for ignoring errors is that sometimes when a full
+# ONAP deployment is being undeployed, Consul becomes unavailable before a microservice
+# is deleted. If we do a Consul delete with error checking using the consul.sh script,
+# the Kubernetes Job loops indefinitely waiting for Consul to become available. This
+# script simply sends a delete key request to Consul and ignores the result.
+#
+# Note that failing to delete the application configuration from Consul is
+# not harmful. If a DCAE microservice is undeployed then deployed again, the
+# configuration information for the new instance will overwrite the old configuration.
+#
+# Environment variables control the Consul address used:
+# -- CONSUL_PROTO: The protocol (http or https) used to access consul. DEFAULT: http
+# -- CONSUL_HOST: The Consul host address. DEFAULT: consul
+# -- CONSUL_PORT: The Consul API port. DEFAULT: 8500
+#
+# The command accepts a single argument, the name of the key to be deleted.
+#
+set -x
+CONSUL_ADDR=${CONSUL_PROTO:-http}://${CONSUL_HOST:-consul}:${CONSUL_PORT:-8500}
+KV_URL=${CONSUL_ADDR}/v1/kv
+
+if [ "$#" -lt 1 ]
+then
+ echo "Command requires at least one argument"
+ exit 0 # deliberately masking the error
+fi
+curl -v -X DELETE "${KV_URL}/$1"
+exit 0 # mask any error