K8SPXC-1475 add missing lib for 5.7 backup (#1124)

percona-xtradb-cluster-5.7-backup/lib/pxc/aws.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -o errexit
+
+export AWS_SHARED_CREDENTIALS_FILE='/tmp/aws-credfile'
+export AWS_ENDPOINT_URL="${ENDPOINT:-https://s3.amazonaws.com}"
+export AWS_REGION="${DEFAULT_REGION:-us-west-2}"
+
+if [ -n "$VERIFY_TLS" ] && [[ $VERIFY_TLS == "false" ]]; then
+	AWS_S3_NO_VERIFY_SSL='--no-verify-ssl'
+fi
+
+is_object_exist() {
+	local bucket="$1"
+	local object="$2"
+
+	aws $AWS_S3_NO_VERIFY_SSL s3api head-object  --bucket $bucket --key "$object" || NOT_EXIST=true
+	if [[ -z "$NOT_EXIST" ]]; then
+		return 1
+	fi
+}
+
+s3_add_bucket_dest() {
+	{ set +x; } 2>/dev/null
+	aws configure set aws_access_key_id "$ACCESS_KEY_ID"
+	aws configure set aws_secret_access_key "$SECRET_ACCESS_KEY"
+	set -x
+}
+