Add ability to upload logical backup to gcs (#1173)

Support logical backup provider/storage S3 and GCS equivalent

docker/logical-backup/Dockerfile

@@ -13,7 +13,10 @@ RUN apt-get update     \
         curl \
         jq \
         gnupg \
+        gcc \
+        libffi-dev \
     && pip3 install --no-cache-dir awscli --upgrade \
+    && pip3 install --no-cache-dir gsutil --upgrade \
     && echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
     && cat /etc/apt/sources.list.d/pgdg.list \
     && curl --silent https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \

docker/logical-backup/dump.sh

@@ -46,6 +46,23 @@ function aws_upload {
     aws s3 cp - "$PATH_TO_BACKUP" "${args[@]//\'/}"
 }
 
+function gcs_upload {
+    PATH_TO_BACKUP=gs://$LOGICAL_BACKUP_S3_BUCKET"/spilo/"$SCOPE$LOGICAL_BACKUP_S3_BUCKET_SCOPE_SUFFIX"/logical_backups/"$(date +%s).sql.gz
+
+    gsutil -o Credentials:gs_service_key_file=$LOGICAL_BACKUP_GOOGLE_APPLICATION_CREDENTIALS cp - "$PATH_TO_BACKUP"
+}
+
+function upload {
+    case $LOGICAL_BACKUP_PROVIDER in
+        "gcs")
+            gcs_upload
+            ;;
+        *)
+            aws_upload $(($(estimate_size) / DUMP_SIZE_COEFF))
+            ;;
+    esac
+}
+
 function get_pods {
     declare -r SELECTOR="$1"
 
@@ -93,7 +110,7 @@ for search in "${search_strategy[@]}"; do
 done
 
 set -x
-dump | compress | aws_upload $(($(estimate_size) / DUMP_SIZE_COEFF))
+dump | compress | upload
 [[ ${PIPESTATUS[0]} != 0 || ${PIPESTATUS[1]} != 0 || ${PIPESTATUS[2]} != 0 ]] && (( ERRORCOUNT += 1 ))
 set +x