[WIFI-6170] Add OpenWifi Docker Compose deployment with PostgreSQL (#20)

* Add wait-for-postgres.sh wrapper script

Signed-off-by: Johann Hoffmann <johann.hoffmann@mailbox.org>

* Copy wait-for-postgres.sh into Docker image

Signed-off-by: Johann Hoffmann <johann.hoffmann@mailbox.org>

Dockerfile

@@ -76,7 +76,7 @@ RUN addgroup -S "$OWFMS_USER" && \
 RUN mkdir /openwifi
 RUN mkdir -p "$OWFMS_ROOT" "$OWFMS_CONFIG" && \
     chown "$OWFMS_USER": "$OWFMS_ROOT" "$OWFMS_CONFIG"
-RUN apk add --update --no-cache librdkafka curl-dev mariadb-connector-c libpq unixodbc su-exec gettext ca-certificates bash jq curl
+RUN apk add --update --no-cache librdkafka curl-dev mariadb-connector-c libpq unixodbc su-exec gettext ca-certificates bash jq curl postgresql-client
 
 COPY --from=builder /owfms/cmake-build/owfms /openwifi/owfms
 COPY --from=builder /cppkafka/cmake-build/src/lib/* /lib/
@@ -86,6 +86,7 @@ COPY --from=builder /aws-sdk-cpp/cmake-build/aws-cpp-sdk-s3/libaws-cpp-sdk-s3.so
 
 COPY owfms.properties.tmpl /
 COPY docker-entrypoint.sh /
+COPY wait-for-postgres.sh /
 RUN wget https://raw.githubusercontent.com/Telecominfraproject/wlan-cloud-ucentral-deploy/main/docker-compose/certs/restapi-ca.pem \
     -O /usr/local/share/ca-certificates/restapi-ca-selfsigned.pem
 

wait-for-postgres.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# wait-for-postgres.sh
+
+set -e
+  
+host="$1"
+shift
+
+export PGUSER=$(grep 'storage.type.postgresql.username' $OWFMS_CONFIG/owfms.properties | awk -F '= ' '{print $2}')
+export PGPASSWORD=$(grep 'storage.type.postgresql.password' $OWFMS_CONFIG/owfms.properties | awk -F '= ' '{print $2}')
+  
+until psql -h "$host" -c '\q'; do
+  >&2 echo "Postgres is unavailable - sleeping"
+  sleep 1
+done
+  
+>&2 echo "Postgres is up - executing command"
+
+if [ "$1" = '/openwifi/owfms' -a "$(id -u)" = '0' ]; then
+    if [ "$RUN_CHOWN" = 'true' ]; then
+      chown -R "$OWFMS_USER": "$OWFMS_ROOT" "$OWFMS_CONFIG"
+    fi
+    exec su-exec "$OWFMS_USER" "$@"
+fi
+
+exec "$@"