Merge pull request #4144 from telefonicaid/task/add_healthcheck_docker

add docker healthcheck based on API /version

CHANGES_NEXT_RELEASE

@@ -1,3 +1,4 @@
+- Add: Docker healthcheck based on context broker API
 - Add: support for Feature and FeaturesCollection GeoJSON types (normalizing geometries) in entity locations (#4114)
 - Add: support to null element in string list filters (e.g. q=A:foo,null) (#4120)
 - Add: improve BadInput logs with extra information when available (#4121)

docker/Dockerfile

@@ -128,7 +128,6 @@ RUN \
            /opt/fiware-orion && \
     # remove the same packages we installed at the beginning to build Orion
     apt-get -y remove --purge \
-      curl \
       cmake \
       libssl-dev \
       git \
@@ -170,3 +169,8 @@ LABEL "org.opencontainers.image.source"=https://github.com/${GITHUB_ACCOUNT}/${G
 RUN sed -i -r "/^(root|nobody)/!d" /etc/passwd /etc/shadow /etc/group \
     && sed -i -r 's#^(.*):[^:]*$#\1:/sbin/nologin#' /etc/passwd
 USER nobody
+
+HEALTHCHECK --interval=60s --timeout=5s --start-period=10s \
+            # Note we cannot use GET /version for healthchecking as that operation is working even in the case
+            # the database is down. In this sense, GET /v2/entities is better, as it touches database
+            CMD curl --fail -X GET http://localhost:1026/v2/entities?limit=1 || exit 1