add fixes to run regression tests in Docker container (#14)

Removed useless commands from `concourse/scripts/entry.sh`, because our
docker images already have source of GPDB at `/home/gpadmin/gpdb_src`
and do not need to create or configure this directory.
Added file `arenadata/README.md` with information about how to run
tests at docker container.
Removed `--load-extension=diskquota_test` from `CMakeLists.txt` at regression
tests. Creating extension `diskquota_test` requires configured extension `diskquota`.
But `diskquota` is configured when `tests/regress/sql/config.sql` is executed, and
load-extension is done before this test is started. At all tests (where `diskquota_test`
is used) command `CREATE EXTENSION diskquota_test;` is executed.

arenadata/README.md

@@ -0,0 +1,28 @@
+# Run regression tests in Docker container
+
+You can build your Docker image from GPDB source or use prebuilt images from hub.adsw.io.
+How to build Docker image: (["readme.md"](https://github.com/arenadata/gpdb/blob/f7ff7c8ecae4ce7ab3b73fd46171cdaa457b3591/arenadata/readme.md)).
+
+1. Download the cmake-3.20 install script from ([source](https://github.com/Kitware/CMake/releases/download/v3.20.0/cmake-3.20.0-linux-x86_64.sh)).
+
+2. Build diskquota in the Docker container.
+Change <PATH_TO_DISKQUOTA_SRC> and <PATH_TO_CMAKE_INSTALL_SCRIPT> to the appropriate paths on your local machine.
+
+```
+docker run --rm -it -e DISKQUOTA_OS=rhel7 \
+       -v /tmp/diskquota_artifacts:/home/gpadmin/diskquota_artifacts \
+       -v <PATH_TO_DISKQUOTA_SRC>:/home/gpadmin/diskquota_src \
+       -v <PATH_TO_CMAKE_INSTALL_SCRIPT>:/home/gpadmin/bin_cmake/cmake-3.20.0-linux-x86_64.sh \
+       hub.adsw.io/library/gpdb6_regress:latest diskquota_src/concourse/scripts/entry.sh build
+```
+
+3. Run tests.
+Change <PATH_TO_DISKQUOTA_SRC> and <PATH_TO_CMAKE_INSTALL_SCRIPT> to the appropriate paths on your local machine.
+
+```
+docker run --rm -it --sysctl 'kernel.sem=500 1024000 200 4096' \
+       -v /tmp/diskquota_artifacts:/home/gpadmin/bin_diskquota \
+       -v <PATH_TO_DISKQUOTA_SRC>:/home/gpadmin/diskquota_src \
+       -v <PATH_TO_CMAKE_INSTALL_SCRIPT>:/home/gpadmin/bin_cmake/cmake-3.20.0-linux-x86_64.sh \
+       hub.adsw.io/library/gpdb6_regress:latest diskquota_src/concourse/scripts/entry.sh test
+```

concourse/scripts/entry.sh

@@ -108,15 +108,12 @@ setup_gpadmin() {
     fi
     mkdir -p /home/gpadmin
     chown gpadmin:gpadmin /home/gpadmin
-
-    chown -R gpadmin:gpadmin /tmp/build
-    ln -s "${CONCOURSE_WORK_DIR}"/* /home/gpadmin
 }
 
 # Extract gpdb binary
 function install_gpdb() {
     [ ! -d /usr/local/greenplum-db-devel ] && mkdir -p /usr/local/greenplum-db-devel
-    tar -xzf "${CONCOURSE_WORK_DIR}"/bin_gpdb/*.tar.gz -C /usr/local/greenplum-db-devel
+    tar -xzf "${CONCOURSE_WORK_DIR}"/bin_gpdb/bin_gpdb.tar.gz -C /usr/local/greenplum-db-devel
     chown -R gpadmin:gpadmin /usr/local/greenplum-db-devel
 }
 
@@ -130,21 +127,11 @@ function create_fake_gpdb_src() {
         grep -rhw '/usr/local/greenplum-db-devel' -e 'abs_top_srcdir = .*' |\
         head -n 1 | awk '{ print $NF; }')"
 
-    if [ -d "${fake_gpdb_src}" ]; then
-        echo "Fake gpdb source directory has been configured."
-        return
-    fi
-
     pushd /home/gpadmin/gpdb_src
     ./configure --prefix=/usr/local/greenplum-db-devel \
         --without-zstd \
         --disable-orca --disable-gpcloud --enable-debug-extensions
     popd
-
-    local fake_root
-    fake_root=$(dirname "${fake_gpdb_src}")
-    mkdir -p "${fake_root}"
-    ln -s /home/gpadmin/gpdb_src "${fake_gpdb_src}"
 }
 
 # Setup common environment

tests/CMakeLists.txt

@@ -15,7 +15,6 @@ RegressTarget_Add(regress
     SCHEDULE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/regress/diskquota_schedule${EXPECTED_DIR_SUFFIX}
     REGRESS_OPTS
     --load-extension=gp_inject_fault
-    --load-extension=diskquota_test
     --dbname=contrib_regression)
 
 RegressTarget_Add(isolation2