Basic database test

stack_orchestrator/data/compose/docker-compose-test-database.yml

@@ -1,4 +1,5 @@
 services:
+
   database:
     image: cerc/test-database-container:local
     restart: always
@@ -11,6 +12,9 @@ services:
       POSTGRES_INITDB_ARGS: "-E UTF8 --locale=C"
     ports:
       - "5432"
+
+  test-client:
+    image: cerc/test-database-client:local
 
 volumes:
   db-data:

stack_orchestrator/data/container-build/cerc-test-database-client/Dockerfile

@@ -0,0 +1,12 @@
+FROM ubuntu:latest
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive && export DEBCONF_NOWARNINGS="yes" && \
+    apt-get install -y software-properties-common && \
+    apt-get install -y postgresql-client && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+EXPOSE 80
+
+COPY run.sh /app/run.sh
+
+ENTRYPOINT ["/app/run.sh"]

stack_orchestrator/data/container-build/cerc-test-database-client/build.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+# Build cerc/test-container
+source ${CERC_CONTAINER_BASE_DIR}/build-base.sh
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+docker build -t cerc/test-database-client:local -f ${SCRIPT_DIR}/Dockerfile ${build_command_args} $SCRIPT_DIR

stack_orchestrator/data/container-build/cerc-test-database-client/run.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -e
+if [ -n "$CERC_SCRIPT_DEBUG" ]; then
+  set -x
+fi
+
+# TODO derive this from config
+database_url="postgresql://test-user:password@localhost:5432/test-db"
+psql_command="psql ${database_url}"
+
+does_test_data_exist () {
+    query_result=$(${psql_command} -t -c "select count(*) from test_table_1 where key_column = 'test_key_1';" | head -1 | tr -d ' ')
+    if [[ "${query_result}" == "1" ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+create_test_data () {
+    ${psql_command} -c "create table test_table_1 (key_column text, value_column text, primary key(key_column));"
+    ${psql_command} -c "insert into test_table_1 values ('test_key_1', 'test_value_1');"
+}
+
+wait_forever() {
+    # Loop to keep docker/k8s happy since this is the container entrypoint
+    while :; do sleep 600; done
+}
+
+# Check if the test database content exists already
+if does_test_data_exist; then
+    # If so, log saying so. Test harness will look for this log output
+    echo "Database test client: test data already exists"
+else
+    # Otherwise log saying the content was not present
+    echo "Database test client: test data does not exist"
+    echo "Database test client: creating test data"
+    # then create it
+    create_test_data
+fi
+
+wait_forever

stack_orchestrator/data/stacks/test-database/stack.yml

@@ -4,5 +4,6 @@ description: "A test database stack"
 repos:
 containers:
   - cerc/test-database-container
+  - cerc/test-database-client
 pods:
   - test-database