Fix the errors introduced into smoke-test from the refactor.

Author: wrouesnel

cmd/postgres_exporter/tests/test-smoke

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -x
 # Basic integration tests with postgres. Requires docker to work.
 
 SOURCE="${BASH_SOURCE[0]}"
@@ -38,39 +38,41 @@ VERSIONS=( \
 wait_for_postgres(){
     local ip=$1
     local port=$2
-    if [ -z $ip ]; then
+    if [ -z "$ip" ]; then
         echo "No IP specified." 1>&2
         exit 1
     fi
 
-    if [ -z $port ]; then
+    if [ -z "$port" ]; then
         echo "No port specified." 1>&2
         exit 1
     fi
 
     local wait_start
     wait_start=$(date +%s) || exit 1
     echo "Waiting for postgres to start listening..."
-    while ! pg_isready --host=$ip --port=$port &> /dev/null; do
-        if [ $(( $(date +%s) - $wait_start )) -gt $TIMEOUT ]; then
+    while ! pg_isready --host="$ip" --port="$port" &> /dev/null; do
+        if [ $(( $(date +%s) - wait_start )) -gt "$TIMEOUT" ]; then
             echo "Timed out waiting for postgres to start!" 1>&2
             exit 1            
         fi
         sleep 1
     done
+    echo "Postgres is online at $ip:$port"
 }
 
 wait_for_exporter() {
     local wait_start
     wait_start=$(date +%s) || exit 1
     echo "Waiting for exporter to start..."
-    while ! nc -z localhost $exporter_port ; do
-        if [ $(( $(date +%s) - $wait_start )) -gt $TIMEOUT ]; then
+    while ! nc -z localhost "$exporter_port" ; do
+        if [ $(( $(date +%s) - wait_start )) -gt "$TIMEOUT" ]; then
             echo "Timed out waiting for exporter!" 1>&2
             exit 1            
         fi
         sleep 1
     done
+    echo "Exporter is online at localhost:$exporter_port"
 }
 
 smoketest_postgres() {
@@ -89,22 +91,24 @@ smoketest_postgres() {
 
     CONTAINER_NAME=$($docker_cmd)
     standalone_ip=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $CONTAINER_NAME)
+    # shellcheck disable=SC2064
     trap "docker logs $CONTAINER_NAME ; docker kill $CONTAINER_NAME ; docker rm -v $CONTAINER_NAME; exit 1" EXIT INT TERM
-    wait_for_postgres $standalone_ip 5432
-
+    wait_for_postgres "$standalone_ip" 5432
 
     # Run the test binary.
     DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$standalone_ip:5432/?sslmode=disable" $test_binary || exit $?
 
     # Extract a raw metric list.
-    DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$standalone_ip:5432/?sslmode=disable" $postgres_exporter --log.level=debug --web.listen-address=:$exporter_port &
+    DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$standalone_ip:5432/?sslmode=disable" $postgres_exporter \
+        --log.level=debug --web.listen-address=:$exporter_port &
     exporter_pid=$!
+    # shellcheck disable=SC2064
     trap "docker logs $CONTAINER_NAME ; docker kill $CONTAINER_NAME ; docker rm -v $CONTAINER_NAME; kill $exporter_pid; exit 1" EXIT INT TERM
     wait_for_exporter
 
     # Dump the metrics to a file.
-    if wget -q -O - http://localhost:$exporter_port/metrics 1> "$METRICS_DIR/.metrics.single.$version.prom" ; then
-        echo "Failed on postgres $version ($DOCKER_IMAGE)" 1>&2
+    if ! wget -q -O - http://localhost:$exporter_port/metrics 1> "$METRICS_DIR/.metrics.single.$version.prom" ; then
+        echo "Failed on postgres $version (standalone $DOCKER_IMAGE)" 1>&2
         kill $exporter_pid
         exit 1
     fi
@@ -117,8 +121,8 @@ smoketest_postgres() {
     fi
 
     kill $exporter_pid
-    docker kill $CONTAINER_NAME
-    docker rm -v $CONTAINER_NAME
+    docker kill "$CONTAINER_NAME"
+    docker rm -v "$CONTAINER_NAME"
     trap - EXIT INT TERM
 
     echo "#######################"
@@ -127,7 +131,7 @@ smoketest_postgres() {
     old_pwd=$(pwd)
     cd docker-postgres-replication || exit 1
 
-    if VERSION="$version" p2 -t Dockerfile.p2 -o Dockerfile ; then
+    if ! VERSION="$version" p2 -t Dockerfile.p2 -o Dockerfile ; then
         echo "Templating failed" 1>&2
         exit 1
     fi
@@ -146,14 +150,15 @@ smoketest_postgres() {
 
     DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$master_ip:5432/?sslmode=disable" $test_binary || exit $?
 
-    DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$master_ip:5432/?sslmode=disable" $postgres_exporter --log.level=debug --web.listen-address=:$exporter_port &
+    DATA_SOURCE_NAME="postgresql://postgres:$POSTGRES_PASSWORD@$master_ip:5432/?sslmode=disable" $postgres_exporter \
+        --log.level=debug --web.listen-address=:$exporter_port &
     exporter_pid=$!
     # shellcheck disable=SC2064
     trap "docker-compose logs; docker-compose down ; docker-compose rm -v ; kill $exporter_pid; exit 1" EXIT INT TERM
     wait_for_exporter
 
-    if wget -q -O - http://localhost:$exporter_port/metrics 1> "$METRICS_DIR/.metrics.replicated.$version.prom" ; then
-        echo "Failed on postgres $version ($DOCKER_IMAGE)" 1>&2
+    if ! wget -q -O - http://localhost:$exporter_port/metrics 1> "$METRICS_DIR/.metrics.replicated.$version.prom" ; then
+        echo "Failed on postgres $version (replicated $DOCKER_IMAGE)" 1>&2
         exit 1
     fi