From ec958071b2e14f78b4f8ad7a7aa07b1d3c13792c Mon Sep 17 00:00:00 2001
From: Piotr Biernat <keedosn@gmail.com>
Date: Wed, 7 Dec 2022 02:43:11 +0100
Subject: [PATCH] Added wait-for-it.sh script

---
 Dockerfile.target  |   6 +-
 bin/entrypoint.sh  |  25 +++++++
 bin/wait-for-it.sh | 165 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 195 insertions(+), 1 deletion(-)
 create mode 100755 bin/entrypoint.sh
 create mode 100755 bin/wait-for-it.sh

diff --git a/Dockerfile.target b/Dockerfile.target
index dd6760b..5dff45c 100644
--- a/Dockerfile.target
+++ b/Dockerfile.target
@@ -20,6 +20,10 @@ LABEL dev.egommerce.image.build_time=${BUILD_TIME}
 WORKDIR /
 COPY --from=builder $BIN_OUTPUT /app
 COPY .env.dist /.env
+COPY ./bin/entrypoint.sh ./bin/wait-for-it.sh /
+RUN chmod 755 /entrypoint.sh
 
 EXPOSE 80
-ENTRYPOINT ["/app"]
+
+CMD ["/app"]
+ENTRYPOINT ["/entrypoint.sh"]
diff --git a/bin/entrypoint.sh b/bin/entrypoint.sh
new file mode 100755
index 0000000..f77e6fa
--- /dev/null
+++ b/bin/entrypoint.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env sh
+set +e
+
+waitForService()
+{
+    ./wait-for-it.sh $1 -t 2 1>/dev/null 2>&1
+    status=$?
+    while [ $status != 0 ]
+    do
+        echo "[x] wating for $1..."
+        sleep 1
+        ./wait-for-it.sh $1 -t 2 1>/dev/null 2>&1
+        status=$?
+    done
+}
+
+waitForService "postgres-db:5432"
+waitForService "api-eventbus:5672"
+waitForService "api-logger:24224"
+waitForService "api-registry:8500"
+
+
+set -euo pipefail
+
+exec "$@"
diff --git a/bin/wait-for-it.sh b/bin/wait-for-it.sh
new file mode 100755
index 0000000..fff13c9
--- /dev/null
+++ b/bin/wait-for-it.sh
@@ -0,0 +1,165 @@
+#!/usr/bin/env sh
+#   Use this script to test if a given TCP host/port are available
+
+set -e
+
+cmdname=$(basename "$0")
+
+echoerr() {
+    if [ "$QUIET" -ne 1 ]; then
+        printf "%s\n" "$*" 1>&2;
+    fi
+}
+
+usage()
+{
+    exitcode="$1"
+    cat << USAGE >&2
+Usage:
+    $cmdname host:port [-s] [-t timeout] [-- command args]
+    -h HOST | --host=HOST       Host or IP under test
+    -p PORT | --port=PORT       TCP port under test
+                                Alternatively, you specify the host and port as host:port
+    -s | --strict               Only execute subcommand if the test succeeds
+    -q | --quiet                Don't output any status messages
+    -t TIMEOUT | --timeout=TIMEOUT
+                                Timeout in seconds, zero for no timeout
+    -- COMMAND ARGS             Execute command with args after the test finishes
+USAGE
+    exit "$exitcode"
+}
+
+wait_for()
+{
+    if [ "$TIMEOUT" -gt 0 ]; then
+        echoerr "$cmdname: waiting $TIMEOUT seconds for $HOST:$PORT"
+    else
+        echoerr "$cmdname: waiting for $HOST:$PORT without a timeout"
+    fi
+    start_ts=$(date +%s)
+    while true
+    do
+        nc -z "$HOST" "$PORT" >/dev/null 2>&1
+        result=$?
+        if [ $result -eq 0 ]; then
+            end_ts=$(date +%s)
+            echoerr "$cmdname: $HOST:$PORT is available after $((end_ts - start_ts)) seconds"
+            break
+        fi
+        sleep 1
+    done
+    return $result
+}
+
+wait_for_wrapper()
+{
+    # In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
+    if [ "$QUIET" -eq 1 ]; then
+        timeout "$TIMEOUT" "$0" -q -child "$HOST":"$PORT" -t "$TIMEOUT" &
+    else
+        timeout "$TIMEOUT" "$0" --child "$HOST":"$PORT" -t "$TIMEOUT" &
+    fi
+    PID=$!
+    trap 'kill -INT -$PID' INT
+    wait $PID
+    RESULT=$?
+    if [ $RESULT -ne 0 ]; then
+        echoerr "$cmdname: timeout occurred after waiting $TIMEOUT seconds for $HOST:$PORT"
+    fi
+    return $RESULT
+}
+
+TIMEOUT=15
+STRICT=0
+CHILD=0
+QUIET=0
+# process arguments
+while [ $# -gt 0 ]
+do
+    case "$1" in
+        *:* )
+        HOST=$(printf "%s\n" "$1"| cut -d : -f 1)
+        PORT=$(printf "%s\n" "$1"| cut -d : -f 2)
+        shift 1
+        ;;
+        --child)
+        CHILD=1
+        shift 1
+        ;;
+        -q | --quiet)
+        QUIET=1
+        shift 1
+        ;;
+        -s | --strict)
+        STRICT=1
+        shift 1
+        ;;
+        -h)
+        HOST="$2"
+        if [ "$HOST" = "" ]; then break; fi
+        shift 2
+        ;;
+        --host=*)
+        HOST=$(printf "%s" "$1" | cut -d = -f 2)
+        shift 1
+        ;;
+        -p)
+        PORT="$2"
+        if [ "$PORT" = "" ]; then break; fi
+        shift 2
+        ;;
+        --port=*)
+        PORT="${1#*=}"
+        shift 1
+        ;;
+        -t)
+        TIMEOUT="$2"
+        if [ "$TIMEOUT" = "" ]; then break; fi
+        shift 2
+        ;;
+        --timeout=*)
+        TIMEOUT="${1#*=}"
+        shift 1
+        ;;
+        --)
+        shift
+        break
+        ;;
+        --help)
+        usage 0
+        ;;
+        *)
+        echoerr "Unknown argument: $1"
+        usage 1
+        ;;
+    esac
+done
+
+if [ "$HOST" = "" -o "$PORT" = "" ]; then
+    echoerr "Error: you need to provide a host and port to test."
+    usage 2
+fi
+
+if [ $CHILD -gt 0 ]; then
+    wait_for
+    RESULT=$?
+    exit $RESULT
+else
+    if [ "$TIMEOUT" -gt 0 ]; then
+        wait_for_wrapper
+        RESULT=$?
+    else
+        wait_for
+        RESULT=$?
+    fi
+fi
+
+if [ "$*" != "" ]; then
+    if [ $RESULT -ne 0 -a $STRICT -eq 1 ]; then
+        echoerr "$cmdname: strict mode, refusing to execute subprocess"
+        exit $RESULT
+    fi
+    exec "$@"
+else
+    exit $RESULT
+fi