Moved waitforit into Dockerfile, added to cont-init.d

Dockerfile

@@ -23,6 +23,9 @@ COPY root /
 # Note: Tweak this line if you're running anything other than x86 AMD64 (64-bit).
 RUN curl -L -s https://github.com/just-containers/s6-overlay/releases/download/v1.19.1.1/s6-overlay-amd64.tar.gz | tar xvzf - -C /
 
+# Add wait-for-it.sh
+ADD https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh /srv
+
 # Expose Nginx ports.
 EXPOSE 8080
 EXPOSE 4443

root/etc/cont-init.d/98-wait-for-db

@@ -0,0 +1,22 @@
+#!/usr/bin/with-contenv sh
+
+# Wait for the DB to be reachable before proceeding. This avoids race condition
+# whereby database is not ready (yet), and so TTRSS config isn't correctly created
+
+#############
+# This simply duplicates the logic from ttrss-configure-db.php
+ename = 'DB';
+eport = 5432;
+
+if [ $DB_TYPE = 'pgsql ];
+then
+	eport = 5432;
+	dbhost = DB_PORT_5432_TCP_ADDR
+else
+	eport = 3306;
+	dbhost = DB_PORT_3306_TCP_ADDR
+fi
+#############
+
+# Run wait-for-it.sh to confirm DB comes up before we proceed
+/srv/wait-for-it.sh $dbhost:$eport

root/srv/wait-for-it.sh

@@ -1,177 +0,0 @@
-#!/usr/bin/env bash
-#   Use this script to test if a given TCP host/port are available
-
-cmdname=$(basename $0)
-
-echoerr() { if [[ $QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
-
-usage()
-{
-    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 1
-}
-
-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 :
-    do
-        if [[ $ISBUSY -eq 1 ]]; then
-            nc -z $HOST $PORT
-            result=$?
-        else
-            (echo > /dev/tcp/$HOST/$PORT) >/dev/null 2>&1
-            result=$?
-        fi
-        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 $BUSYTIMEFLAG $TIMEOUT $0 --quiet --child --host=$HOST --port=$PORT --timeout=$TIMEOUT &
-    else
-        timeout $BUSYTIMEFLAG $TIMEOUT $0 --child --host=$HOST --port=$PORT --timeout=$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
-}
-
-# process arguments
-while [[ $# -gt 0 ]]
-do
-    case "$1" in
-        *:* )
-        hostport=(${1//:/ })
-        HOST=${hostport[0]}
-        PORT=${hostport[1]}
-        shift 1
-        ;;
-        --child)
-        CHILD=1
-        shift 1
-        ;;
-        -q | --quiet)
-        QUIET=1
-        shift 1
-        ;;
-        -s | --strict)
-        STRICT=1
-        shift 1
-        ;;
-        -h)
-        HOST="$2"
-        if [[ $HOST == "" ]]; then break; fi
-        shift 2
-        ;;
-        --host=*)
-        HOST="${1#*=}"
-        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
-        CLI="$@"
-        break
-        ;;
-        --help)
-        usage
-        ;;
-        *)
-        echoerr "Unknown argument: $1"
-        usage
-        ;;
-    esac
-done
-
-if [[ "$HOST" == "" || "$PORT" == "" ]]; then
-    echoerr "Error: you need to provide a host and port to test."
-    usage
-fi
-
-TIMEOUT=${TIMEOUT:-15}
-STRICT=${STRICT:-0}
-CHILD=${CHILD:-0}
-QUIET=${QUIET:-0}
-
-# check to see if timeout is from busybox?
-# check to see if timeout is from busybox?
-TIMEOUT_PATH=$(realpath $(which timeout))
-if [[ $TIMEOUT_PATH =~ "busybox" ]]; then
-        ISBUSY=1
-        BUSYTIMEFLAG="-t"
-else
-        ISBUSY=0
-        BUSYTIMEFLAG=""
-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 [[ $CLI != "" ]]; then
-    if [[ $RESULT -ne 0 && $STRICT -eq 1 ]]; then
-        echoerr "$cmdname: strict mode, refusing to execute subprocess"
-        exit $RESULT
-    fi
-    exec $CLI
-else
-    exit $RESULT
-fi