From d2c6362a59acbce154b35c957c1e9de7e688e474 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Mon, 13 Sep 2021 04:54:59 -0400
Subject: [PATCH] fix: start linked datastores when an app is started or
 restored

This won't _also_ fix issues when an app is deployed as there isn't an exposed hook for it, but it should fix many other issues.

For the app deployment problem, we'll need a new hook upstream.

Refs dokku/dokku-redis#138
---
 pre-restore | 36 ++++++++++++++++++++++++++++++++++++
 pre-start   | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100755 pre-restore
 create mode 100755 pre-start

diff --git a/pre-restore b/pre-restore
new file mode 100755
index 0000000..a03ad3c
--- /dev/null
+++ b/pre-restore
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common-functions"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/functions"
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+
+plugin-pre-restore() {
+  declare SCHEDULER="$1" APP="$2"
+
+  if [[ "$SCHEDULER" != "docker-local" ]]; then
+    return
+  fi
+
+  local SERVICES=$(ls "$PLUGIN_DATA_ROOT" 2>/dev/null)
+  for SERVICE in $SERVICES; do
+    if ! in_links_file "$SERVICE" "$APP"; then
+      continue
+    fi
+
+    local status="$(service_status "$SERVICE")"
+    if [[ "$status" == "running" ]]; then
+      continue
+    fi
+
+    if [[ "$status" == "restarting" ]]; then
+      dokku_log_warn "$PLUGIN_SERVICE service $SERVICE is restarting and may cause issues with linked app $APP"
+      continue
+    fi
+
+    dokku_log_warn "$PLUGIN_SERVICE service $SERVICE is not running, issuing service start"
+    service_start "$SERVICE"
+  done
+}
+
+plugin-pre-restore "$@"
diff --git a/pre-start b/pre-start
new file mode 100755
index 0000000..672de9c
--- /dev/null
+++ b/pre-start
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common-functions"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/functions"
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+
+plugin-pre-start() {
+  declare APP="$1"
+
+  local SERVICES=$(ls "$PLUGIN_DATA_ROOT" 2>/dev/null)
+  for SERVICE in $SERVICES; do
+    if ! in_links_file "$SERVICE" "$APP"; then
+      continue
+    fi
+
+    local status="$(service_status "$SERVICE")"
+    if [[ "$status" == "running" ]]; then
+      continue
+    fi
+
+    if [[ "$status" == "restarting" ]]; then
+      dokku_log_warn "$PLUGIN_SERVICE service $SERVICE is restarting and may cause issues with linked app $APP"
+      continue
+    fi
+
+    dokku_log_warn "$PLUGIN_SERVICE service $SERVICE is not running, issuing service start"
+    service_start "$SERVICE"
+  done
+}
+
+plugin-pre-start "$@"