From e4f07e3baf3f724e624e7e75877e6c3e459420c0 Mon Sep 17 00:00:00 2001
From: Gilles Filippini <pini@pini.fr>
Date: Fri, 7 May 2021 13:03:41 +0200
Subject: [PATCH] [fix] docker: entrypoint - backup conf.json
When `/etc/duniter` is not mounted as a persistent volume, the
configuration file is lost after re-creating the instance.
To prevent this, before transitionning the configuration file from
volume '/var/lib/duniter' to volume '/etc/duniter', the entrypoint
backups it into '/var/lib/duniter'. On restart, if the entrypoint
detects that the link to '/etc/duniter/conf.json' is dangling, it
prints a big fat warning into the logs and re-use the backuped
config file.
---
release/docker/docker-entrypoint.sh | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/release/docker/docker-entrypoint.sh b/release/docker/docker-entrypoint.sh
index 2880aca11..db959ccc0 100755
--- a/release/docker/docker-entrypoint.sh
+++ b/release/docker/docker-entrypoint.sh
@@ -4,6 +4,7 @@ set -u
function boolean () {
echo "$1" | sed -E 's/^(true|yes|1)$/true/i'
}
+big_fat_warning='\033[01;31m**WARNING**:\033[0m'
DEBUG_ENTRYPOINT="$(boolean "${DEBUG_ENTRYPOINT:-false}")"
if [ "$DEBUG_ENTRYPOINT" = true ]; then
@@ -17,9 +18,24 @@ home_default=$home/duniter_default
manual_config="$(boolean "${DUNITER_MANUAL_CONFIG:-false}")"
auto_sync="$(boolean "${DUNITER_AUTO_SYNC:-false}")"
-# Use path /etc/duniter/conf.json
-if ! [ -f "$config/conf.json" ] && [ -f "$home_default/conf.json" ]; then
- mv "$home_default/conf.json" "$config/conf.json"
+# Use new path /etc/duniter/conf.json
+if ! [ -f "$config/conf.json" ]; then
+ if [ "$(readlink "$home_default/conf.json")" = "$config/conf.json" ]; then
+ # The configuration file was moved already but the link is dangling
+ # It is likely that '/etc/duniter' is an anonymous volume
+ echo -e "$big_fat_warning Your configuration file didn't survive the restart!"
+ echo -e "$big_fat_warning Make sure that '/etc/duniter' is explicitely mounted as a persistent volume or you'll lose it again."
+ if [ -f "$home_default/conf.json.backup" ]; then
+ echo -e "$big_fat_warning Found backup file '$home_default/conf.json.backup'; using it..."
+ mv "$home_default/conf.json.backup" "$home_default/conf.json"
+ fi
+ fi
+ if [ -f "$home_default/conf.json" ]; then
+ echo "Moving existing configuration file '$home_default/conf.json' to its new location: '$config/conf.json'"
+ echo "A backup is kept at '$home_default/conf.json.backup'"
+ cp "$home_default/conf.json" "$home_default/conf.json.backup"
+ mv "$home_default/conf.json" "$config/conf.json"
+ fi
fi
mkdir -p "$home/duniter_default"
ln -fs "$config/conf.json" "$home_default/conf.json"
--
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