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postgresql: add backup and restore

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This commit is contained in:
Jörg Thalheim
2024-06-05 18:37:31 +02:00
parent c550261d40
commit 46530a0a9c
6 changed files with 171 additions and 75 deletions
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62
clanModules/localbackup/default.nix
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@@ -6,7 +6,9 @@
}:
let
cfg = config.clan.localbackup;
uniqueFolders = lib.unique (lib.flatten (lib.mapAttrsToList (name: state: state.folders) config.clanCore.state));
uniqueFolders = lib.unique (
lib.flatten (lib.mapAttrsToList (_name: state: state.folders) config.clanCore.state)
);
rsnapshotConfig = target: ''
config_version 1.2
snapshot_root ${target.directory}
@@ -18,19 +20,6 @@ let
cmd_logger ${pkgs.inetutils}/bin/logger
cmd_du ${pkgs.coreutils}/bin/du
cmd_rsnapshot_diff ${pkgs.rsnapshot}/bin/rsnapshot-diff
${lib.optionalString (target.preBackupHook != null) ''
cmd_preexec ${pkgs.writeShellScript "preexec.sh" ''
set -efu -o pipefail
${target.preBackupHook}
# FIXME: we currently fail the backup if the pre-backup command fails
# This is not ideal, but at least most of the time we run backup commands in foreground.
${lib.concatMapStringsSep "\n" (state: ''
echo "Running pre-backup command for ${state.name}"
${state.preBackupCommand}
'') (lib.attrValues config.clanCore.state)}
''}
''}
${lib.optionalString (target.postBackupHook != null) ''
cmd_postexec ${pkgs.writeShellScript "postexec.sh" ''
@@ -40,7 +29,7 @@ let
''}
retain snapshot ${builtins.toString config.clan.localbackup.snapshots}
${lib.concatMapStringsSep "\n" (folder: ''
backup ${folder} ${config.networking.hostName}/
backup ${folder} ${config.networking.hostName}/
'') uniqueFolders}
'';
in
@@ -135,14 +124,30 @@ in
]
}
${lib.concatMapStringsSep "\n" (target: ''
(
${mountHook target}
echo "Creating backup '${target.name}'"
rsnapshot -c "${pkgs.writeText "rsnapshot.conf" (rsnapshotConfig target)}" sync
rsnapshot -c "${pkgs.writeText "rsnapshot.conf" (rsnapshotConfig target)}" snapshot
)
'') (builtins.attrValues cfg.targets)}
'')
${mountHook target}
set -x
echo "Creating backup '${target.name}'"
${lib.optionalString (target.preBackupHook != null) ''
(
${target.preBackupHook}
)
''}
declare -A preCommandErrors
${lib.concatMapStringsSep "\n" (
state:
lib.optionalString (state.preBackupCommand != null) ''
echo "Running pre-backup command for ${state.name}"
if ! ( ${state.preBackupCommand} ) then
preCommandErrors["${state.name}"]=1
fi
''
) (builtins.attrValues config.clanCore.state)}
rsnapshot -c "${pkgs.writeText "rsnapshot.conf" (rsnapshotConfig target)}" sync
rsnapshot -c "${pkgs.writeText "rsnapshot.conf" (rsnapshotConfig target)}" snapshot
'') (builtins.attrValues cfg.targets)}'')
(pkgs.writeShellScriptBin "localbackup-list" ''
set -efu -o pipefail
export PATH=${
@@ -173,6 +178,14 @@ in
pkgs.gawk
]
}
if [[ "''${NAME:-}" == "" ]]; then
echo "No backup name given via NAME environment variable"
exit 1
fi
if [[ "''${FOLDERS:-}" == "" ]]; then
echo "No folders given via FOLDERS environment variable"
exit 1
fi
name=$(awk -F'::' '{print $1}' <<< $NAME)
backupname=''${NAME#$name::}
@@ -188,8 +201,9 @@ in
exit 1
fi
IFS=';' read -ra FOLDER <<< "$FOLDERS"
IFS=':' read -ra FOLDER <<< "''$FOLDERS"
for folder in "''${FOLDER[@]}"; do
mkdir -p "$folder"
rsync -a "$backupname/${config.networking.hostName}$folder/" "$folder"
done
'')