dotfiles/modules/nixos/services/calibre.nix

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# Calibre-web is an E-Book library and management tool.
# - Exposed to the public via Caddy.
# - Hostname defined with config.hostnames.books
# - File directory backed up to S3 on a cron schedule.
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{
config,
pkgs,
lib,
...
}:
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let
libraryPath = "/data/books";
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in
{
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options = {
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backups.calibre = lib.mkOption {
type = lib.types.bool;
description = "Whether to backup Calibre library";
default = true;
};
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};
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config = lib.mkIf config.services.calibre-web.enable {
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services.calibre-web = {
openFirewall = true;
options = {
reverseProxyAuth.enable = false;
enableBookConversion = true;
enableBookUploading = true;
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calibreLibrary = libraryPath;
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};
};
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# Allow web traffic to Caddy
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caddy.routes = [
{
match = [ { host = [ config.hostnames.books ]; } ];
handle = [
{
handler = "reverse_proxy";
upstreams = [
{ dial = "localhost:${builtins.toString config.services.calibre-web.listen.port}"; }
];
# This is required when calibre-web is behind a reverse proxy
# https://github.com/janeczku/calibre-web/issues/19
headers.request.add."X-Script-Name" = [ "/calibre-web" ];
}
];
}
];
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# Configure Cloudflare DNS to point to this machine
services.cloudflare-dyndns.domains = [ config.hostnames.books ];
# Grant user access to Calibre directories
users.users.${config.user}.extraGroups = [ "calibre-web" ];
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# Run a backup on a schedule
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systemd.timers.calibre-backup = lib.mkIf config.backups.calibre {
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timerConfig = {
OnCalendar = "*-*-* 00:00:00"; # Once per day
Unit = "calibre-backup.service";
};
wantedBy = [ "timers.target" ];
};
# Backup Calibre data to object storage
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systemd.services.calibre-backup = lib.mkIf config.backups.calibre {
description = "Backup Calibre data";
environment.AWS_ACCESS_KEY_ID = config.backup.s3.accessKeyId;
serviceConfig = {
Type = "oneshot";
User = "calibre-web";
Group = "backup";
EnvironmentFile = config.secrets.backup.dest;
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};
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script = ''
${pkgs.awscli2}/bin/aws s3 sync \
${libraryPath}/ \
s3://${config.backup.s3.bucket}/calibre/ \
--endpoint-url=https://${config.backup.s3.endpoint}
'';
};
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};
}