[pmg-devel] [PATCH pve-common v2 1/1] add PBSClient module
Stoiko Ivanov
s.ivanov at proxmox.com
Mon Nov 2 19:45:28 CET 2020
PBSClient.pm contains methods for:
* handling (sensitive) config-information (passwords, encryption keys)
* creating/restoring/forgetting/listing backups
code is mostly based on the current PBSPlugin in pve-storage
Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
---
src/Makefile | 1 +
src/PVE/PBSClient.pm | 305 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 306 insertions(+)
create mode 100644 src/PVE/PBSClient.pm
diff --git a/src/Makefile b/src/Makefile
index 1987d0e..727019a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,6 +20,7 @@ LIB_SOURCES = \
LDAP.pm \
Network.pm \
OTP.pm \
+ PBSClient.pm \
PTY.pm \
ProcFSTools.pm \
RESTEnvironment.pm \
diff --git a/src/PVE/PBSClient.pm b/src/PVE/PBSClient.pm
new file mode 100644
index 0000000..1d9a9f4
--- /dev/null
+++ b/src/PVE/PBSClient.pm
@@ -0,0 +1,305 @@
+package PVE::PBSClient;
+
+# utility functions for interaction with Proxmox Backup Server
+
+use strict;
+use warnings;
+use Fcntl qw(F_GETFD F_SETFD FD_CLOEXEC);
+use IO::File;
+use JSON;
+use POSIX qw(strftime ENOENT);
+
+use PVE::Tools qw(run_command file_set_contents file_get_contents file_read_firstline);
+use PVE::JSONSchema qw(get_standard_option);
+
+sub new {
+ my ($class, $scfg, $storeid, $sdir) = @_;
+
+ die "no section config provided\n" if ref($scfg) eq '';
+ die "undefined store id\n" if !defined($storeid);
+
+ my $secret_dir = $sdir // '/etc/pve/priv/storage';
+
+ my $self = bless { scfg => $scfg, storeid => $storeid, secret_dir => $secret_dir }, $class;
+}
+
+my sub password_file_name {
+ my ($self) = @_;
+
+ return "$self->{secret_dir}/$self->{storeid}.pw";
+}
+
+sub set_password {
+ my ($self, $password) = @_;
+
+ my $pwfile = password_file_name($self);
+ mkdir $self->{secret_dir};
+
+ PVE::Tools::file_set_contents($pwfile, "$password\n", 0600);
+};
+
+sub delete_password {
+ my ($self) = @_;
+
+ my $pwfile = password_file_name($self);
+
+ unlink $pwfile;
+};
+
+sub get_password {
+ my ($self) = @_;
+
+ my $pwfile = password_file_name($self);
+
+ return PVE::Tools::file_read_firstline($pwfile);
+}
+
+sub encryption_key_file_name {
+ my ($self) = @_;
+
+ return "$self->{secret_dir}/$self->{storeid}.enc";
+};
+
+sub set_encryption_key {
+ my ($self, $key) = @_;
+
+ my $encfile = encryption_key_file_name($self);
+ mkdir $self->{secret_dir};
+
+ PVE::Tools::file_set_contents($encfile, "$key\n", 0600);
+};
+
+sub delete_encryption_key {
+ my ($self) = @_;
+
+ my $encfile = encryption_key_file_name($self);
+
+ if (!unlink $encfile) {
+ return if $! == ENOENT;
+ die "failed to delete encryption key! $!\n";
+ }
+};
+
+# Returns a file handle if there is an encryption key, or `undef` if there is not. Dies on error.
+my sub open_encryption_key {
+ my ($self) = @_;
+
+ my $encryption_key_file = encryption_key_file_name($self);
+
+ my $keyfd;
+ if (!open($keyfd, '<', $encryption_key_file)) {
+ return undef if $! == ENOENT;
+ die "failed to open encryption key: $encryption_key_file: $!\n";
+ }
+
+ return $keyfd;
+}
+
+my $USE_CRYPT_PARAMS = {
+ backup => 1,
+ restore => 1,
+ 'upload-log' => 1,
+};
+
+my sub do_raw_client_cmd {
+ my ($self, $client_cmd, $param, %opts) = @_;
+
+ my $use_crypto = $USE_CRYPT_PARAMS->{$client_cmd};
+
+ my $client_exe = '/usr/bin/proxmox-backup-client';
+ die "executable not found '$client_exe'! Proxmox backup client not installed?\n"
+ if ! -x $client_exe;
+
+ my $scfg = $self->{scfg};
+ my $server = $scfg->{server};
+ my $datastore = $scfg->{datastore};
+ my $username = $scfg->{username} // 'root at pam';
+
+ my $userns_cmd = delete $opts{userns_cmd};
+
+ my $cmd = [];
+
+ push @$cmd, @$userns_cmd if defined($userns_cmd);
+
+ push @$cmd, $client_exe, $client_cmd;
+
+ # This must live in the top scope to not get closed before the `run_command`
+ my $keyfd;
+ if ($use_crypto) {
+ if (defined($keyfd = open_encryption_key($self))) {
+ my $flags = fcntl($keyfd, F_GETFD, 0)
+ // die "failed to get file descriptor flags: $!\n";
+ fcntl($keyfd, F_SETFD, $flags & ~FD_CLOEXEC)
+ or die "failed to remove FD_CLOEXEC from encryption key file descriptor\n";
+ push @$cmd, '--crypt-mode=encrypt', '--keyfd='.fileno($keyfd);
+ } else {
+ push @$cmd, '--crypt-mode=none';
+ }
+ }
+
+ push @$cmd, @$param if defined($param);
+
+ push @$cmd, "--repository", "$username\@$server:$datastore";
+
+ local $ENV{PBS_PASSWORD} = get_password($self);
+
+ local $ENV{PBS_FINGERPRINT} = $scfg->{fingerprint};
+
+ # no ascii-art on task logs
+ local $ENV{PROXMOX_OUTPUT_NO_BORDER} = 1;
+ local $ENV{PROXMOX_OUTPUT_NO_HEADER} = 1;
+
+ if (my $logfunc = $opts{logfunc}) {
+ $logfunc->("run: " . join(' ', @$cmd));
+ }
+
+ run_command($cmd, %opts);
+}
+
+my sub run_raw_client_cmd {
+ my ($self, $client_cmd, $param, %opts) = @_;
+ return do_raw_client_cmd($self, $client_cmd, $param, %opts);
+}
+
+my sub run_client_cmd {
+ my ($self, $client_cmd, $param, $no_output) = @_;
+
+ my $json_str = '';
+ my $outfunc = sub { $json_str .= "$_[0]\n" };
+
+ $param = [] if !defined($param);
+ $param = [ $param ] if !ref($param);
+
+ $param = [@$param, '--output-format=json'] if !$no_output;
+
+ do_raw_client_cmd($self, $client_cmd, $param,
+ outfunc => $outfunc, errmsg => 'proxmox-backup-client failed');
+
+ return undef if $no_output;
+
+ my $res = decode_json($json_str);
+
+ return $res;
+}
+
+sub autogen_encryption_key {
+ my ($self) = @_;
+ my $encfile = encryption_key_file_name($self);
+ run_command(['proxmox-backup-client', 'key', 'create', '--kdf', 'none', $encfile]);
+};
+
+sub get_snapshots {
+ my ($self, $opts) = @_;
+
+ my $param = [];
+ if (defined($opts->{group})) {
+ push @$param, $opts->{group};
+ }
+
+ return run_client_cmd($self, "snapshots", $param);
+};
+
+sub backup_tree {
+ my ($self, $opts) = @_;
+
+ my $type = delete $opts->{type};
+ die "backup-type not provided\n" if !defined($type);
+ my $id = delete $opts->{id};
+ die "backup-id not provided\n" if !defined($id);
+ my $root = delete $opts->{root};
+ die "root dir not provided\n" if !defined($root);
+ my $pxarname = delete $opts->{pxarname};
+ die "archive name not provided\n" if !defined($pxarname);
+ my $time = delete $opts->{time};
+
+ my $param = [];
+
+ push @$param, "$pxarname.pxar:$root";
+ push @$param, '--backup-type', $type;
+ push @$param, '--backup-id', $id;
+ push @$param, '--backup-time', $time if defined($time);
+
+ return run_raw_client_cmd($self, 'backup', $param, %$opts);
+};
+
+sub restore_pxar {
+ my ($self, $opts) = @_;
+
+ my $snapshot = delete $opts->{snapshot};
+ die "snapshot not provided\n" if !defined($snapshot);
+ my $pxarname = delete $opts->{pxarname};
+ die "archive name not provided\n" if !defined($pxarname);
+ my $target = delete $opts->{target};
+ die "restore-target not provided\n" if !defined($target);
+ #my $time = delete $opts->{time};
+
+ my $param = [];
+
+ push @$param, "$snapshot";
+ push @$param, "$pxarname.pxar";
+ push @$param, "$target";
+ push @$param, "--allow-existing-dirs", 0;
+
+ return run_raw_client_cmd($self, 'restore', $param, %$opts);
+};
+
+sub forget_snapshot {
+ my ($self, $snapshot) = @_;
+
+ die "snapshot not provided\n" if !defined($snapshot);
+
+ my $param = [];
+
+ push @$param, "$snapshot";
+
+ return run_raw_client_cmd($self, 'forget', $param);
+};
+
+sub prune_group {
+ my ($self, $opts, $prune_opts, $group) = @_;
+
+ die "group not provided\n" if !defined($group);
+
+ # do nothing if no keep options specified for remote
+ return [] if scalar(keys %$prune_opts) == 0;
+
+ my $param = [];
+
+ push @$param, "--quiet";
+
+ if (defined($opts->{'dry-run'}) && $opts->{'dry-run'}) {
+ push @$param, "--dry-run", $opts->{'dry-run'};
+ }
+
+ foreach my $keep_opt (keys %$prune_opts) {
+ push @$param, "--$keep_opt", $prune_opts->{$keep_opt};
+ }
+ push @$param, "$group";
+
+ return run_client_cmd($self, 'prune', $param);
+};
+
+sub status {
+ my ($self) = @_;
+
+ my $total = 0;
+ my $free = 0;
+ my $used = 0;
+ my $active = 0;
+
+ eval {
+ my $res = run_client_cmd($self, "status");
+
+ $active = 1;
+ $total = $res->{total};
+ $used = $res->{used};
+ $free = $res->{avail};
+ };
+ if (my $err = $@) {
+ warn $err;
+ }
+
+ return ($total, $free, $used, $active);
+};
+
+1;
--
2.20.1
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