api2/cluster: add 'metricserver' api endpoints

modeled after our typical api endpoints for sectionschema configs

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

PVE/API2/Cluster.pm

@@ -25,6 +25,7 @@ use PVE::API2::ACMEPlugin;
 use PVE::API2::Backup;
 use PVE::API2::BackupInfo;
 use PVE::API2::Cluster::Ceph;
+use PVE::API2::Cluster::MetricServerConfig;
 use PVE::API2::ClusterConfig;
 use PVE::API2::Firewall::Cluster;
 use PVE::API2::HAConfig;
@@ -43,6 +44,11 @@ __PACKAGE__->register_method ({
     path => 'replication',
 });
 
+__PACKAGE__->register_method ({
+    subclass => "PVE::API2::Cluster::MetricServerConfig",
+    path => 'metricserver',
+});
+
 __PACKAGE__->register_method ({
     subclass => "PVE::API2::ClusterConfig",
     path => 'config',
@@ -132,6 +138,7 @@ __PACKAGE__->register_method ({
 	    { name => 'config' },
 	    { name => 'acme' },
 	    { name => 'ceph' },
+	    { name => 'metricserver' },
 	    ];
 
 	if ($have_sdn) {

PVE/API2/Cluster/Makefile

@@ -3,6 +3,7 @@ include ../../../defines.mk
 # for node independent, cluster-wide applicable, API endpoints
 # ensure we do not conflict with files shipped by pve-cluster!!
 PERLSOURCE= 			\
+	MetricServerConfig.pm	\
 	Ceph.pm
 
 all:

PVE/API2/Cluster/MetricServerConfig.pm

@@ -0,0 +1,228 @@
+package PVE::API2::Cluster::MetricServerConfig;
+
+use warnings;
+use strict;
+
+use PVE::Tools qw(extract_param);
+use PVE::Exception qw(raise_perm_exc raise_param_exc);
+use PVE::JSONSchema qw(get_standard_option);
+use PVE::RPCEnvironment;
+use PVE::ExtMetric;
+
+use PVE::RESTHandler;
+
+use base qw(PVE::RESTHandler);
+
+__PACKAGE__->register_method ({
+    name => 'index',
+    path => '',
+    method => 'GET',
+    description => "List configured metric servers.",
+    permissions => {
+	check => ['perm', '/', ['Sys.Audit']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {},
+    },
+    returns => {
+	type => 'array',
+	items => {
+	    type => "object",
+	    properties => {
+		id => {
+		    description => "The ID of the entry.",
+		    type => 'string'
+		},
+		disable => {
+		    description => "Flag to disable the plugin.",
+		    type => 'boolean',
+		},
+		type => {
+		    description => "Plugin type.",
+		    type => 'string',
+		},
+		server => {
+		    description => "Server dns name or IP address",
+		    type => 'string',
+		},
+		port => {
+		    description => "Server network port",
+		    type => 'integer',
+		},
+	    },
+	},
+	links => [ { rel => 'child', href => "{id}" } ],
+    },
+    code => sub {
+	my ($param) = @_;
+
+	my $res = [];
+	my $status_cfg = PVE::Cluster::cfs_read_file('status.cfg');
+
+	for my $id (sort keys %{$status_cfg->{ids}}) {
+	    my $plugin_config = $status_cfg->{ids}->{$id};
+	    push @$res, {
+		id => $id,
+		disable => $plugin_config->{disable} // 0,
+		type => $plugin_config->{type},
+		server => $plugin_config->{server},
+		port => $plugin_config->{port},
+	    };
+	}
+
+	return $res;
+    }});
+
+__PACKAGE__->register_method ({
+    name => 'read',
+    path => '{id}',
+    method => 'GET',
+    description => "Read metric server configuration.",
+    permissions => {
+	check => ['perm', '/', ['Sys.Audit']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    id => {
+		type => 'string',
+		format => 'pve-configid',
+	    },
+	},
+    },
+    returns => { type => 'object' },
+    code => sub {
+	my ($param) = @_;
+
+	my $status_cfg = PVE::Cluster::cfs_read_file('status.cfg');
+	my $id = $param->{id};
+
+	if (!defined($status_cfg->{ids}->{$id})) {
+	    die "status server entry '$id' does not exist\n";
+	}
+
+	return $status_cfg->{ids}->{$id};
+    }});
+
+__PACKAGE__->register_method ({
+    name => 'create',
+    path => '',
+    protected => 1,
+    method => 'POST',
+    description => "Create a new external metric server config",
+    permissions => {
+	check => ['perm', '/', ['Sys.Modify']],
+    },
+    parameters => PVE::Status::Plugin->createSchema(),
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $type = extract_param($param, 'type');
+	my $plugin = PVE::Status::Plugin->lookup($type);
+	my $id = extract_param($param, 'id');
+
+	PVE::Cluster::cfs_lock_file('status.cfg', undef, sub {
+	    my $cfg = PVE::Cluster::cfs_read_file('status.cfg');
+
+	    die "Metric server '$id' already exists\n"
+		if $cfg->{ids}->{$id};
+
+	    my $opts = $plugin->check_config($id, $param, 1, 1);
+	    $cfg->{ids}->{$id} = $opts;
+
+	    PVE::Cluster::cfs_write_file('status.cfg', $cfg);
+	});
+	die $@ if $@;
+
+	return;
+    }});
+
+
+__PACKAGE__->register_method ({
+    name => 'update',
+    protected => 1,
+    path => '{id}',
+    method => 'PUT',
+    description => "Update metric server configuration.",
+    permissions => {
+	check => ['perm', '/', ['Sys.Modify']],
+    },
+    parameters => PVE::Status::Plugin->updateSchema(),
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $id = extract_param($param, 'id');
+	my $digest = extract_param($param, 'digest');
+	my $delete = extract_param($param, 'delete');
+
+	PVE::Cluster::cfs_lock_file('status.cfg', undef, sub {
+	    my $cfg = PVE::Cluster::cfs_read_file('status.cfg');
+
+	    PVE::SectionConfig::assert_if_modified($cfg, $digest);
+
+	    my $data = $cfg->{ids}->{$id};
+	    die "no such server '$id'\n" if !$data;
+
+	    my $plugin = PVE::Status::Plugin->lookup($data->{type});
+	    my $opts = $plugin->check_config($id, $param, 0, 1);
+
+	    for my $k (keys %$opts) {
+		$data->{$k} = $opts->{$k};
+	    }
+
+	    if ($delete) {
+		my $options = $plugin->private()->{options}->{$data->{type}};
+		for my $k (PVE::Tools::split_list($delete)) {
+		    my $d = $options->{$k} || die "no such option '$k'\n";
+		    die "unable to delete required option '$k'\n" if !$d->{optional};
+		    die "unable to delete fixed option '$k'\n" if $d->{fixed};
+
+		    delete $data->{$k};
+		}
+	    }
+
+	    PVE::Cluster::cfs_write_file('status.cfg', $cfg);
+	});
+	die $@ if $@;
+
+	return;
+    }});
+
+__PACKAGE__->register_method ({
+    name => 'delete',
+    protected => 1,
+    path => '{id}',
+    method => 'DELETE',
+    description => "Remove Metric server.",
+    permissions => {
+	check => ['perm', '/', ['Sys.Modify']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    id => {
+		type => 'string',
+		format => 'pve-configid',
+	    },
+	}
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	PVE::Cluster::cfs_lock_file('status.cfg', undef, sub {
+	    my $cfg = PVE::Cluster::cfs_read_file('status.cfg');
+
+	    my $id = $param->{id};
+	    delete $cfg->{ids}->{$id};
+	    PVE::Cluster::cfs_write_file('status.cfg', $cfg);
+	});
+	die $@ if $@;
+
+	return;
+    }});
+
+1;