From 4a06e02be66847b380f26c41fdfcd4f737c6dc80 Mon Sep 17 00:00:00 2001
From: qgarnier <qgarnier@centreon.com>
Date: Thu, 14 Dec 2017 13:37:47 +0100
Subject: [PATCH] add cloudwatch list metrics mode

---
 cloud/aws/custom/awscli.pm              |  32 ++++++
 cloud/aws/custom/paws.pm                |  33 ++++++
 cloud/aws/mode/cloudwatchlistmetrics.pm | 127 ++++++++++++++++++++++++
 3 files changed, 192 insertions(+)
 create mode 100644 cloud/aws/mode/cloudwatchlistmetrics.pm

diff --git a/cloud/aws/custom/awscli.pm b/cloud/aws/custom/awscli.pm
index 45e4b6fec..b56b4115e 100644
--- a/cloud/aws/custom/awscli.pm
+++ b/cloud/aws/custom/awscli.pm
@@ -205,6 +205,38 @@ sub cloudwatch_get_alarms {
     return $alarm_results;
 }
 
+sub cloudwatch_list_metrics_set_cmd {
+    my ($self, %options) = @_;
+    
+    return if (defined($self->{option_results}->{command_options}) && $self->{option_results}->{command_options} ne '');
+    my $cmd_options = "cloudwatch list-metrics --region $options{region} --output json";
+    return $cmd_options; 
+}
+
+sub cloudwatch_list_metrics {
+    my ($self, %options) = @_;
+    
+    my $cmd_options = $self->cloudwatch_list_metrics_set_cmd(%options);
+    my ($response) = centreon::plugins::misc::execute(
+            output => $self->{output},
+            options => $self->{option_results},
+            sudo => $self->{option_results}->{sudo},
+            command => $self->{option_results}->{command},
+            command_path => $self->{option_results}->{command_path},
+            command_options => $cmd_options
+    );
+    my $list_metrics;
+    eval {
+        $list_metrics = JSON::XS->new->utf8->decode($response);
+    };
+    if ($@) {
+        $self->{output}->add_option_msg(short_msg => "Cannot decode json response: $@");
+        $self->{output}->option_exit();
+    }
+    
+    return $list_metrics->{Metrics};
+}
+
 1;
 
 __END__
diff --git a/cloud/aws/custom/paws.pm b/cloud/aws/custom/paws.pm
index e5d3da182..b93e4d2c3 100644
--- a/cloud/aws/custom/paws.pm
+++ b/cloud/aws/custom/paws.pm
@@ -170,6 +170,39 @@ sub cloudwatch_get_alarms {
     return $alarm_results;
 }
 
+sub cloudwatch_list_metrics {
+    my ($self, %options) = @_;
+    
+    my $metric_results = [];
+    eval {
+        my $cw = Paws->service('CloudWatch', region => $options{region});
+        my %options = ();
+        $options{Namespace} = $options{namespace} if (defined($options{namespace}));
+        while ((my $list_metrics = $cw->ListMetrics(%options))) {
+            foreach (@{$list_metrics->{Metrics}}) {
+                my $dimensions = [];
+                foreach my $dimension (@{$_->{Dimensions}}) {
+                    push @$dimensions, { Name => $dimension->{Name}, Value => $dimension->{Value} };
+                }
+                push @{$metric_results}, { 
+                    Namespace => $_->{Namespace},
+                    MetricName => $_->{MetricName},
+                    Dimensions => $dimensions,
+                };
+            }
+            
+            last if (!defined($list_metrics->{NextToken}));
+            $options{NextToken} = $list_metrics->{NextToken};
+        }
+    };
+    if ($@) {
+        $self->{output}->add_option_msg(short_msg => "error: $@");
+        $self->{output}->option_exit();
+    }
+    
+    return $metric_results;
+}
+
 1;
 
 __END__
diff --git a/cloud/aws/mode/cloudwatchlistmetrics.pm b/cloud/aws/mode/cloudwatchlistmetrics.pm
new file mode 100644
index 000000000..b76d37802
--- /dev/null
+++ b/cloud/aws/mode/cloudwatchlistmetrics.pm
@@ -0,0 +1,127 @@
+#
+# Copyright 2017 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package cloud::aws::mode::cloudwatchlistmetrics;
+
+use base qw(centreon::plugins::mode);
+
+use strict;
+use warnings;
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+    
+    $self->{version} = '1.0';
+    $options{options}->add_options(arguments =>
+                                {
+                                "region:s"      => { name => 'region' },
+                                "namespace:s"   => { name => 'namespace' },
+                                });
+
+    return $self;
+}
+
+sub check_options {
+    my ($self, %options) = @_;
+    $self->SUPER::init(%options);
+    
+    if (!defined($self->{option_results}->{region}) || $self->{option_results}->{region} eq '') {
+        $self->{output}->add_option_msg(short_msg => "Need to specify --region option.");
+        $self->{output}->option_exit();
+    }
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    $self->{metrics} = $options{custom}->cloudwatch_list_metrics(region => $self->{option_results}->{region}, namespace => $self->{option_results}->{namespace});
+}
+
+sub get_dimensions_str {
+    my ($self, %options) = @_;
+    
+    my $dimensions = '';
+    my $append = '';
+    foreach (@{$options{dimensions}}) {
+        $dimensions .= $append . "Name=$_->{Name},Value=$_->{Value}";
+        $append = ',';
+    }
+    
+    return $dimensions;
+}
+
+sub run {
+    my ($self, %options) = @_;
+
+    $self->manage_selection(%options);
+    foreach (@{$self->{metrics}}) {
+        $self->{output}->output_add(long_msg => sprintf("[Namespace = %s][Dimensions = %s][Metric = %s]",
+            $_->{Namespace}, $self->get_dimensions_str(dimensions => $_->{Dimensions}), $_->{MetricName}));
+    }
+    
+    $self->{output}->output_add(severity => 'OK',
+                                short_msg => 'List metrics:');
+    $self->{output}->display(nolabel => 1, force_ignore_perfdata => 1, force_long_output => 1);
+    $self->{output}->exit();
+}
+
+sub disco_format {
+    my ($self, %options) = @_;
+    
+    $self->{output}->add_disco_format(elements => ['namespace', 'metric', 'dimensions']);
+}
+
+sub disco_show {
+    my ($self, %options) = @_;
+
+    $self->manage_selection(%options);
+    foreach (@{$self->{metrics}}) {
+        $self->{output}->add_disco_entry(
+            namespace => $_->{Namespace},
+            metric => $_->{MetricName},
+            dimensions => $self->get_dimensions_str(dimensions => $_->{Dimensions}),
+        );
+    }
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+List cloudwatch metrics.
+
+=over 8
+
+=item B<--region>
+
+Set the region name (Required).
+
+=item B<--namespace>
+
+Set cloudwatch namespace.
+
+=back
+
+=cut
+