From d474dd2ca4bbcf9930ed3d02b3200eb323ddb1e5 Mon Sep 17 00:00:00 2001
From: qgarnier <garnier.quentin@gmail.com>
Date: Thu, 30 Dec 2021 14:12:09 +0100
Subject: [PATCH] add(plugin): redis sentinel (#3352)

---
 apps/redis/sentinel/custom/cli.pm            | 251 ++++++++++++++++++
 apps/redis/sentinel/mode/listclusters.pm     |  96 +++++++
 apps/redis/sentinel/mode/redisclusters.pm    | 263 +++++++++++++++++++
 apps/redis/sentinel/mode/sentinelclusters.pm | 256 ++++++++++++++++++
 apps/redis/sentinel/plugin.pm                |  50 ++++
 database/redis/plugin.pm                     |   2 +
 6 files changed, 918 insertions(+)
 create mode 100644 apps/redis/sentinel/custom/cli.pm
 create mode 100644 apps/redis/sentinel/mode/listclusters.pm
 create mode 100644 apps/redis/sentinel/mode/redisclusters.pm
 create mode 100644 apps/redis/sentinel/mode/sentinelclusters.pm
 create mode 100644 apps/redis/sentinel/plugin.pm

diff --git a/apps/redis/sentinel/custom/cli.pm b/apps/redis/sentinel/custom/cli.pm
new file mode 100644
index 000000000..4ba127d61
--- /dev/null
+++ b/apps/redis/sentinel/custom/cli.pm
@@ -0,0 +1,251 @@
+#
+# Copyright 2021 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 apps::redis::sentinel::custom::cli;
+
+use strict;
+use warnings;
+use centreon::plugins::ssh;
+use centreon::plugins::misc;
+use Digest::MD5 qw(md5_hex);
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = {};
+    bless $self, $class;
+
+    if (!defined($options{output})) {
+        print "Class Custom: Need to specify 'output' argument.\n";
+        exit 3;
+    }
+    if (!defined($options{options})) {
+        $options{output}->add_option_msg(short_msg => "Class Custom: Need to specify 'options' argument.");
+        $options{output}->option_exit();
+    }
+
+    if (!defined($options{noptions})) {
+        $options{options}->add_options(arguments => {
+            'ssh-hostname:s'  => { name => 'ssh_hostname' },                
+            'server:s'        => { name => 'server' },
+            'port:s'          => { name => 'port' },
+            'username:s'      => { name => 'username' },
+            'password:s'      => { name => 'password' },
+            'tls'             => { name => 'tls' },
+            'cacert:s'        => { name => 'cacert' },
+            'insecure'        => { name => 'insecure' },
+            'timeout:s'       => { name => 'timeout' }
+        });
+    }
+
+    $options{options}->add_help(package => __PACKAGE__, sections => 'REDIS SENTINEL OPTIONS', once => 1);
+
+    $self->{output} = $options{output};
+    $self->{ssh} = centreon::plugins::ssh->new(%options);
+
+    return $self;
+}
+
+sub set_options {
+    my ($self, %options) = @_;
+
+    $self->{option_results} = $options{option_results};
+}
+
+sub set_defaults {}
+
+sub check_options {
+    my ($self, %options) = @_;
+
+    $self->{ssh_hostname} = defined($self->{option_results}->{ssh_hostname}) && $self->{option_results}->{ssh_hostname} ne '' ? $self->{option_results}->{ssh_hostname} : '';
+    $self->{server} = defined($self->{option_results}->{server}) && $self->{option_results}->{server} ne '' ? $self->{option_results}->{server} : '';
+    $self->{port} = defined($self->{option_results}->{port}) && $self->{option_results}->{port} ne '' ? $self->{option_results}->{port} : 26379;
+    $self->{username} = defined($self->{option_results}->{password}) && $self->{option_results}->{username} ne '' ? $self->{option_results}->{username} : '';
+    $self->{password} = defined($self->{option_results}->{password}) && $self->{option_results}->{password} ne '' ? $self->{option_results}->{password} : '';
+    $self->{timeout} = defined($self->{option_results}->{timeout}) && $self->{option_results}->{timeout} =~ /(\d+)/ ? $1 : 10;
+    $self->{tls} = defined($self->{option_results}->{tls}) ? 1 : 0;
+    $self->{insecure} = defined($self->{option_results}->{insecure}) ? 1 : 0;
+    $self->{cacert} = defined($self->{option_results}->{cacert}) && $self->{option_results}->{cacert} ne '' ? $self->{option_results}->{cacert} : '';
+
+    if ($self->{server} eq '') {
+        $self->{output}->add_option_msg(short_msg => 'Need to specify --server option.');
+        $self->{output}->option_exit();
+    }
+    if ($self->{ssh_hostname} ne '') {
+        $self->{option_results}->{hostname} = $self->{ssh_hostname};
+        $self->{ssh}->check_options(option_results => $self->{option_results});
+    }
+    if ($self->{username} ne '' && $self->{option_results}->{password} eq '') {
+        $self->{output}->add_option_msg(short_msg => 'Need to specify --password option.');
+        $self->{output}->option_exit();
+    }
+
+    return 0;
+}
+
+sub get_connection_info {
+    my ($self, %options) = @_;
+
+    my $id = $self->{server} . ':' . $self->{port};
+    return md5_hex($id);
+}
+
+sub execute_command {
+    my ($self, %options) = @_;
+
+    my $command_options = "-h '" . $self->{server} . "' -p " . $self->{port};
+    $command_options .= $self->get_extra_options();
+    $command_options .= ' --no-raw ' . $options{command};
+
+    my $timeout = $self->{timeout};
+    if (!defined($timeout)) {
+        $timeout = defined($options{timeout}) ? $options{timeout} : 10;
+    }
+
+    my ($stdout, $exit_code);
+    if ($self->{ssh_hostname} ne '') {
+        ($stdout, $exit_code) = $self->{ssh}->execute(
+            hostname => $self->{ssh_hostname},
+            sudo => $self->{option_results}->{sudo},
+            command => 'redis-cli',
+            command_options => $command_options,
+            timeout => $timeout,
+            no_quit => $options{no_quit}
+        );
+    } else {
+        ($stdout, $exit_code) = centreon::plugins::misc::execute(
+            output => $self->{output},
+            sudo => $self->{option_results}->{sudo},
+            options => { timeout => $timeout },
+            command => 'redis-cli',
+            command_options =>  $command_options,
+            no_quit => $options{no_quit}
+        );
+    }
+
+    $self->{output}->output_add(long_msg => "command response: $stdout", debug => 1);
+
+    if ($stdout =~ /^NOPERM/m) {
+        $self->{output}->add_option_msg(short_msg => 'Permissions issue');
+        $self->{output}->option_exit();
+    }
+
+    return ($stdout, $exit_code);
+}
+
+sub get_extra_options {
+    my ($self, %options) = @_;
+
+    my $options = '';
+    $options .= ' --tls' if ($self->{tls} == 1);
+    $options .= " --cacert '" . $self->{cacert} . "'" if ($self->{cacert} ne '');
+    $options .= ' --insecure' if ($self->{insecure} == 1);
+    $options .= " --user '" . $self->{username} . "'" if ($self->{username} ne '');
+    $options .= " -a '" . $self->{password} . "'" if ($self->{password} ne '');
+    return $options;
+}
+
+sub ckquorum {
+    my ($self, %options) = @_;
+
+    my ($stdout) = $self->execute_command(command => $options{command});
+    return $stdout;
+}
+
+sub command {
+    my ($self, %options) = @_;
+
+    my ($stdout) = $self->execute_command(command => $options{command});
+    my $results = [];
+    while ($stdout =~ /^\d+\)(.*?)(?=\n\d+\)|\Z$)/msg) {
+        my @lines = split(/\n/, $1);
+        my $entry = {};
+        while (scalar(@lines) > 0) {
+            my $label = shift(@lines);
+            my $value = shift(@lines);
+            if (defined($label) && defined($value) && $label =~ /\d+\) "(.*)"/) {
+                $label = $1;
+                $entry->{$label} = $1 if ($value =~ /\d+\) "(.*)"/);
+            }
+        }
+
+        push @$results, $entry;
+    }
+    return $results;
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+redis-cli.
+
+=head1 SYNOPSIS
+
+redis-cli.
+
+=head1 REDIS SENTINEL OPTIONS
+
+=over 8
+
+=item B<--server>
+
+Sentinel server.
+
+=item B<--port>
+
+Sentinel port (Default: 26379).
+
+=item B<--tls>
+
+Establish a secure TLS connection (redis-cli >= 6.x mandatory).
+
+=item B<--cacert>
+
+CA Certificate file to verify with (redis-cli >= 6.x mandatory).
+
+=item B<--insecure>
+
+Allow insecure TLS connection by skipping cert validation (Since redis-cli 6.2.0).
+
+=item B<--username>
+
+Sentinel username (redis-cli >= 6.x mandatory).
+
+=item B<--password>
+
+Sentinel password.
+
+=item B<--ssh-hostname>
+
+Remote ssh redis-cli execution.
+
+=item B<--timeout>
+
+Timeout in seconds for the command (Default: 10).
+
+=back
+
+=head1 DESCRIPTION
+
+B<custom>.
+
+=cut
diff --git a/apps/redis/sentinel/mode/listclusters.pm b/apps/redis/sentinel/mode/listclusters.pm
new file mode 100644
index 000000000..6fa242f0b
--- /dev/null
+++ b/apps/redis/sentinel/mode/listclusters.pm
@@ -0,0 +1,96 @@
+#
+# Copyright 2021 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package apps::redis::sentinel::mode::listclusters;
+
+use base qw(centreon::plugins::mode);
+
+use strict;
+use warnings;
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+    
+    $options{options}->add_options(arguments => {});
+
+    return $self;
+}
+
+sub check_options {
+    my ($self, %options) = @_;
+    $self->SUPER::init(%options);
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    return $options{custom}->command(command => 'sentinel masters');
+}
+
+sub run {
+    my ($self, %options) = @_;
+  
+    my $results = $self->manage_selection(%options);
+    foreach my $entry (@$results) {
+        $self->{output}->output_add(
+            long_msg => '[name: ' . $entry->{name} . ']'
+        );
+    }
+    
+    $self->{output}->output_add(
+        severity => 'OK',
+        short_msg => 'List clusters:'
+    );
+    $self->{output}->display(nolabel => 1, force_ignore_perfdata => 1, force_long_output => 1);
+    $self->{output}->exit();
+}
+
+sub disco_format {
+    my ($self, %options) = @_;
+    
+    $self->{output}->add_disco_format(elements => ['name']);
+}
+
+sub disco_show {
+    my ($self, %options) = @_;
+
+    my $results = $self->manage_selection(%options);
+    foreach my $entry (@$results) {           
+        $self->{output}->add_disco_entry(
+            name => $entry->{name}
+        );
+    }
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+List clusters.
+
+=over 8
+
+=back
+
+=cut
diff --git a/apps/redis/sentinel/mode/redisclusters.pm b/apps/redis/sentinel/mode/redisclusters.pm
new file mode 100644
index 000000000..bc67ca0a1
--- /dev/null
+++ b/apps/redis/sentinel/mode/redisclusters.pm
@@ -0,0 +1,263 @@
+#
+# Copyright 2021 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package apps::redis::sentinel::mode::redisclusters;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold_ng);
+
+sub custom_status_output {
+    my ($self, %options) = @_;
+
+    return sprintf(
+        "status: %s [role: %s]",
+        $self->{result_values}->{status},
+        $self->{result_values}->{role}
+    );
+}
+
+sub prefix_cluster_output {
+    my ($self, %options) = @_;
+
+    return "cluster '" . $options{instance} . "' ";
+}
+
+sub cluster_long_output {
+    my ($self, %options) = @_;
+
+    return "checking cluster '" . $options{instance} . "'";
+}
+
+sub prefix_instance_output {
+    my ($self, %options) = @_;
+
+    return "instance '" . $options{instance} . "' ";
+}
+
+sub prefix_global_output {
+    my ($self, %options) = @_;
+
+    return 'number of ';
+}
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'clusters', type => 3, cb_prefix_output => 'prefix_cluster_output', cb_long_output => 'cluster_long_output', indent_long_output => '    ', message_multiple => 'All clusters are ok', 
+            group => [
+                { name => 'global', type => 0, cb_prefix_output => 'prefix_global_output', skipped_code => { -10 => 1 } },
+                { name => 'stddev', type => 0, skipped_code => { -10 => 1 } },
+                { name => 'instances', type => 1, display_long => 1, cb_prefix_output => 'prefix_instance_output', message_multiple => 'All redis instances are ok', skipped_code => { -10 => 1 } }
+            ]
+        }
+    ];
+
+    $self->{maps_counters}->{global} = [
+        { label => 'slaves-detected', nlabel => 'cluster.redis.slaves.detected.count', set => {
+                key_values => [ { name => 'num_slaves' } ],
+                output_template => 'detected slaves: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        },
+        { label => 'redis-sdown', nlabel => 'cluster.redis.subjectively_down.count', set => {
+                key_values => [ { name => 'sdown' } ],
+                output_template => 'subjectively down instances: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        },
+        { label => 'redis-odown', nlabel => 'cluster.redis.objectively_down.count', set => {
+                key_values => [ { name => 'odown' } ],
+                output_template => 'objectively down instances: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        }
+    ];
+
+    $self->{maps_counters}->{stddev} = [
+        { label => 'slave-repl-offset-stddev', nlabel => 'cluster.redis.slave_replication_offset.stddev.count', set => {
+                key_values => [ { name => 'stddev_repl_offset' } ],
+                output_template => 'slave replication offset standard deviation: %.2f',
+                perfdatas => [
+                    { template => '%.2f' }
+                ]
+            }
+        }
+    ];
+
+    $self->{maps_counters}->{instances} = [
+        {
+            label => 'status',
+            type => 2,
+            critical_default => '%{status} =~ /o_down|s_down|master_down|disconnected/i',
+            set => {
+                key_values => [
+                    { name => 'status' }, { name => 'role' }, 
+                    { name => 'address' }, { name => 'port' }, 
+                    { name => 'cluster_name' }
+                ],
+                closure_custom_output => $self->can('custom_status_output'),
+                closure_custom_perfdata => sub { return 0; },
+                closure_custom_threshold_check => \&catalog_status_threshold_ng
+            }
+        },
+        { label => 'redis-ping-ok-latency', nlabel => 'cluster.redis.ping_ok.latency.milliseconds', set => {
+                key_values => [ { name => 'ping_ok_latency' } ],
+                output_template => 'last ok ping: %s ms',
+                perfdatas => [
+                    { template => '%d', min => 0, unit => 's', label_extra_instance => 1 }
+                ]
+            }
+        }
+    ];
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options, force_new_perfdata => 1);
+    bless $self, $class;
+
+    $options{options}->add_options(arguments => {
+        'filter-cluster-name:s' => { name => 'filter_cluster_name' }
+    });
+
+    return $self;
+}
+
+sub add_instance {
+    my ($self, %options) = @_;
+
+    my $key = $options{entry}->{ip} . ':' . $options{entry}->{port};
+    $self->{clusters}->{ $options{cluster_name} }->{instances}->{$key} = {
+        cluster_name => $options{cluster_name},
+        address => $options{entry}->{ip},
+        port => $options{entry}->{port},
+        role => $options{entry}->{'role-reported'},
+        status => $options{entry}->{flags},
+        ping_ok_latency => $options{entry}->{'last-ok-ping-reply'},
+        slave_repl_offset => $options{entry}->{'slave-repl-offset'}
+    };
+    $self->{clusters}->{ $options{cluster_name} }->{global}->{sdown}++
+        if ($options{entry}->{flags} =~ /s_down/);
+    $self->{clusters}->{ $options{cluster_name} }->{global}->{odown}++
+        if ($options{entry}->{flags} =~ /o_down/);
+}
+
+sub stddev {
+    my ($self, %options) = @_;
+
+    my $total = 0;
+    my $num = 0;
+    foreach my $entry (values %{$self->{clusters}->{ $options{cluster_name} }->{instances}}) {
+        next if (!defined($entry->{slave_repl_offset}));
+        $total += $entry->{slave_repl_offset};
+        $num++;
+    }
+
+    return if ($num <= 1);
+
+    my $mean = $total / $num;
+    $total = 0;
+    foreach my $entry (values %{$self->{clusters}->{ $options{cluster_name} }->{instances}}) {
+        next if (!defined($entry->{slave_repl_offset}));
+        $total += ($mean - $entry->{slave_repl_offset}) ** 2;
+    }
+    $self->{clusters}->{ $options{cluster_name} }->{stddev} = { stddev_repl_offset => sqrt($total / $num) };
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    my $results = $options{custom}->command(command => 'sentinel masters');
+
+    $self->{clusters} = {};
+    foreach my $entry (@$results) {
+        next if (defined($self->{option_results}->{filter_cluster_name}) && $self->{option_results}->{filter_cluster_name} ne ''
+            && $entry->{name} !~ /$self->{option_results}->{filter_cluster_name}/);
+
+        $self->{clusters}->{ $entry->{name} } = {
+            global => { num_slaves => $entry->{'num-slaves'}, odown => 0, sdown => 0 },
+            instances => {}
+        };
+        $self->add_instance(cluster_name => $entry->{name}, entry => $entry);
+
+        my $replicas = $options{custom}->command(command => 'sentinel replicas ' . $entry->{name});
+        foreach (@$replicas) {
+            $self->add_instance(cluster_name => $entry->{name}, entry => $_);
+        }
+
+        $self->stddev(cluster_name => $entry->{name});
+    }
+
+    if (scalar(keys %{$self->{clusters}}) <= 0) {
+        $self->{output}->add_option_msg(short_msg => "No redis cluster found.");
+        $self->{output}->option_exit();
+    }
+
+    
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check redis clusters informations.
+
+=over 8
+
+=item B<--filter-cluster-name>
+
+Filter clusters by name (Can be a regexp).
+
+=item B<--unknown-status>
+
+Set unknown threshold for status.
+Can used special variables like: %{status}, %{role}, %{address}, %{port}, %{cluster_name}
+
+=item B<--warning-status>
+
+Set warning threshold for status.
+Can used special variables like: %{status}, %{role}, %{address}, %{port}, %{cluster_name}
+
+=item B<--critical-status>
+
+Set critical threshold for status (Default: '%{status} =~ /o_down|s_down|master_down|disconnected/i').
+Can used special variables like: %{status}, %{role}, %{address}, %{port}, %{cluster_name}
+
+=item B<--warning-*> B<--critical-*>
+
+Thresholds.
+Can be:  'redis-ping-ok-latency', 'redis-sdown', 'redis-odown', 
+'slave-repl-offset-stddev', 'slaves-detected'.
+
+=back
+
+=cut
diff --git a/apps/redis/sentinel/mode/sentinelclusters.pm b/apps/redis/sentinel/mode/sentinelclusters.pm
new file mode 100644
index 000000000..3ba1b51c1
--- /dev/null
+++ b/apps/redis/sentinel/mode/sentinelclusters.pm
@@ -0,0 +1,256 @@
+#
+# Copyright 2021 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 apps::redis::sentinel::mode::sentinelclusters;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold_ng);
+
+sub custom_status_output {
+    my ($self, %options) = @_;
+
+    return sprintf(
+        "status: %s",
+        $self->{result_values}->{status}
+    );
+}
+
+sub prefix_cluster_output {
+    my ($self, %options) = @_;
+
+    return "cluster '" . $options{instance} . "' ";
+}
+
+sub cluster_long_output {
+    my ($self, %options) = @_;
+
+    return "checking cluster '" . $options{instance} . "'";
+}
+
+sub prefix_instance_output {
+    my ($self, %options) = @_;
+
+    return "instance '" . $options{instance} . "' ";
+}
+
+sub prefix_global_output {
+    my ($self, %options) = @_;
+
+    return 'number of sentinels ';
+}
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'clusters', type => 3, cb_prefix_output => 'prefix_cluster_output', cb_long_output => 'cluster_long_output', indent_long_output => '    ', message_multiple => 'All clusters are ok', 
+            group => [
+                { name => 'global', type => 0, cb_prefix_output => 'prefix_global_output', skipped_code => { -10 => 1 } },
+                { name => 'quorum', type => 0, skipped_code => { -10 => 1 } },
+                { name => 'instances', type => 1, display_long => 1, cb_prefix_output => 'prefix_instance_output', message_multiple => 'All sentinel instances are ok', skipped_code => { -10 => 1 } }
+            ]
+        }
+    ];
+
+    $self->{maps_counters}->{global} = [
+        { label => 'sentinels-detected', nlabel => 'cluster.sentinels.detected.count', set => {
+                key_values => [ { name => 'num_sentinels' } ],
+                output_template => 'detected: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        },
+        { label => 'sentinels-sdown', nlabel => 'cluster.sentinels.subjectively_down.count', set => {
+                key_values => [ { name => 'sdown' } ],
+                output_template => 'subjectively down: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        },
+        { label => 'sentinels-odown', nlabel => 'cluster.sentinels.objectively_down.count', set => {
+                key_values => [ { name => 'odown' } ],
+                output_template => 'objectively down: %s',
+                perfdatas => [
+                    { template => '%s', min => 0, label_extra_instance => 1 }
+                ]
+            }
+        }
+    ];
+
+    $self->{maps_counters}->{quorum} = [
+        {
+            label => 'quorum-status',
+            type => 2,
+            critical_default => '%{status} =~ /noQuorum/',
+            set => {
+                key_values => [ { name => 'status' }, { name => 'cluster_name' } ],
+                output_template => 'quorum status: %s',
+                closure_custom_perfdata => sub { return 0; },
+                closure_custom_threshold_check => \&catalog_status_threshold_ng
+            }
+        }
+    ];
+
+    $self->{maps_counters}->{instances} = [
+        {
+            label => 'status',
+            type => 2,
+            critical_default => '%{status} =~ /o_down|s_down|master_down|disconnected/i',
+            set => {
+                key_values => [
+                    { name => 'status' }, { name => 'address' }, { name => 'port' }, { name => 'cluster_name' }
+                ],
+                closure_custom_output => $self->can('custom_status_output'),
+                closure_custom_perfdata => sub { return 0; },
+                closure_custom_threshold_check => \&catalog_status_threshold_ng
+            }
+        },
+        { label => 'sentinel-ping-ok-latency', nlabel => 'cluster.sentinel.ping_ok.latency.milliseconds', set => {
+                key_values => [ { name => 'ping_ok_latency' } ],
+                output_template => 'last ok ping: %s ms',
+                perfdatas => [
+                    { template => '%d', min => 0, unit => 's', label_extra_instance => 1 }
+                ]
+            }
+        }
+    ];
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options, force_new_perfdata => 1);
+    bless $self, $class;
+
+    $options{options}->add_options(arguments => {
+        'filter-cluster-name:s' => { name => 'filter_cluster_name' }
+    });
+
+    return $self;
+}
+
+sub add_instance {
+    my ($self, %options) = @_;
+
+    my $key = $options{entry}->{ip} . ':' . $options{entry}->{port};
+    $self->{clusters}->{ $options{cluster_name} }->{instances}->{$key} = {
+        cluster_name => $options{cluster_name},
+        address => $options{entry}->{ip},
+        port => $options{entry}->{port},
+        status => $options{entry}->{flags},
+        ping_ok_latency => $options{entry}->{'last-ok-ping-reply'}
+    };
+    $self->{clusters}->{ $options{cluster_name} }->{global}->{sdown}++
+        if ($options{entry}->{flags} =~ /s_down/);
+    $self->{clusters}->{ $options{cluster_name} }->{global}->{odown}++
+        if ($options{entry}->{flags} =~ /o_down/);
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    my $results = $options{custom}->command(command => 'sentinel masters');
+
+    $self->{clusters} = {};
+    foreach my $entry (@$results) {
+        next if (defined($self->{option_results}->{filter_cluster_name}) && $self->{option_results}->{filter_cluster_name} ne ''
+            && $entry->{name} !~ /$self->{option_results}->{filter_cluster_name}/);
+
+        $self->{clusters}->{ $entry->{name} } = {
+            global => { num_sentinels => $entry->{'num-other-sentinels'}, odown => 0, sdown => 0 },
+            quorum => { status => 'unknown', cluster_name => $entry->{name} },
+            instances => {}
+        };
+
+        my $quorum = $options{custom}->ckquorum(command => 'sentinel ckquorum ' . $entry->{name});
+        if ($quorum =~ /OK \d+ usable Sentinels/m) {
+            $self->{clusters}->{ $entry->{name} }->{quorum}->{status} = 'ok';
+        } elsif ($quorum =~ /NOQUORUM \d+ usable Sentinels/m) {
+            $self->{clusters}->{ $entry->{name} }->{quorum}->{status} = 'noQuorum';
+        }
+
+        my $sentinels = $options{custom}->command(command => 'sentinel sentinels ' . $entry->{name});
+        foreach (@$sentinels) {
+            $self->add_instance(cluster_name => $entry->{name}, entry => $_);
+        }
+    }
+
+    if (scalar(keys %{$self->{clusters}}) <= 0) {
+        $self->{output}->add_option_msg(short_msg => "No sentinel cluster found.");
+        $self->{output}->option_exit();
+    }
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check sentinel clusters informations.
+
+=over 8
+
+=item B<--filter-cluster-name>
+
+Filter clusters by name (Can be a regexp).
+
+=item B<--unknown-status>
+
+Set unknown threshold for status.
+Can used special variables like: %{status}, %{address}, %{port}, %{cluster_name}
+
+=item B<--warning-status>
+
+Set warning threshold for status.
+Can used special variables like: %{status}, %{address}, %{port}, %{cluster_name}
+
+=item B<--critical-status>
+
+Set critical threshold for status (Default: '%{status} =~ /o_down|s_down|master_down|disconnected/i').
+Can used special variables like: %{status}, %{address}, %{port}, %{cluster_name}
+
+=item B<--unknown-status>
+
+Set unknown threshold for status.
+Can used special variables like: %{status}, %{address}, %{port}, %{cluster_name}
+
+=item B<--warning-quorum-status>
+
+Set warning threshold for quorum status.
+Can used special variables like: %{status}, %{address}, %{port}, %{cluster_name}
+
+=item B<--critical-quorum-status>
+
+Set critical threshold for quorum status (Default: '%{status} =~ /noQuorum/').
+Can used special variables like: %{status}, %{cluster_name}
+
+=item B<--warning-*> B<--critical-*>
+
+Thresholds.
+Can be:  'sentinel-ping-ok-latency', 'sentinels-sdown', 'sentinels-odown', 'sentinels-detected'.
+
+=back
+
+=cut
diff --git a/apps/redis/sentinel/plugin.pm b/apps/redis/sentinel/plugin.pm
new file mode 100644
index 000000000..169208a25
--- /dev/null
+++ b/apps/redis/sentinel/plugin.pm
@@ -0,0 +1,50 @@
+#
+# Copyright 2021 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 apps::redis::sentinel::plugin;
+
+use strict;
+use warnings;
+use base qw(centreon::plugins::script_custom);
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+
+    $self->{modes} = {
+        'redis-clusters'    => 'apps::redis::sentinel::mode::redisclusters',
+        'list-clusters'     => 'apps::redis::sentinel::mode::listclusters',
+        'sentinel-clusters' => 'apps::redis::sentinel::mode::sentinelclusters'
+    };
+
+    $self->{custom_modes}->{cli} = 'apps::redis::sentinel::custom::cli';
+    return $self;
+}
+
+1;
+
+__END__
+
+=head1 PLUGIN DESCRIPTION
+
+Check Redis sentinel.
+
+=cut
diff --git a/database/redis/plugin.pm b/database/redis/plugin.pm
index fbff996c5..30adb07b0 100644
--- a/database/redis/plugin.pm
+++ b/database/redis/plugin.pm
@@ -52,3 +52,5 @@ __END__
 =head1 PLUGIN DESCRIPTION
 
 Check Redis database.
+
+=cut