CentOS 7
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Sensu : Install
2017/10/23
 
Install Sensu that is the monitoring platform.
[1] Install Redis first because Sensu uses it for data store.
# install from EPEL

[root@dlp ~]#
yum --enablerepo=epel -y install redis
[root@dlp ~]#
vi /etc/redis.conf
# line 61: change (allow connections from other hosts)

bind
0.0.0.0
# line 80: change

protected-mode
no
# line 481: add (connection password)

requirepass password
[root@dlp ~]#
systemctl start redis

[root@dlp ~]#
systemctl enable redis
[2] Add Sensu repository and Install Sensu and also Uchiwa that is the web dashboard tool.
[root@dlp ~]#
cat > /etc/yum.repos.d/sensu.repo <<'EOF'
[sensu]
name=sensu
baseurl=https://sensu.global.ssl.fastly.net/yum/$releasever/$basearch/
enabled=0
gpgcheck=0
EOF
[root@dlp ~]#
yum --enablerepo=sensu -y install sensu uchiwa
[3]
Create SSL certificates for Uchiwa dashboard, refer to here.
[4] Configure Sensu and Uchiwa.
[root@dlp ~]#
cp -p /etc/pki/tls/certs/server.key /etc/sensu/uchiwa.key

[root@dlp ~]#
cp -p /etc/pki/tls/certs/server.crt /etc/sensu/uchiwa.crt

[root@dlp ~]#
chown uchiwa. /etc/sensu/uchiwa.*

[root@dlp ~]#
vi /etc/sensu/config.json
# create new

{
  "transport": {
    "name": "redis"
  },
  "api": {
    "host": "127.0.0.1",
    "port": 4567
  }
}
[root@dlp ~]#
vi /etc/sensu/conf.d/redis.json
# create new

# for [password], specify the one set on [1] section

{
  "redis": {
    "host": "127.0.0.1",
    "port": 6379,
    "password": "password"
  }
}
[root@dlp ~]#
vi /etc/sensu/conf.d/client.json
# create new

# for [subscriptions], set any words you like (define role)

{
  "client": {
    "environment": "development",
    "name": "dlp",
    "address": "127.0.0.1",
    "subscriptions": [
      "development",
      "sensu-server"
    ]
  }
}
[root@dlp ~]#
vi /etc/sensu/uchiwa.json
# change like follows

# for [adminpassword], set any password you like

{
  "sensu": [
    {
      "name": "dlp.srv.world",
      "host": "127.0.0.1",
      "port": 4567,
      "timeout": 10
    }
  ],
  "uchiwa": {
    "host": "0.0.0.0",
    "port": 3000,
    "refresh": 10,
    "user": "admin",
    "pass": "adminpassword",
    "ssl": {
      "certfile": "/etc/sensu/uchiwa.crt",
      "keyfile": "/etc/sensu/uchiwa.key"
    }
  }
}
[root@dlp ~]#
chown sensu. /etc/sensu/config.json /etc/sensu/conf.d/*

[root@dlp ~]#
systemctl start sensu-server sensu-api sensu-client uchiwa

[root@dlp ~]#
systemctl enable sensu-server sensu-api sensu-client uchiwa
[5] If Firewalld is running, allow Redis, Sensu, Uchiwa service ports.
[root@dlp ~]#
firewall-cmd --add-port={6379/tcp,4567/tcp,3000/tcp} --permanent

success
[root@dlp ~]#
firewall-cmd --reload

success
[6] Access to [https://(Uchiwa server's hostname or Ip address):3000/] from Client Computer, then authentication is required like follows, input username and password you set on Uchiwa Config.
[7] After authentication normally, Uchiwa Dashboard is show.
 
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