====== Collectd-Graphen mit Graphite und Grafana ======
Ausgehend von einem CentOS 7:
<code bash>
cat <<EOF >/etc/yum.repos.d/grafana.repo
[grafana]
name=grafana
baseurl=https://packagecloud.io/grafana/stable/el/7/\$basearch
repo_gpgcheck=1
enabled=1
gpgcheck=1
gpgkey=https://packagecloud.io/gpg.key https://grafanarel.s3.amazonaws.com/RPM-GPG-KEY-grafana
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt
EOF
yum -y install epel-release
yum -y install collectd grafana graphite-web python-carbon python-psycopg2
</code>
Ich benutze eine externe PostgreSQL DB. Wer eine lokale möchte:
<code bash>
yum install https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm
yum install postgresql96-server
/usr/pgsql-9.6/bin/postgresql96-setup initdb
systemctl enable postgresql-9.6.service --now
</code>
PostgreSQL User anlegen (auf dem PostgreSQL Server oder lokal):
<code bash>
su - postgres
createuser -P collectd
createdb -O collectd grafana
createdb -O collectd graphite
</code>
/var/lib/pgsql/9.6/data/pg_hba.conf:
<code>
host all all 0.0.0.0/0 md5
</code>
/etc/graphite-web/local_settings.py:
<file>
SECRET_KEY=...
TIME_ZONE=...
DATABASES = {
        'default': {
                'NAME': 'graphite',
                'ENGINE': 'django.db.backends.postgresql_psycopg2',
                'USER': 'collectd',
                'PASSWORD': 'PASSWORT',
                'HOST': 'IP-ADRESSE',
                'PORT': '5432'
        }
}
</file>
<code>graphite-manage syncdb</code>
/etc/httpd/conf.d/graphite-web.conf:
<code>Require local</code>
ändern in
<code>Require all granted</code>
<code bash>rm /etc/httpd/conf.d/welcome.conf</code>
/etc/grafana/grafana.ini:
<file>
type = postgres
host = IP-ADRESSE
user = collectd
password = PASSWORT
</file>
/etc/collectd.conf:
<file>
LoadPlugin network
LoadPlugin write_graphite
<Plugin network>
        Listen "0.0.0.0" "25826"
</Plugin>
<Plugin write_graphite>
  <Node "graphite">
    Host "localhost"
    Port "2003"
    Protocol "tcp"
    ReconnectInterval 0
    LogSendErrors true
    Prefix "collectd_"
    StoreRates true
    AlwaysAppendDS false
    EscapeCharacter "_"
    SeparateInstances false
    PreserveSeparator false
    DropDuplicateFields false
  </Node>
</Plugin>
</file>
/etc/carbon/storage-schemas.conf:
<file>
[collectd]
pattern = ^collectd
retentions = 10s:3d,1m:14d,10m:90d,30m:260d,1h:3y
</file>
<code bash>
setsebool -P collectd_tcp_network_connect=on
setsebool -P httpd_can_network_connect=on
systemctl enable carbon-cache --now
systemctl enable httpd --now
systemctl enable collectd --now
systemctl enable grafana-server --now
</code>
Auf <IP>:3000 einloggen (User admin, Passwort admin):
  * Add a datasource
  * Name: graphite
  * Type: Graphite
  * <nowiki>URL: http://localhost</nowiki>
  * Access: proxy