This area documents configuration of Telegraf for monitoring power and thermal for UCS stand alone C series servers. This was written specifically for C125 servers, but should work with other stand alone C series servers. This was written for a specific scenario / customer condition, and may reflect specific files relevant to that implementation.
This process creates a database of power and temperature statistics stored in InfluxDB. InfluxDB is used because it was developed for the kind of data we need to ingest and has readily available tools for populating the database and displaying stored data with little to no development required.
In this instance we use Telegraf to import redish API data into InfluxDB, and the data in the database is easily displayed using common tools such as Grafana. In this instance we demonstrate obtaining power and thermal information from a C125 UCS server using the redfish API.
Note that CentOS 7 or RHEL 7 do not offer Telegraf or InfluxDB, and we will provide links to public locations for these utilities.
InfluxDB location (RHEL7)
https://repos.influxdata.com/rhel/7/x86_64/stable/
influxdb-1.8.10.x86_64.rpm
We install these files locally. In this example we pull the files with wget, install them with yum, and then configure the database and user. We do not expose the database through the firewall and this example assumes that the influxdb and telegraf resources are on the same server.
Pull the files locally and install with yum
# We will pull these files from the influxdb repository.
influxSource=https://repos.influxdata.com/rhel/7/x86_64/stable/influxdb-1.8.10.x86_64.rpm
# This pulls the files locally.
wget $influxSource
# Installs InfluxDB
yum install influxdb-1.8.10.x86_64.rpm
Start and enable service
systemctl start influxdb
systemctl enable influxdb
Create database and associated user
influx -execute 'create database telegrafdb'
influx -database telegraf -execute "CREATE USER telegrafu WITH PASSWORD 'Passw0rd123'"
influx -database telegraf -execute "GRANT ALL ON telegrafdb TO telegrafu"
Telegraf location (RHEL7)
https://repos.influxdata.com/rhel/7/x86_64/stable/
telegraf-1.24.1-1.x86_64.rpm
We install these files locally. In this example we pull the files with wget, install them with yum, and then configure polling of a server through redfish. In this instance we assume that the InfluxDB database is on the same server, though it is possible to separate them.
Pull the files locally and install with yum
# We will pull these files from the influxdb repository (InfluxDB and Telegraf are stored in the same repo).
telegrafSource=https://repos.influxdata.com/rhel/7/x86_64/stable/telegraf-1.24.1-1.x86_64.rpm
# This pulls the files locally.
wget $telegrafSource
# Installs Telegraf
yum install telegraf-1.24.1-1.x86_64.rpm
Configure Telegraph Input and Output
# Protect the original telegraf.conf file
mv /etc/telegraf/telegraf.conf /etc/telegraf/telegraf.conf.original
# Create a new telegraf file with default top level settings
cat <<EOF > /etc/telegraf/telegraf.conf
[global_tags]
[agent]
# This is not the default, and you can set it to how often you want to poll your servers.
interval = "30s"
round_interval = true
metric_batch_size = 1000
metric_buffer_limit = 10000
collection_jitter = "0s"
flush_interval = "10s"
flush_jitter = "0s"
precision = ""
debug = false
hostname = ""
omit_hostname = true
# If do not want telegraf logs, you can remove this line. Once you have everything working I would remove this.
logfile = "/var/log/telegraf/telegraf.log"
EOF
# Set outputs to InfluxDB
cat <<EOF >> /etc/telegraf/telegraf.conf
[[outputs.influxdb]]
# Location of InfluxDB database
urls = ["http://127.0.0.1:8086"]
# Name of the database to write to
database = "telegrafdb"
# User name with access to the InfluxDB database
username = "telegrafu"
# User Password
password = "Passw0rd123"
user_agent = "telegraf"
EOF
# Configure Telegraf to Poll a server supported by Redfish
cat <<EOF >> /etc/telegraf/telegraf.conf
[[inputs.redfish]]
# Cisco Management IP (CIMC)
address = "https://10.1.1.1"
# A user created through the CIMC for API access.
username = "CIMCUserName"
#The password for the API User
password = "CIMCPassword"
# The serial number of the system to be captured
computer_system_id = "WZP23000AA"
# Allows for self signed certificates to be accepted.
insecure_skip_verify = true
EOF
Start and enable service
systemctl start telegraf
systemctl enable telegraf
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