systemd support

[repeatedly]

Check list:

• How to override environment variable:

  omnibus-td-agent/templates/etc/init.d/rpm/td-agent

  Line 15 in 77f2ae9

  TD_AGENT_NAME=<%= Shellwords.shellescape(project_name) %>

• How to set ulimit parameter:

  omnibus-td-agent/templates/etc/init.d/rpm/td-agent

  Line 190 in 77f2ae9

  ulimit -n 65536 1>/dev/null 2>&1 || true

• How to export LD_PRELOAD:

  omnibus-td-agent/templates/etc/init.d/rpm/td-agent

  Line 166 in 77f2ae9

  export LD_PRELOAD="${TD_AGENT_HOME}/embedded/lib/libjemalloc.so"

One fluentd example: https://gist.github.com/saidie/591157d2c9e306ff43d4

[repeatedly]

EnvironmentFile is good for 1st case.

[repeatedly]

/etc/systemd/system/td-agent.service.d/limits.conf seems to resolve 2nd case.

[repeatedly]

Environment is used for 3rd case.

Environment=LD_PRELOAD="${TD_AGENT_HOME}/embedded/lib/libjemalloc.so"

[cosmok]

Is there an update on this?

[repeatedly]

Here is an example of service file. Does anyone review this?

[Unit]
Description=Treasure Agent: A data collector for Treasure Data
Documentation=https://docs.treasuredata.com/articles/td-agent
After=network-online.target
Wants=network-online.target

[Service]
User=td-agent
Group=td-agent
LimitNOFILE=65536
Environment=LD_PRELOAD=/opt/td-agent/embedded/lib/libjemalloc.so
Environment=GEM_HOME=/opt/td-agent/embedded/lib/ruby/gems/2.4.0/
Environment=GEM_PATH=/opt/td-agent/embedded/lib/ruby/gems/2.4.0/
Environment=FLUENT_CONF=/etc/td-agent/td-agent.conf
Environment=FLUENT_PLUGIN=/etc/td-agent/plugin
Environment=FLUENT_SOCKET=/var/run/td-agent/td-agent.sock
PIDFile=/var/run/td-agent/td-agent.pid
Type=forking
ExecStart=/opt/td-agent/embedded/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /var/run/td-agent/td-agent.pid
ExecStop=/bin/kill -TERM ${MAINPID}
ExecReload=/bin/kill -HUP ${MAINPID}
Restart=always
TimeoutStopSec=120

[Install]
WantedBy=multi-user.target