PMDACHRONY(1)

✨ PMDACHRONY ✨

okay bestie, welcome to the pmdachrony manual page, from the General Commands Manual section 💅 this one's short and sweet but lowkey important, so let's get into it 🫶

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🌸 NAME 🌸

pmdachrony — the chronyd PMDA 💖

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🦋 DESCRIPTION 🦋

so pmdachrony is a Performance Metrics Domain Agent, aka a PMDA (iykyk 👑). what does it do? it exports metric values straight outta chronyd, the way they get exposed by the chronyc utility ✨

that's it. that's the whole job. it's giving "middle manager for your clock metrics" and honestly? slay 💅

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🎀 INSTALLATION 🎀

wanna install the chrony PMDA? you gotta use the Install script, and you gotta be root for it, no cap 👑

# cd $PCP_PMDAS_DIR/chrony
# ./Install

and when you're over it and wanna uninstall? same energy, still as root:

# cd $PCP_PMDAS_DIR/chrony
# ./Remove

okay now here's the part that matters 🚨 pmdachrony is launched by pmcd(1) and should never be executed directly. like, ever. do not do it. not even once. 🙈

also cute detail: the Install and Remove scripts will notify pmcd(1) whenever the agent gets installed or removed, so it always knows what's up 📣

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🌈 FILES 🌈

• $PCP_PMDAS_DIR/chrony/Install — the installation script for the pmdachrony agent 🧚
• $PCP_PMDAS_DIR/chrony/Remove — the undo-installation script for the pmdachrony agent (yes, the reverse button) 💜
• $PCP_LOG_DIR/pmcd/chrony.log — the default log file where pmdachrony drops its error messages when things go sideways 😭

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⭐ PCP ENVIRONMENT ⭐

so PCP uses env vars with the prefix PCP_ to parameterize all the file and directory names it works with, and they're literally everywhere 🫶

every time you install, the file /etc/pcp.conf holds the local values for these variables 📝

and if you wanna point at a different config file? you can, using the $PCP_CONF variable — it lets you specify an alternative configuration file, exactly as described in pcp.conf(5) ✨

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👑 SEE ALSO 👑

PCPIntro(1), pmcd(1), chronyc(1) and chronyd(8) 💖

go read those, bestie, they're the supporting cast 🎀

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Performance Co-Pilot · PCP · PMDACHRONY(1)

and that's the whole page, babe 💅 that source/version + date situation at the bottom is your lil sign-off — Performance Co-Pilot, PCP, PMDACHRONY(1) — so go forth, install your chrony PMDA as root, and never ever run pmdachrony by hand. mwah 💖🦋🌸