Add Flatcar Container Linux and CoreOS to recognized Linux platforms#42186
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salgattll wants to merge 1 commit intofleetdm:mainfrom
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Add Flatcar Container Linux and CoreOS to recognized Linux platforms#42186salgattll wants to merge 1 commit intofleetdm:mainfrom
salgattll wants to merge 1 commit intofleetdm:mainfrom
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Flatcar reports platform=flatcar and platform_like=coreos via osquery's os_version table. Neither value is in HostLinuxOSs, causing PlatformFromHost to return "" and platform-filtered detail queries (network_interface_unix, disk space, etc.) to never be sent. Hosts enroll and respond to live queries correctly, but host details like IP address and disk space are never populated. Adds "flatcar" and "coreos" to HostLinuxOSs, HostNeitherDebNorRpmPackageOSs, HOST_LINUX_PLATFORMS, and the host vitals documentation. Resolves fleetdm#42185
salgattll
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sgress454 and
sharon-fdm
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lucasmrod
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Mar 20, 2026
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LGTM.
Thanks for the contribution!
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #42186 +/- ##
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- Coverage 66.48% 66.47% -0.01%
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Files 2516 2516
Lines 202049 202049
Branches 9070 9071 +1
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- Hits 134333 134320 -13
- Misses 55580 55590 +10
- Partials 12136 12139 +3
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Resolves #42185
Summary
flatcarandcoreostoHostLinuxOSsinserver/fleet/hosts.goHostNeitherDebNorRpmPackageOSs(neither distro uses deb or rpm)HOST_LINUX_PLATFORMSinfrontend/interfaces/platform.tsserver/fleet/hosts_test.godocs/Contributing/product-groups/orchestration/understanding-host-vitals.mdProblem
Flatcar Container Linux reports
platform=flatcarandplatform_like=coreosvia osquery'sos_versiontable. Neither value is inHostLinuxOSs, soPlatformFromHost("flatcar")returns""andRunsForPlatformskips all Linux-platform-filtered detail queries.Symptoms: Flatcar hosts enroll successfully, appear online, and respond to live queries. But host details (private IP, disk space, etc.) are never populated because the detail queries that collect this data are never sent to the host.
Context
Flatcar Container Linux is an immutable, container-optimized Linux distribution (successor to CoreOS Container Linux). We deploy Fleet's Orbit agent on Flatcar via systemd-sysext and have confirmed that all osquery tables work correctly — the only gap was this platform string not being recognized.
This follows the same pattern as prior platform additions: #19011 (tuxedo), #28977 (neon), #34357 (manjaro-arm).
Changes file
changes/Checklist
HostLinuxOSslocally