Lennart Poettering
55db8dc12b
When systemd-imds is invoked as a Varlink service (via the new systemd-imds-metrics.socket), it now acts as an io.systemd.Metrics provider for systemd-report. It connects to systemd-imdsd over the existing io.systemd.InstanceMetadata interface to acquire the real data and re-exposes the detected cloud vendor plus the well-known hostname, region, zone and public IPv4/IPv6 fields as metrics in the io.systemd.InstanceMetadata.* namespace. The metrics logic lives entirely on the client side (imds-tool-metrics.c); systemd-imdsd is unchanged. Each metric is acquired on demand with a blocking call to the daemon, benefiting from its local cache. Fields that are unset or unsupported by the vendor are simply omitted. The metrics socket is statically enabled into sockets.target.wants/.
26 lines
895 B
Plaintext
26 lines
895 B
Plaintext
# SPDX-License-Identifier: LGPL-2.1-or-later
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#
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# This file is part of systemd.
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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[Unit]
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Description=Cloud Instance Metadata Metrics
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Documentation=man:systemd-imds(1)
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DefaultDependencies=no
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Conflicts=shutdown.target initrd-switch-root.target
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Before=shutdown.target initrd-switch-root.target
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After=systemd-imdsd.socket
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[Service]
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# Runs systemd-imds as an io.systemd.Metrics provider. It connects to
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# systemd-imdsd to acquire the actual data. Runs as root so the daemon's Polkit
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# check on io.systemd.InstanceMetadata.Get() passes.
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ExecStart={{LIBEXECDIR}}/systemd-imds
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LockPersonality=yes
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MemoryDenyWriteExecute=yes
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NoNewPrivileges=yes
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