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During package install on systemd-based systems, some sysctl settings should be set (e.g. vm.max_map_count). In some environments, changing sysctl settings plainly does not work; previously a global environment variable named ES_SKIP_SET_KERNEL_PARAMETERS was introduced to skip calling sysctl, but this causes trouble for: - configuration management systems, which usually cannot apply an env var when running a package manager - package upgrades, which will not have the env var set any more, and thus leaving the package management system in a bad state (possibly half-way upgraded, can be very hard to recover) This removes the env var again and instead of calling systemd-sysctl manually, tells systemd to restart the wrapper unit - which itself can be masked by system administrators or management tools if it is known that sysctl does not work in a given environment. The restart is not silent on systems in their default configuration, but is ignored if the unit is masked. Relates #24234
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191 B
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NOTE: On systemd-based distributions, the installation scripts will attempt to set kernel parameters (e.g.,
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`vm.max_map_count`); you can skip this by masking the systemd-sysctl.service unit.
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