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sysctl: downgrade message when we have no permission

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We need to run sysctl also in containers, because the network
subtree is namespaces and may legitimately be writable. But logging
all "errors" at notice level creates unwanted noise.

Also downgrade message about missing sysctls to log_info. This might also be
relatively common when configuration is targeted at different kernel
versions. With log_debug it'll still end up in the logs, but isn't really worth
of "notice" most of the time.

https://bugzilla.redhat.com/show_bug.cgi?id=1609806
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-01-16 14:45:28 +01:00
parent b2ae4d9eb8
commit 32458cc968
1 changed files with 9 additions and 6 deletions
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15
src/sysctl/sysctl.c
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@ -11,6 +11,7 @@
#include "conf-files.h"
#include "def.h"
#include "errno-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "hashmap.h"
@ -85,13 +86,15 @@ static int apply_all(OrderedHashmap *sysctl_options) {
k = sysctl_write(option->key, option->value);
if (k < 0) {
/* If the sysctl is not available in the kernel or we are running with reduced
* privileges and cannot write it, then log about the issue at LOG_NOTICE level, and
* proceed without failing. (EROFS is treated as a permission problem here, since
* that's how container managers usually protected their sysctls.) In all other cases
* log an error and make the tool fail. */
* privileges and cannot write it, then log about the issue, and proceed without
* failing. (EROFS is treated as a permission problem here, since that's how
* container managers usually protected their sysctls.) In all other cases log an
* error and make the tool fail. */
if (IN_SET(k, -EPERM, -EACCES, -EROFS, -ENOENT) || option->ignore_failure)
log_notice_errno(k, "Couldn't write '%s' to '%s', ignoring: %m", option->value, option->key);
if (option->ignore_failure || k == -EROFS || ERRNO_IS_PRIVILEGE(k))
log_debug_errno(k, "Couldn't write '%s' to '%s', ignoring: %m", option->value, option->key);
else if (k == -ENOENT)
log_info_errno(k, "Couldn't write '%s' to '%s', ignoring: %m", option->value, option->key);
else {
log_error_errno(k, "Couldn't write '%s' to '%s': %m", option->value, option->key);
if (r == 0)