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meminfo_numa: fix crash on CentOS 6 kernel

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It turns out, on some kernels (notably - CentOS6) there is an empty line
inserted at the beginning of /sys/devices/system/node/node*/meminfo
files.  The leads to node_exporter crash on such kernels.

Fix this by checking for empty string first.

Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
This commit is contained in:
Pavel Borzenkov 2016-02-06 15:32:25 +03:00
commit 5a085dcaf5
3 changed files with 6 additions and 1 deletions
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1
collector/fixtures/sys/devices/system/node/node0/meminfo
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@ -1,3 +1,4 @@
Node 0 MemTotal: 134182340 kB
Node 0 MemFree: 53030372 kB
Node 0 MemUsed: 81151968 kB

1
collector/fixtures/sys/devices/system/node/node1/meminfo
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@ -1,3 +1,4 @@
Node 1 MemTotal: 134217728 kB
Node 1 MemFree: 39634788 kB
Node 1 MemUsed: 94582940 kB