[rancid] arrancid (2.3.4) - ignore bytes free in ShowFlash

Discussion:

Stefan Jakob

2012-03-16 10:24:53 UTC

Hi rancid list,

Is it rancid style to ignore the output of bytes free in sub ShowFlash
of arrancid?

Versions:

arrancid: rancid 2.3.4, Debian Squeeze
EOS: Software image version: 4.8.3, Arista DCS-7124SX-F

Looks like Arista stores some ntp drift info on a regular base to the flash:

bash-4.0# pwd
/mnt/flash/persist
bash-4.0# ls -ls -rtl
total 20
12 -rwxrwx--- 1 root eosadmin 10240 Mar 14 12:07 sys
8 -rwxrwx--- 1 root eosadmin 5120 Mar 16 08:12 local

Guess this causes arrancid to "see" a diff in ShowFlash everytime this
happens. Guess this is just noise?

- !Flash: 1779585024 bytes total (1318834176 bytes free)
+ !Flash: 1779585024 bytes total (1318830080 bytes free)

@Arista: Why not in tmpfs? This might hurt the flash. If there is ntp
configured, this shouldn't matter to lose the drift info, after a reboot.

I checked 2.3.8, but can't really see, that it's parsed diffrent

So is it possible to ignore the line?

Rgds, SJ

heasley

2012-03-20 23:53:29 UTC

Permalink

Post by Stefan Jakob
Hi rancid list,
Is it rancid style to ignore the output of bytes free in sub ShowFlash
of arrancid?
arrancid: rancid 2.3.4, Debian Squeeze
EOS: Software image version: 4.8.3, Arista DCS-7124SX-F
happens. Guess this is just noise?

until it gets to zero?

Post by Stefan Jakob
- !Flash: 1779585024 bytes total (1318834176 bytes free)
+ !Flash: 1779585024 bytes total (1318830080 bytes free)
@Arista: Why not in tmpfs? This might hurt the flash. If there is ntp
configured, this shouldn't matter to lose the drift info, after a reboot.

for XR, it summarized as follows. does this work for arista?

Index: bin/arrancid.in
===================================================================
--- bin/arrancid.in (revision 2431)
+++ bin/arrancid.in (working copy)
@@ -304,6 +304,21 @@
# persist changes constantly if you're running ntp, so
# skip its updates.
/\spersist$/ && next;
+
+ if (/.*$(\d+) bytes free$/) {
+ my($tmp) = $1;
+ if ($tmp >= (1024 * 1024 * 1024)) {
+ $tmp = int($tmp / (1024 * 1024 * 1024));
+ s/$1 bytes free/$tmp GB free/;
+ } elsif ($tmp >= (1024 * 1024)) {
+ $tmp = int($tmp / (1024 * 1024));
+ s/$1 bytes free/$tmp MB free/;
+ } else {
+ $tmp = int($tmp / 1024);
+ s/$1 bytes free/$tmp KB free/;
+ }
+ }
+
ProcessHistory("FLASH","","","!Flash: $_");
}
ProcessHistory("","","","!\n");

Stefan Jakob

2012-07-02 07:53:06 UTC

Permalink

Post by heasley

until it gets to zero?

This byte drift only occures for the first couple of days and is caused
by the automatic rotation of the tech support logs:

/mnt/flash/schedule/tech-support

[***@localhost tech-support]$ ls -rtl
total 240
-rwxrwx--- 1 root eosadmin 17998 Jul 2 05:03
tech-support_2012-07-02.0503.log.gz
-rwxrwx--- 1 root eosadmin 17997 Jul 2 05:18
tech-support_2012-07-02.0518.log.gz
-rwxrwx--- 1 root eosadmin 17998 Jul 2 05:33
tech-support_2012-07-02.0533.log.gz
-rwxrwx--- 1 root eosadmin 17996 Jul 2 05:48
tech-support_2012-07-02.0548.log.gz
-rwxrwx--- 1 root eosadmin 18024 Jul 2 06:03
tech-support_2012-07-02.0603.log.gz
-rwxrwx--- 1 root eosadmin 18005 Jul 2 06:18
tech-support_2012-07-02.0618.log.gz
-rwxrwx--- 1 root eosadmin 18034 Jul 2 06:33
tech-support_2012-07-02.0633.log.gz
-rwxrwx--- 1 root eosadmin 18026 Jul 2 06:48
tech-support_2012-07-02.0648.log.gz
-rwxrwx--- 1 root eosadmin 18040 Jul 2 07:03
tech-support_2012-07-02.0703.log.gz
-rwxrwx--- 1 root eosadmin 18035 Jul 2 07:18
tech-support_2012-07-02.0718.log.gz
-rwxrwx--- 1 root eosadmin 17999 Jul 2 07:33
tech-support_2012-07-02.0733.log.gz
-rwxrwx--- 1 root eosadmin 17999 Jul 2 07:48
tech-support_2012-07-02.0748.log.gz

Post by heasley
for XR, it summarized as follows. does this work for arista?
Index: bin/arrancid.in
===================================================================
--- bin/arrancid.in (revision 2431)
+++ bin/arrancid.in (working copy)
@@ -304,6 +304,21 @@
# persist changes constantly if you're running ntp, so
# skip its updates.
/\spersist$/ && next;
+
+ if (/.*$(\d+) bytes free$/) {
+ my($tmp) = $1;
+ if ($tmp >= (1024 * 1024 * 1024)) {
+ $tmp = int($tmp / (1024 * 1024 * 1024));
+ s/$1 bytes free/$tmp GB free/;
+ } elsif ($tmp >= (1024 * 1024)) {
+ $tmp = int($tmp / (1024 * 1024));
+ s/$1 bytes free/$tmp MB free/;
+ } else {
+ $tmp = int($tmp / 1024);
+ s/$1 bytes free/$tmp KB free/;
+ }
+ }
+
ProcessHistory("FLASH","","","!Flash: $_");
}
ProcessHistory("","","","!\n");

As discussed off list, this patch is working, with special thx to my
colleague Petr.

# cvs diff -r 1.118 -r 1.117 /var/lib/rancid/arista/configs/10.254.0.200
Index: /var/lib/rancid/arista/configs/10.254.0.200
===================================================================
RCS file: /var/lib/rancid/CVS/arista/configs/10.254.0.200,v
retrieving revision 1.118
retrieving revision 1.117
diff -r1.118 -r1.117
37c37
< !Flash: 931745792 bytes total (268541952 bytes free)
---

Post by heasley
!Flash: 931745792 bytes total (268562432 bytes free)

And here's the one with the patch applied to arrancid:

# cvs diff -r 1.122 -r 1.121 /var/lib/rancid/arista/configs/10.254.0.200
Index: /var/lib/rancid/arista/configs/10.254.0.200
===================================================================
RCS file: /var/lib/rancid/CVS/arista/configs/10.254.0.200,v
retrieving revision 1.122
retrieving revision 1.121
diff -r1.122 -r1.121
37c37
< !Flash: 931745792 bytes total (257 MB free)
---

Post by heasley
!Flash: 931745792 bytes total (258 MB free)

Rgds, Stefan