Re: [SSSD-users] sssd cache detection ?
On (30/01/15 07:33), Ash Nand wrote:
Hi there.
Does sssd export any library/function which would allow one to test if the
dataset *was* coming from a cache and NOT the real source (assuming source
outage)?
I have a LDAP backend provider here with a generous cache timeout. I was
wondering if it would be possible to tap somewhere , to achieve something
equivalent to `getent -s sss passwd xxx` but only if/when user xxx was
cached by sssd and in offline mode.
In other words detect when sssd is in offline mode, the sssd cache is
transparently servicing clients without resorting to parsing log files.
We do not have a command line utility to find out this state.
There is ticket in trac to impement it.
You can use netstat utility for such purpose as a workaround.
For demonstaration putposes I send signals to main sssd process to go offline
and then online. And you need to run netstat as a root otherwise you will not
see PID and name of sssd process (netstat -p)
[root@host ~]# netstat -tpn | grep sssd_be
tcp 0 0 10.34.129.86:56053 10.16.78.114:389 ESTABLISHED
7265/sssd_be
[root@host ~]# kill -USR1 `pgrep sssd$`
[root@host ~]# netstat -tpn | grep sssd_be
[root@host ~]# kill -USR2 `pgrep sssd$`
[root@host ~]# netstat -tpn | grep sssd_be
tcp 0 1 10.34.129.86:56055 10.16.78.114:389 SYN_SENT
7265/sssd_be
[root@host ~]# netstat -tpn | grep sssd_be
tcp 0 0 10.34.129.86:56055 10.16.78.114:389 ESTABLISHED
7265/sssd_be
HTH
LS