Hi Mike:
Just a heads up that stopping the open-iscsi iscsid daemon using systemd
doesn't seem to be working correctly, at least not on SUSE SLE 12.
When I have one or more sessions present, and their startup value is set to
"manual", when I try to stop the iscsid service, I get:
# systemctl stop iscsid.service
Job for iscsid.service canceled.
And a "ps" shows that iscsid is still running, but under a new process id.
And, at times, I see that "iscsiadm -k 0 2" is hung.
Note that my systemd iscsid.service unit file looks like:
[Unit]
Description=Open-iSCSI
Documentation=man:iscsid(8) man:iscsiuio(8) man:iscsiadm(8)
DefaultDependencies=no
After=network.target iscsiuio.service
Before=remote-fs-pre.target
[Service]
Type=simple
ExecStart=/sbin/iscsid -f
ExecStop=/sbin/iscsiadm -k 0 2
[Install]
WantedBy=multi-user.target
Also=iscsid.socket
While trying to track down this problem, I found a couple of issues:
1. I don't know what the "2" is on the "iscsiadm -k 0 2" is for. I see that
command in systemd unit file in your master branch, and I see that other
distributions use that, but the "2" seems to be ignored.
2. It looks like the "iscsiadm -k 0" is stopping the iscsi daemon, but that
systemd is restarting it! I'm guessing this because (a) I get the
"cancelled" message, and (b) iscsid is still running, but as a new process,
i.e. it's been restarted.
I thought perhaps the problem was related to running iscsid as a "simple"
service, in the foreground, but changing Type to forking and removing the
"-f" from the iscsid command line did not change anything.
Then I simply commented out the "ExecStop" line, and iscsid now shutdowns
correctly. This, I believe, is because systemd is shutting it down by
sending first SIGHUP then SIGKILL, as per "man systemd.kill".
Before I comment out the "ExecStop=" for all SLE 12 users, I wondered if
you've heard of any problems along these lines.
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