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   January 22, 2017  
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[01:01:49] <ShalokShalom> hi there
[01:02:21] <ShalokShalom> a guy in our channel is asking, if anybody like to host their OS in the mirror of princeton university
[01:02:25] <ShalokShalom> http://mirror.math.princeton.edu/pub/
[01:02:28] <ShalokShalom> interested?
[01:04:41] <ShalokShalom> is there a rsync host?
[01:09:42] <wiedi_> there is for the pkgsrc packages: rsync://pkgsrc-us-east-1.joyent.com/pkgsrc-joyent/packages/ - not sure about the platform images
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[03:26:38] <nahamu> rmustacc: /etc/power.conf appears identical in the "misbehaving" OmniOS VM and in my SmartOS GZ.
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[11:57:13] <sjorge> rmustacc: how would I figure out why a USB3 device shows up fine if i plug it in after boot but not when it is plugged in during boot?
[11:57:34] <sjorge> Any paticular output you need?
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[12:54:33] <homelab> Hey
[12:54:51] <homelab> Is X9DRD-7LN4F-JBOD fully compateble with smart os?
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[14:31:53] <tat-> any tips for tuning/debugging the tcp stack on smartos? iperf GZ -> remote linux machine (1Gbit connection, ~8ms RTT) gives me ~50Mbit, while the same test on a Linux VM in KVM (on smartos) runs at ~600Mbit
[14:32:29] <tat-> I see similar numbers when transferring files over sftp
[14:38:25] <nbjoerg> and in the reverse direction?
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[14:43:23] <tat-> in the reverse direction the perfomance is pretty much the same in the GZ and on KVM, about ~300Mbit
[14:44:20] <nbjoerg> I'm not completely sure, but it seems the default window limits are different for send and recv?
[14:45:33] <nbjoerg> compare "ndd -get /dev/tcp tcp_xmit_hiwat" and "ndd -get /dev/tcp tcp_recv_hiwat"
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[15:01:01] <tat-> you're right. 128000 vs 1048576
[15:01:27] <nbjoerg> test increasing the former to the value of the later
[15:01:54] <nbjoerg> you might also in general want to raise tcp_max_buf -- GigE with RTT of 8ms is about the limit of a 1MB buffer
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[15:10:51] <tat-> hm. after adjusting tcp_xmit_hiwat to 1048576 it starts off at a higher rate (~150Mbit), but quickly goes down to ~50Mbit.
[15:14:58] <nbjoerg> are you sure that your link is not contended then?
[15:15:54] <nbjoerg> any fancy MSS handling?
[15:16:04] <nbjoerg> there are a couple of possible reasons
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[15:19:40] <tat-> I'm pretty sure it's not the link, as I'm able to push ~600Mbit from a Linux VM running in the GZ where I'm testing from
[15:20:29] <tat-> and it should't be any MSS handling for IPv4-traffic
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[15:25:01] <tat-> removed the mss clamping that I've enabled for my IPv6-tunnel just to make sure. that didn't change anything.
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[16:06:16] <Aquatique> howdy
[16:06:48] <Aquatique> got stuck into strange gotchas with sata drives (all are offline)
[16:07:26] <Aquatique> with luxadm being stripped of SmartOS %)
[16:13:06] <Aquatique> and of course I've got "sata:sata_auto_online=1" in /etc/system override
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[19:53:37] <jzu_> by the way, if I create a instance with just only fabric IP the only way to access it is through some instance that has also public/external IP, right? :)
[19:54:00] <jzu_> (if it's native container or KVM, Docker you can access using $ docker exec)
[19:55:06] <bennabiy> what would be the cause of being able to ssh only through my GZ to a KVM, but not through the WAN (when I was able to)
[19:55:55] <jzu_> routes not being correctly set?
[19:56:06] <bennabiy> that is my guess
[19:56:24] <bennabiy> but I cannot see where the routes are failing.
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[20:00:37] <bennabiy> Any thoughts on how to test it. My router shows that the ports are being hit, but no response from the server
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[20:22:37] <rmustacc> sjorge: I'm not entirely sure. Can you file a bug on github.com/joyent/smartos-live/issues, and we'll use that to track this, so this isn't just IRC pings that may get lost?
[20:51:08] <bennabiy> rmustacc: is it possible that something in the GZ would be blocking access to the networking stack within a kvm instance?
[20:51:30] <rmustacc> Not that I can think of off hand.
[20:51:40] <bennabiy> I can ssh from the GZ to the kvm, but not from outside the LAN, but it was working before
[20:51:44] <rmustacc> Whenever this thing happens, I'd focus on pinging the gateway and seeing the last place you lose a packet.
[20:51:53] <rmustacc> From within the KVM guest.
[20:52:14] <bennabiy> from within the KVM I am fine, it is trying to reach it from the outside
[20:52:22] <rmustacc> Then use snoop -z <zone> -d <dev> to check for where things are getting dropped.
[20:52:39] <bennabiy> from the GZ correct?
[20:52:47] <rmustacc> Well, the first question to ask is are you getting packets from the router?
[20:53:09] <bennabiy> I see packets hitting both my firewall rule, and the nat
[20:53:17] <bennabiy> as far as logging,
[20:53:29] <rmustacc> Sure, but do they make it to the physical nic or not.
[20:53:31] <rmustacc> That's question one.
[20:53:36] <bennabiy> good question
[20:53:41] <bennabiy> It is not seeming it
[20:53:44] <rmustacc> Well, maybe question two. Question one may be do they make it to the vnic.
[20:54:05] <rmustacc> So, do something like snoop -r -d <device vnic is over> icmp
[20:54:18] <rmustacc> And see if you see ICMP requests from outside the gateway make it there.
[20:54:53] <bennabiy> for device, would I list the name (like admin) or the interface?
[20:55:29] <rmustacc> The interface.
[20:55:35] <rmustacc> So, something like igb1, etc.
[20:55:43] <rmustacc> (The things that show up in dladm show-phys)
[20:55:48] <bennabiy> yes
[20:56:13] <bennabiy> now, I do not allow icmp through the firewall right now...
[20:56:18] <bennabiy> so that might not show me what I need
[20:56:23] <rmustacc> OK.
[20:56:38] <rmustacc> I'd recommend enabling ICMP as that's simpler to troubleshoot than everything else.
[20:56:50] <rmustacc> (The regular once a second packet makes it easy to see whether or not it's going or getting a reply)
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[21:31:15] <bennabiy> rmustacc: so stuff is hitting on other ports just not ssh
[21:31:25] <bennabiy> I can watch the traffic making it to it
[21:31:29] <bennabiy> through snoop
[21:31:43] <bennabiy> imap is working, http is working
[21:32:54] <rmustacc> bennabiy: So if you snoop -z <zone> -d <dev> port 22
[21:33:03] <rmustacc> Do you see traffic going on the vnic?
[21:33:13] <bennabiy> one moment, rebooting the router
[21:33:35] <nbjoerg> please, never completely block icmp
[21:33:46] <nbjoerg> rate limit it or whatever, but don't just completely block it
[21:38:19] <bennabiy> I wish snoop had autocomplete for uuid of zone
[21:38:32] <bennabiy> also, I get cannot open device
[21:38:41] <bennabiy> or DLPI link does not exist
[21:40:09] <bennabiy> rmustacc: ^
[21:40:43] <bennabiy> I guess that the device in this case is within the zone, correct?
[21:40:58] <rmustacc> It is, so if it was zone foo and net0, you'd use -z foo -d net0
[21:41:04] <bennabiy> yes
[21:41:11] <bennabiy> DLPI link fors not exist
[21:41:20] <bennabiy> fors=does
[21:41:34] <bennabiy> My fingers speak other languages occasionally
[21:41:37] <rmustacc> Is the zone running and are you sure you have the right zone and name?
[21:41:41] <bennabiy> yes
[21:41:47] <bennabiy> I just sshed into it
[21:41:50] <rmustacc> You should be able to confirm with something like dladm show-vnic -z <zone<
[21:41:54] <rmustacc> *zone>
[21:42:27] <bennabiy> use the link name ?
[21:43:17] <bennabiy> it worked using the link name
[21:43:28] <bennabiy> sorry, I thought it was the device from within the KVM
[21:43:35] <bennabiy> ok, so watching it
[21:44:30] <bennabiy> nothing
[21:46:00] <bennabiy> Is it possible the ARP cache is poisoned?
[21:46:47] <rmustacc> Well, you said http traffic reaches it from the same source, right?
[21:46:54] <bennabiy> yes
[21:47:06] <bennabiy> everything else reaches it, but not ssh
[21:47:12] <bennabiy> but ssh reaches it from the gz
[21:47:44] <bennabiy> I can access webmail from it, and it works, and I can connect to the IMAP directly
[21:48:18] <bennabiy> rebooting the vm, see if that does it
[21:48:34] <rmustacc> Well, if we're not seeing the packets there, I'd check to see if the physical device sees it.
[21:48:44] <rmustacc> And if it doesn't, then something else in the path on the network is causing it.
[21:49:08] <rmustacc> At least, from the perspective of the most likely culprit.
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[21:50:29] <bennabiy> bah, it is working now
[21:50:39] * bennabiy sighs
[21:50:53] <bennabiy> thank you for the troubleshooting tips... I did not know about snoop
[22:09:09] <simmel> I only had one drive in my smartos machine when I created my zone pool. How can I add another disk to it? Just `zpool add zones c1t0d1`?
[22:10:37] <nahamu> simmel: do you want to mirror the drives?
[22:10:51] <nahamu> you'd want "zpool attach" if so.
[22:12:17] <simmel> nahamu: Yes, I want the two disks to become a mirror. Thank you! I'll read the man-page on attach.
[22:12:28] <nbjoerg> would it be possible get something like "vmadm start -C $uuid"?
[22:12:45] <nbjoerg> similar to xen's option, i.e. start and attach to console
[22:14:07] <simmel> nahamu: Do I have to prepar my new disk in any way? The disk is currently in a softraid in OS X = ) dd over the first KB with zeroes?
[22:15:36] <bennabiy> what is the best way to back up a zone or kvm ?
[22:16:15] <nahamu> nbjoerg: I just "vmadm start <uuid> ; vmadm console <uuid>" on a single line.
[22:16:42] <nbjoerg> nahamu: the xen command ensures that all serial output is visible
[22:16:44] <nahamu> simmel: you shouldn't need to.
[22:16:49] <nbjoerg> I'm not sure if vmadm console provides that?
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[22:17:11] <simmel> nahamu: cool, thank you again!
[22:17:24] <nahamu> nbjoerg: in theory you might be able to miss something. in practice I don't think it's ever been a problem for me.
[22:18:33] <nahamu> nbjoerg: is it safe to assume you're talking about a KVM virtual machine?
[22:18:55] <nbjoerg> yes
[22:20:09] <nahamu> do you only need to capture it read-only or do you need read/write access to the serial conolse?
[22:20:28] <nbjoerg> rw
[22:21:13] <nahamu> just how fast does your VM start writing to the serial port (and can you introduce a delay long enough to prevent data loss)?
[22:21:45] <nahamu> For example, I've tweaked illumos distros as guests to render grub on the serial port.
[22:21:59] <nahamu> with the "vmadm start ; vmadm console" I've never missed grub rendering.
[22:23:06] <nbjoerg> the boot loader appears very fast :)
[22:23:11] <nahamu> which means that you could probably write enough javascript to implement the "-C" flag at that level to run the function that connects to the console immediately after the one that starts the vm.
[22:23:12] <rmustacc> It would be nice to have, but it doesn't exist today.
[22:23:21] <rmustacc> Probably need to coordinate with QEMU a bit.
[22:23:45] <nahamu> yeah, if your VM is "too fast" I agree with rmustacc that more coordination with QEMU would be needed.
[22:24:10] <nahamu> nbjoerg: is the guest netbsd or something more exotic?
[22:25:00] <nbjoerg> no, netbsd
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[22:31:16] <nahamu> can you stick a delay in the boot loader to give you a little more time to connect?
[22:32:06] <nbjoerg> not before it shows the boot menu at least
[22:32:36] <nbjoerg> did I mention lofs support for kvm as desirable? :)
[22:33:03] <LeftWing> You mean... being able to mount files inside the KVM guest?
[22:33:48] <nbjoerg> not the kvm guest
[22:33:53] <nbjoerg> but qemu
[22:33:59] <nbjoerg> consider ISO images
[22:34:19] <nbjoerg> at the moment, you have to copy them into /zones/$uuid/root
[22:34:35] <nbjoerg> or you have to semi-permanently configure them as disks
[22:34:37] <LeftWing> Ahhh
[22:34:49] <nbjoerg> (and have them as zvol)
[22:35:33] <LeftWing> Yes, I suppose that would be quite helpful
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[22:38:54] <arekinath> we could implement the crazy p9fs via virtio thing ;)
[22:58:02] <nahamu> I think you can already lofs mount in ISOs. Have you tried?
[22:58:16] <nahamu> does the KVM brand not respect "filesystems" ?
[22:58:35] <nbjoerg> I don't think it does
[22:58:47] <nahamu> have you tried?
[22:58:51] <nbjoerg> I tried to use it but failed. granted, it's been a while
[23:00:04] <nahamu> I'll poke that later.
[23:00:10] * nahamu going afk
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[23:05:37] <simmel> nahamu: Sweet! attache worked well, I had to use -f since it had an existing filesystem/layout. Now resilvering. Thanks!
[23:11:15] <simmel> Uh.. Is there a better way to reboot(1) or poweroff(1) your SmartOS machine? LX and KVM kind doesn't like them. I had to force stop my LX's and start them again.
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   January 22, 2017  
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