[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Michael Hudson-Doyle]

** Package changed: subiquity (Ubuntu) => subiquity

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Title:
  Snappy should detect when running in KVM, specify correct ssh
  connection line

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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Simos Xenitellis ]

The goal of this report is to deal with the usability issue. The issue
that when you start Ubuntu Core through KVM, you do not get a working
command on how to connect to the running image.

A simple solution could be to adapt the text on #1 to say something
like:


    can connect remotely to this device via SSH:
   
   ssh you@10.0.15.1(if running on standalone 
device)
   ssh you@localhost(if running through KVM)


If KVM guests are not expected to be very common, then no change would be 
necessary. Any instructions that describe  how to boot into KVM, should have 
the additional information on how to connect with SSH.

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Title:
  Snappy should detect when running in KVM, specify correct ssh
  connection line

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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Michael Hudson-Doyle]

Setting to incomplete as the is certainly no consensus about what to do
here. Maybe nothing?

** Changed in: subiquity (Ubuntu)
   Status: Triaged => Incomplete

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Steve Langasek]

Detecting that you're in KVM is definitely not the same thing as
detecting that port redirection is in use.

I don't launch my KVM guests from the commandline using redir, I launch
them under libvirt virt virt-manager, and the current instructions are
correct for me...

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  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Oliver Grawert]

btw, using systemd-detect-virt might be the best way forward for detecting if 
we are in a VM ... 
also, since snappy final freeze is today, is this still on the radar for being 
fixed ?

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Michael Hudson-Doyle]

Well you seem to have much stronger opinions than me!

** Changed in: subiquity (Ubuntu)
 Assignee: Michael Hudson-Doyle (mwhudson) => (unassigned)

** Changed in: subiquity (Ubuntu)
 Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Mathieu Trudel-Lapierre]

Assigned to Michael since he has already started working on this...

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Mathieu Trudel-Lapierre]

I strongly disagree with displaying this. It seems extremely clunky: why
display addresses and then mention they are wrong? Plus it's not
impossible that the setup is done "on purpose", and that the users have
configured their host appropriately to access the system with whatever
access is provided, even with user-mode networking.

Rather than doing this, I would support either doing better detection
that permits us to make sure the IP addresses would be wrong (which
seems fraught with peril too), or leave it to users to know what they
are doing.

An elegant solution might be to always display the ssh line for
user@hostname, and expect that users will pick that first, or display
user@hostname, and list "configured IP addresses" after that (without
the ssh line), so that if access via the hostname doesn't work, then one
of the IPs might.

** Changed in: subiquity (Ubuntu)
   Status: New => Triaged

** Changed in: subiquity (Ubuntu)
   Importance: Undecided => Medium

** Changed in: subiquity (Ubuntu)
 Assignee: (unassigned) => Michael Hudson-Doyle (mwhudson)

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Title:
  Snappy should detect when running in KVM, specify correct ssh
  connection line

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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Oliver Grawert]

well, i'm kind of assuming the user follows the snappy instructions at 
https://developer.ubuntu.com/en/snappy/start/#snappy-local

but indeed if you use complex commandlines for kvm and set up bridge
networking you might end up with different ways to ssh in ... perhaps we
need a full paragraph explaining it ... though this might become tricky
in 80x24 ...

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Ryan Harper]

It's specific to using qemu's userspace networking (-net user) and and
using qemu's tcp redir to map the in-guest port 22 to the host.

http://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29

I don't think we always want to key off of QEMU cpu string;
It's possible for someone to boot this image with bridged 
networking and then the UI wouldn't be right either.

To detect default -net user configs, maybe a combination of the
DHCP server IP (10.0.2.2) and lack of ICMP response?

% ping -w 1 -c1 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.

--- 8.8.8.8 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999ms

% echo $?
1

http://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29


If present, this tells you the virt type:

$ systemd-detect-virt 
qemu

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Title:
  Snappy should detect when running in KVM, specify correct ssh
  connection line

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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Oliver Grawert]

the wording should actually mention that you most likely "need to use
"$USER@localhost" with the right port" (i sadly doubt it is possible to
get the port redirect from within the running VM so we can not show that
bit, but probably explain it)

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Title:
  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Michael Hudson-Doyle]

Do you just mean looking for "QEMU Virtual CPU version" in cpuinfo?
Something like https://github.com/CanonicalLtd/subiquity/pull/166
(suggestions for better wording gratefully received).

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  Snappy should detect when running in KVM, specify correct ssh
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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Michael Hudson-Doyle]

This is kinda specific to user networking in KVM isn't it? I guess we
can detect KVM we could can include some alternative suggestions...

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Title:
  Snappy should detect when running in KVM, specify correct ssh
  connection line

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[Bug 1621550] Re: Snappy should detect when running in KVM, specify correct ssh connection line

[Oliver Grawert]

adding a task for subiquity since this is a UI issue, detection if being
in kvm can be done via data from /proc/cpuinfo

** Also affects: subiquity (Ubuntu)
   Importance: Undecided
   Status: New

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  Snappy should detect when running in KVM, specify correct ssh
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