Re: [lxc-users] Question : duplication

[Stéphane Graber]

On Fri, Jun 08, 2018 at 12:13:34PM +0100, Thouraya TH wrote:
> Hi,
> 
> In my cluster, i have 3 containers per host  and i have 10 hosts.
> all containers are ubuntu containers.
> My question: the rootfs of these containers are the same ?
> i have duplicated files in different containers repository ?
> 
> 
> 
> Thank you so much for answers.
> Best regards.

Depends on your storage backend, all backends except the directory one
will use copy-on-write for deltas from the image used for the container
and their current state.

If using ZFS and have quite a bit of spare RAM you can also turn on
deduplication on your ZPOOL which will then deduplicate writes as they
happen, possibly saving you a lot of disk space.


-- 
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com


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Re: [lxc-users] Network instability with bridged nat and macvlan interfaces

[Jäkel , Guido]

Dear Michel,

... but the ssh connection is continous open -- before and "during" the issue?

Did you sniff (e.g. with tcpdump) the package flow on and outside (e.g. from 
your testing host)?

Guido
>-Original Message-
>From: lxc-users [mailto:lxc-users-boun...@lists.linuxcontainers.org] On Behalf 
>Of Michel Jansens
>Sent: Friday, June 08, 2018 8:58 AM
>To: LXC users mailing-list 
>Subject: Re: [lxc-users] Network instability with bridged nat and macvlan 
>interfaces
>
>
>
>Hi Guido,
>
>Thanks for your reply
>
>I’ve installed an apache2 on port 8082, and it falls at the same time as 
>haproxy ports 80 and 443. Only ssh keeps responding.
>Weird!
>
>Michel
>
>
>
>
>
>   On 8 Jun 2018, at 08:15, Jäkel, Guido   > wrote:
>
>   Dear Michel,
>
>   did you already take a look on the other parts of the involved network 
> environment? Maybe you have an issue on layer two
>vs. three concerning the MAC <-> IP correlation on the involved next upstream 
>switch. You may check the ARP tables.
>
>   And -- because you "loose" port 80 and 443, but not 22 --- as a test I 
> would arrange some other simple services (using
>another product as you use for the httpd).
>
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[lxc-users] Question : duplication

[Thouraya TH]

Hi,

In my cluster, i have 3 containers per host  and i have 10 hosts.
all containers are ubuntu containers.
My question: the rootfs of these containers are the same ?
i have duplicated files in different containers repository ?



Thank you so much for answers.
Best regards.
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Re: [lxc-users] Network instability with bridged nat and macvlan interfaces

[Michel Jansens]

Hi Guido,

Thanks for your reply

I’ve installed an apache2 on port 8082, and it falls at the same time as 
haproxy ports 80 and 443. Only ssh keeps responding. Weird!

Michel




> On 8 Jun 2018, at 08:15, Jäkel, Guido  wrote:
> 
> Dear Michel,
> 
> did you already take a look on the other parts of the involved network 
> environment? Maybe you have an issue on layer two vs. three concerning the 
> MAC <-> IP correlation on the involved next upstream switch. You may check 
> the ARP tables.
> 
> And -- because you "loose" port 80 and 443, but not 22 --- as a test I would 
> arrange some other simple services (using another product as you use for the 
> httpd).
> 





> Greetings
> 
> Guido
> 
>> -Original Message-
>> From: lxc-users [mailto:lxc-users-boun...@lists.linuxcontainers.org] On 
>> Behalf Of Michel Jansens
>> Sent: Thursday, June 07, 2018 7:36 PM
>> To: LXC users mailing-list 
>> Subject: Re: [lxc-users] Network instability with bridged nat and macvlan 
>> interfaces
>> 
>> Hi Andrey,
>> Thank you for your answer.
>> I’ll try to avoid mixing macvlan with bridging/nat to test.
>> I’m currently building the equivalent on a second server, but with a bridge 
>> built on top of the vlan.
>> Somebody at Canonical also suggested it could be the physical switch playing 
>> bad with macvlan. We’re investigating.
>> I’ll keep you informed of the evolution.
>> 
>> Cheers,
>> 
>> Michel
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Re: [lxc-users] Network instability with bridged nat and macvlan interfaces

[Jäkel , Guido]

Dear Michel,

did you already take a look on the other parts of the involved network 
environment? Maybe you have an issue on layer two vs. three concerning the MAC 
<-> IP correlation on the involved next upstream switch. You may check the ARP 
tables.

And -- because you "loose" port 80 and 443, but not 22 --- as a test I would 
arrange some other simple services (using another product as you use for the 
httpd).

Greetings

Guido

>-Original Message-
>From: lxc-users [mailto:lxc-users-boun...@lists.linuxcontainers.org] On Behalf 
>Of Michel Jansens
>Sent: Thursday, June 07, 2018 7:36 PM
>To: LXC users mailing-list 
>Subject: Re: [lxc-users] Network instability with bridged nat and macvlan 
>interfaces
>
>Hi Andrey,
>Thank you for your answer.
>I’ll try to avoid mixing macvlan with bridging/nat to test.
>I’m currently building the equivalent on a second server, but with a bridge 
>built on top of the vlan.
>Somebody at Canonical also suggested it could be the physical switch playing 
>bad with macvlan. We’re investigating.
>I’ll keep you informed of the evolution.
>
>Cheers,
>
>Michel
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