User talk:Jch: Difference between revisions
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== My laptop setup == | == My laptop setup == | ||
=== First try with USB stick in run-from-ram mode === | |||
After having migrating nearly all my server boxes from Debian to Alpine, it's about time to migrate my laptop (desktop will be last). | After having migrating nearly all my server boxes from Debian to Alpine, it's about time to migrate my laptop (desktop will be last). | ||
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Now the '''sound'''... I want to produce the sound inside the KVM-desktop but to play it on baremetal hardware. <br/> | Now the '''sound'''... I want to produce the sound inside the KVM-desktop but to play it on baremetal hardware. <br/> | ||
I have read that it is possible to deactivate the control of some PCI device on the host and offer it as pass-trough to a guest KVM... | I have read that it is possible to deactivate the control of some PCI device on the host and offer it as pass-trough to a guest KVM... | ||
=== Going to the HDD === | |||
Revision as of 07:52, 3 June 2015
How to automate KVM creation
How to emulate USB stick with KVM.
Starting_AL_from_network
How to set up a PXE environement.
Building_a_complete_infrastucture_with_AL
From first repo (boot media):
AlpineLinux dhcpd tftp-hpa syslinux mkinitfs nfs-utils darkhttpd rsync openssh openvswitch screen qemu-system-X86_64 qemu-img gptfdisk parted mdadm lvm2 nbd xfsprogs e2fsprogs multipath consul dnsmasq vim collectd collectd-network git syslog-ng envconsul consul-template xnbd ceph lxc lxc-templates xfsprogs gptfdisk e2fsprogs multipath wipe tcpdump curl openvpn fsconsul
and all dependecies...
will build a custom ISO with that list...
About NFS
NFS is now working with AL. Both as server and client with the nfs-utils package.
However, to use NFS as client in some LXC does not seems to work yet as shown below
nfstest:~# mount -t nfs -o ro 192.168.1.149:/srv/boot/alpine /mnt mount.nfs: Operation not permitted mount: permission denied (are you root?) nfstest:~# tail /var/log/messages Apr 4 10:05:59 nfstest daemon.notice rpc.statd[431]: Version 1.3.1 starting Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Flags: TI-RPC Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Failed to read /var/lib/nfs/state: Address in use Apr 4 10:05:59 nfstest daemon.notice rpc.statd[431]: Initializing NSM state Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Failed to write NSM state number: Operation not permitted Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Running as root. chown /var/lib/nfs to choose different user nfstest:~# ls -l /var/lib/nfs total 12 -rw-r--r-- 1 root root 0 Nov 10 15:43 etab -rw-r--r-- 1 root root 0 Nov 10 15:43 rmtab drwx------ 2 nobody root 4096 Apr 4 10:05 sm drwx------ 2 nobody root 4096 Apr 4 10:05 sm.bak -rw-r--r-- 1 root root 4 Apr 4 10:05 state -rw-r--r-- 1 root root 0 Nov 10 15:43 xtab
msg from ncopa """ dmesg should tell you that grsecurity tries to prevent you to do this.
grsecurity does not permit the syscall mount from within a chroot since that is a way to break out of a chroot. This affects lxc containers too.
I would recommend that you do the mouting from the lxc host in the container config with lxc.mount.entry or similar.
https://linuxcontainers.org/lxc/manpages/man5/lxc.container.conf.5.html#lbAR
If you still want disable mount protection in grsecurity then you can do that with: echo 0 > /proc/sys/kernel/grsecurity/chroot_deny_mount """
this is not working with
lxc.mount.entry=nfsserver:/srv/boot/alpine mnt nfs nosuid,intr 0 0
on the host machine with all nfs modules and helper software installed and loaded.
backend:~# lxc-start -n nfstest lxc-start: conf.c: mount_entry: 2049 Invalid argument - failed to mount 'nfsserver:/srv/boot/alpine' on '/usr/lib/lxc/rootfs/mnt' lxc-start: conf.c: lxc_setup: 4163 failed to setup the mount entries for 'nfstest' lxc-start: start.c: do_start: 688 failed to setup the container lxc-start: sync.c: __sync_wait: 51 invalid sequence number 1. expected 2 lxc-start: start.c: __lxc_start: 1080 failed to spawn 'nfstest'
Nor with
echo 0 > /proc/sys/kernel/grsecurity/chroot_deny_mount
on the host machine with all nfs modules and helper software installed and loaded which does'nt work either.
To find a proper way to use NFS shares from AL LXC is an important topic in order to be able to, for instance, load balance web servers sharing contents uploaded by users.
Next step will be to have HA for the NFS server itself (with only AL machines).
About NBD
NBD is now in edge/testing thanks to clandmeter.
I cannot test it properly at the moment because all the machine are busy in prod. and this package allows newstyle only. I'm waiting my new lab machine...
We still miss xnbd fot it's proxy features allowing live migration.
We are very exited by xnbd capacities!
Will be avid tester!
Also we are still looking after the right solution to backup NBD as a whole (versus by it's content) while in use. dd|nc is the used way nowadays.
New_lab_machine
My new lab machine ;)
still waiting :(
About consul
nothing yet but big hopes ^^
I'm lurking IRC about it ;)
We plan to use it's dynamic DNS feature, it's hosts listing, services inventory, events, k/v store...
and even semi high-availability for our PXE infrastructure the consul leader being the active PXEserver and other consul server are dormant PXEservers.
All config scripts adapted to pull values out of consul k/v datastore based on profiles found out of consul various lists.
As the key for dhcpd and PXEboot is the hwaddr, it will become our uuid for LAN and consul too.
We are very exited by consul capacities!
Will be avid tester!
Open questions:
- What memory footprint is needed?
- What about dynamycally adapt quorum size?
- Are checks possible triggers?
consul watch -prefix type -name name /path/to/executable
consul event [options] -name name [payload]
- What best practice to store etc configurations?
log of experimentation at User_talk:Jch/consul
About CEPH
CEPH is supposed to sovle the problem of high availability for the data stores, be it block devices (disks) or character devices (files).
The actual situation is not satisfactory.
We are very exited by CEPH capacities!
Will be avid tester!
About Docker
not a lot of information on the Docker page yet ...
About E-MailRelay
E-MailRelay is a simple SMTP proxy and store-and-forward message transfer agent (MTA).
See http://emailrelay.sourceforge.net/
It compiles fine on AL.
apk update apk add subversion alpine-sdk svn checkout svn://svn.code.sf.net/p/emailrelay/code/trunk emailrelay-code cd emailrelay-code ./configure --prefix=/usr make make install apk del subversion alpine-sdk apk add libgcc libstdc++ emailrelay --help
But I still have issues to properly build a package because it wants to install some stuff in <PREFIX>/libexec...
(And I also need to separate -doc, -test, -extra and optionnaly -gui in subpackages I guess)
About X2Go
x2goserver
I did prepare x2goserver and nx-libs packages.
x2goclient
lrelease-qt4 x2goclient.pro /bin/bash: lrelease-qt4: command not found Makefile:39: recipe for target 'build_client' failed
Dunno where to find that...
My laptop setup
First try with USB stick in run-from-ram mode
After having migrating nearly all my server boxes from Debian to Alpine, it's about time to migrate my laptop (desktop will be last).
It his relly cool to prepare the setup on USB stick preparing an apkovl. It keeps the environnement with no pollution; no history, no temporary files,
At the end it could be pushed as kind of sys install (more later on the topic).
I want it to run-from-ram as from an USB stick but from the first partition.
It will need to run X (not wayland as I plan to make eavy usage of remote X of both full desktops and applications).
It will need to have good sound support with network support (jack? pulse-audio?).
For now I'm struggling with the basic sound system :( This has always been my weakiest point with Linux. :/
Unfortunately there is nothing about setting up sound in this wiki :(/
Lucky me, my sound card is automatically installed at boot time ("lsmod|grep snd" shows several lines of info). I just apk add alsa-utils then ran alsamixer to un-mute the speaker and it just works! (tested with aplay /usr/share/sound/alsa/Noise.wav)
My laptop has an ethernet card and a wifi one. On normal use, I will not use both at the same time. But I want to have an automatic selection based on what network is available and only eth0 if both are. As I will make heavy use of VM and containers on that machine, I want some unified interface to expose to the VMs. Therefore I install openvswitch; define an OVS called wan; connect both eth0 and wlan0 to the switch wan. For now, I have in
Contents of /etc/network/interfaces
With it wlan0 is started before eth0. If eth0 is then fired, wlan0 is taken down. And wan just needs one of them to provide a link.
Now I need to fire "ifup eth0" and "ifdown eth0" automatically when the ethernet link becomes active or inactive... normally the allow-hotplug stanza should do ther trick but it seems that the event is not fired by the kernel if the link is not set...
The pre-up stanza is to be able to catch the kernel event. It works as expected at boot time. rc-service networking start sets lo wlan0 and wan up. The kernel set eth0 up when connected, down when disconnected.
But wan is not updated on eth0 link change. ifdown wan should be issued iif needed. And ifup wan everytime eth0 change state.
Also I need to restart the dhcp client on wan on link change on eth0 . And to restart openvpn.* daemons...
We need to fire an event (script) on eth0 link state changes!
To (re)start the dhcp client on wan and to restart openvpn.*...
Others exposed services should listen to 0.0.0.0 on wan interface and not be affected by the change.
I tried with a script called with a up stanza. To no result.
To launch the script manually does the trick for now.
setup-xorg-base
At this moment
Contents of /etc/apk/world
Later on, the DE and applications will be accessed remotely over the network from inside a bunch of KVM and LXC (services in KVM are exposed from LXC whenever possible (notable exception: nfs)).
- baremetal : openvswitch;irqbalance;screen;qemu;xorg;alsa
- KVM-router : iptables/openvpn/dnsmasq/ntpd/emailrelay+postfix/proxy soks (TOR)
- KVM-SAN-NAS : lvm2+nbd-server;ssh;nfs;samba;darkhttpd;tftp;rsync;syslog-ng;collectd (AL local repo)
- KVM-Desktop : xorg (X; cups); DE; cryptsetup
- KVM-proxy : squid+privoxy
For details on individual packages, please refer to relevant pages elsewhere in this wiki.
For details on how to run the KVM in run-from-ram mode with specific apkovl see Running_Alpine_in_Qemu_Live_mode.
Start X on bare-metal against KVM-desktop.
Xorg -query KVM-desktop
Now is time to wipe the current install from disk to follow http://it-offshore.co.uk/downloads/setup-lvm and adapt it a little bit to use setup-bootable instead of setup-disk sys. At this stage it's working and had good performances while running. But the boot sequence from an USB2.0 stick is awfull. Hope to improve it a lot when I will setup-bootable it to the laptop's hdd... But I first want to be 100% happy withe the architectural and functionnal aspects before trying to optimize the boot sequence.
Now the sound... I want to produce the sound inside the KVM-desktop but to play it on baremetal hardware.
I have read that it is possible to deactivate the control of some PCI device on the host and offer it as pass-trough to a guest KVM...