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| =How to automate KVM creation= | | == [[User_talk:Jch/How to automate KVM creation|How to automate KVM creation]] == |
| | How to emulate USB stick with KVM. |
|
| |
|
| The goal is not only to have a working install but to have it at the after setup-alpine stage without human intervention...
| | == [[User_talk:Jch/Starting_AL_from_network|Starting_AL_from_network]] == |
| Tis is the first stages of a work in progress...
| | How to set up a PXE environement. |
|
| |
|
| I want to pass a Block Device and a name as parameters. The block device could be an image file, a LV, a NBD, a hdd, a raid array, whatever.<br/>
| | == [[User_talk:Jch/Building_a_complete_infrastucture_with_AL|Building_a_complete_infrastucture_with_AL]] == |
| Everything else should be fully automatic according to some config file (stating the http-proxy, the time server, the log server, ...).
| |
|
| |
|
| The I will just run the script, watch my dhcp logs to discover the new IP assigned (that's why the name is a parameter), then log in with ssh without password to customize it further but at high level only (will be a robot and not me in fact).
| | <u>From first repo</u> (boot media): |
|
| |
|
| I guess it would be something like emulate boot from usb key with specific overlay already on key... <br/>
| | 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 <s>envconsul</s> <s>consul-template</s> <s>xnbd</s> <s>ceph</s> lxc lxc-templates xfsprogs gptfdisk e2fsprogs multipath wipe tcpdump curl openvpn <s>fsconsul</s> |
| then run setup-disk with proper parameters on the command line to avoid the interactive process (like setup-alpine does)... <br/>
| |
| Methink this could be done from a couple of scripts put in /etc/local.d/. The last.stop one deleting all of them to be clean at next reboot.<br/>
| |
| Let's start easy ;)
| |
|
| |
|
| == How to prepare a img file to emulate an USB key ==
| | and all dependecies... |
|
| |
|
| first a working example done in console (accessed trough ssh).<br/>
| | will [[How_to_make_a_custom_ISO_image|build a custom ISO]] with that list... |
| Will build a script from it...
| |
|
| |
|
| First, lets's prepare somme block device (here an image file but could be something else) <pre>
| | == About NFS == |
| apk add qemu-img
| |
| qemu-img create -f raw usbkey.img 512M
| |
| apk del qemu-img
| |
| T="usbkey.img"
| |
| </pre>
| |
|
| |
|
| Next, let's install AL on this $T <pre>
| | NFS is now working with AL. Both as server and client with the nfs-utils package.<br/> |
| apk add multipath-tools syslinux dosfstools
| | However, to use NFS as client in some LXC does not seems to work yet as shown below |
| fdisk $T
| | <pre> |
| kpartx -av $T
| | nfstest:~# mount -t nfs -o ro 192.168.1.149:/srv/boot/alpine /mnt |
| mkdosfs -F32 /dev/mapper/loop1p1
| | mount.nfs: Operation not permitted |
| dd if=/usr/share/syslinux/mbr.bin of=/dev/mapper/loop1
| | mount: permission denied (are you root?) |
| syslinux /dev/mapper/loop1p1
| | nfstest:~# tail /var/log/messages |
| mkdir key
| | Apr 4 10:05:59 nfstest daemon.notice rpc.statd[431]: Version 1.3.1 starting |
| mount -t vfat /dev/mapper/loop1p1 key | | Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Flags: TI-RPC |
| wget http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.1/releases/x86_64/alpine-mini-3.1.1-x86_64.iso
| | Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Failed to read /var/lib/nfs/state: Address in use |
| mkdir cdrom
| | Apr 4 10:05:59 nfstest daemon.notice rpc.statd[431]: Initializing NSM state |
| mount alpine-mini-3.1.1-x86_64.iso cdrom
| | Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Failed to write NSM state number: Operation not permitted |
| cd cdrom
| | Apr 4 10:05:59 nfstest daemon.warn rpc.statd[431]: Running as root. chown /var/lib/nfs to choose different user |
| cp -a .alpine-release * ../key/
| | nfstest:~# ls -l /var/lib/nfs |
| cd ..
| | total 12 |
| umount key
| | -rw-r--r-- 1 root root 0 Nov 10 15:43 etab |
| umount cdrom
| | -rw-r--r-- 1 root root 0 Nov 10 15:43 rmtab |
| kpartx -d $T
| | drwx------ 2 nobody root 4096 Apr 4 10:05 sm |
| apk del multipath-tools syslinux dosfstools
| | drwx------ 2 nobody root 4096 Apr 4 10:05 sm.bak |
| rm alpine-mini-3.1.1-x86_64.iso
| | -rw-r--r-- 1 root root 4 Apr 4 10:05 state |
| | -rw-r--r-- 1 root root 0 Nov 10 15:43 xtab |
| </pre> | | </pre> |
|
| |
|
| This block device may now be use to boot some KVM for instance like: <pre>
| | msg from ncopa """ |
| screen -d -m -S KVM-builder \
| | dmesg should tell you that grsecurity tries to prevent you to do this. |
| qemu-system-x86_64 -name KVM-usb -enable-kvm -cpu qemu64 -curses \
| |
| -device nec-usb-xhci -drive if=none,id=usbstick,file=$T -device usb-storage,drive=usbstick
| |
| </pre> This is working fine.
| |
| | |
| The problem is when adding a HDD to the lot, qemu try to boot from the hdd and does not even try to boot from the usb key. Enabling menu in boot let's one access the emulated bios which allows to select USB device to boot interactively but this break the goal of fully automated boot :( The stanza is for instance <pre>
| |
| screen -d -m -S KVM-builder \
| |
| qemu-system-x86_64 -name KVM-usb -enable-kvm -cpu qemu64 -curses \
| |
| -device nec-usb-xhci -drive if=none,id=usbstick,file=$T -device usb-storage,drive=usbstick \
| |
| -drive file=$T2 boot menu=on
| |
| </pre>
| |
|
| |
|
| qemu-doc states that very clearly:<br/>
| | grsecurity does not permit the syscall mount from within a chroot since |
| > -boot [order=drives][,once=drives][,menu=on|off][,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_timeout][,strict=on|off]<br/>
| | that is a way to break out of a chroot. This affects lxc containers too. |
| > Specify boot order drives as a string of drive letters. Valid drive letters depend on the target achitecture. The x86 PC uses: a, b (floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot from network adapter 1-4), hard disk boot is the default
| |
|
| |
|
| =Starting AL from network=
| | I would recommend that you do the mouting from the lxc host in the |
| | container config with lxc.mount.entry or similar. |
|
| |
|
| As it does not seems possible to start qemu with a virtual USB key *and* a virtual HDD attached to the VM. Let's try something different: to start AL from the network and mount the HDD later on...
| | https://linuxcontainers.org/lxc/manpages/man5/lxc.container.conf.5.html#lbAR |
|
| |
|
| Usually this kind of setup needs
| | If you still want disable mount protection in grsecurity then you |
| * a DHCP server to get an IP address and the location of the TFTP server
| | can do that with: |
| * a TFTP server to download the kernel and tje root file system to boot from
| | echo 0 > /proc/sys/kernel/grsecurity/chroot_deny_mount |
| * a NFS server or a HTTP one to get the overlay used to configure the machine
| | """ |
| * a NFS server to share files with others
| |
| * a NBD server to get his own block devices as storage
| |
| * a machine where to prepare initramfs
| |
|
| |
|
| First, let's check what is vailable in AL and what is not...
| | this is not working with |
| * dhcpcd-6.6.7-r0
| |
| * tftp-hpa-5.2-r1
| |
| * nfs-utils-1.3.1-r2
| |
| * darkhttpd-1.10-r1
| |
| * qemu-nbd (not really good but exists)
| |
|
| |
|
| == PXE_boot == | | <pre>lxc.mount.entry=nfsserver:/srv/boot/alpine mnt nfs nosuid,intr 0 0</pre> |
|
| |
|
| We are trying to do something as in [[PXE_boot]].
| | on the host machine with all nfs modules and helper software installed and loaded. |
|
| |
|
| We did it on separate machine for each service. It forces us to deeply understand all interactions between processes.
| |
|
| |
| === dhcpd ===
| |
|
| |
| 192.168.1.1
| |
|
| |
| with package dhcp from repo. <s>Nothing special.</s>
| |
|
| |
| <pre>
| |
| filename "pxelinux.0";
| |
| next-server 192.168.1.2;
| |
| </pre>
| |
|
| |
| and
| |
| <pre> | | <pre> |
| # Disable RFC 2136 dynamic DNS updates. | | backend:~# lxc-start -n nfstest |
| ddns-update-style none;
| | lxc-start: conf.c: mount_entry: 2049 Invalid argument - failed to mount |
| | | 'nfsserver:/srv/boot/alpine' on '/usr/lib/lxc/rootfs/mnt' |
| # Define actions to take when leases are committed, released, or expired to
| | lxc-start: conf.c: lxc_setup: 4163 failed to setup the mount entries for |
| # accomplish dynamic DNS updates to djbdns. This does not use the RFC 2136
| | 'nfstest' |
| # update mechanism, because djbdns does not support it. However, it
| | lxc-start: start.c: do_start: 688 failed to setup the container |
| # accomplishes the same thing.
| | lxc-start: sync.c: __sync_wait: 51 invalid sequence number 1. expected 2 |
| # syntax "execute(cmd, arg, ...)"
| | lxc-start: start.c: __lxc_start: 1080 failed to spawn 'nfstest' |
| ### need to check if the two "on EVENT" must be nested or in sequence...
| |
| on commit { | |
| execute ("/usr/local/bin/dns-update-djb",
| |
| "commit",
| |
| lcase (option host-name),
| |
| config-option domain-name,
| |
| binary-to-ascii (10, 8, ".", leased-address));
| |
| on release or expiry {
| |
| execute ("/usr/local/bin/dns-update-djb",
| |
| "release",
| |
| binary-to-ascii (10, 8, ".", leased-address));
| |
| }
| |
| }
| |
| </pre> | | </pre> |
|
| |
|
| with a custom /usr/local/bin/dns-update-djb script largely inspired from https://sites.google.com/site/dmoulding/dns-update-djb but adapted for a distant tinydns server and to the AL way. | | Nor with |
|
| |
|
| === tftp ===
| |
|
| |
| 192.168.1.2
| |
|
| |
| tftp-hpa configured to serve some SYSLINUX files.
| |
|
| |
| The config is in /etc/conf.d/in.tftpd<br/>
| |
| Then to issue:
| |
| <pre> | | <pre> |
| rc-update add in.tftpd
| | echo 0 > /proc/sys/kernel/grsecurity/chroot_deny_mount |
| rc-service in.tftpd start
| |
| </pre>
| |
| | |
| We serve from /var/tftpboot.
| |
| | |
| We add to temporary install the syslinux apk to get pxelinix.0 and other libs needed. <br/>
| |
| We did prepare a "pxerd" initramfs file with virtio_net.ko, dhcp and nfs included; made sure loop and squashfs are included. <br/>
| |
| pxelinux.cfg/default looks like <pre>
| |
| PROMPT 0
| |
| TIMEOUT 3
| |
| default alpine
| |
| LABEL alpine
| |
| LINUX alpine/vmlinuz-grsec
| |
| INITRD alpine/pxerd
| |
| APPEND ip=dhcp alpine_dev=nfs:192.168.1.3:/srv/boot/alpine modloop=/boot/grsec.modloop.squashfs nomodeset quiet apkovl=http://192.168.1.4/localhost.apkovl.tar.gz
| |
| #APPEND modloop=http:/192.168.1.4/grsec.modloop.squashfs
| |
| #APPEND apkovl=http://192.168.1.4/localhost.apkovl.tar.gz # including the modloop hack
| |
| #APPEND alpine_repo=http://repo-url
| |
| </pre>
| |
| | |
| Modules are loaded <pre>
| |
| / # lsmod
| |
| Module Size Used by Not tainted
| |
| nfsv3 22784 1
| |
| nfs 144376 2 nfsv3
| |
| lockd 71917 2 nfsv3,nfs
| |
| sunrpc 225574 6 nfsv3,nfs,lockd
| |
| af_packet 28735 0
| |
| sr_mod 13487 0
| |
| cdrom 40424 1 sr_mod
| |
| pata_acpi 3326 0
| |
| ata_piix 25601 0
| |
| ata_generic 3554 0
| |
| libata 181955 3 pata_acpi,ata_piix,ata_generic
| |
| virtio_net 19684 0
| |
| scsi_mod 113710 2 sr_mod,libata
| |
| virtio_pci 6485 0
| |
| virtio 4933 2 virtio_net,virtio_pci
| |
| virtio_ring 9161 2 virtio_net,virtio_pci
| |
| squashfs 25893 1
| |
| loop 18243 2
| |
| </pre> Network is up <pre>
| |
| / # ifconfig | |
| eth0 Link encap:Ethernet HWaddr 52:54:33:B0:C2:D2
| |
| inet addr:192.168.1.108 Bcast:0.0.0.0 Mask:255.255.255.0
| |
| UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
| |
| RX packets:322 errors:0 dropped:0 overruns:0 frame:0
| |
| TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
| |
| collisions:0 txqueuelen:1000
| |
| RX bytes:20514 (20.0 KiB) TX bytes:684 (684.0 B)
| |
| </pre> but modloop does not load
| |
| | |
| This patch fix this issue (hope to see it mainstream soon) <pre>
| |
| localhost:~# diff /etc/init.d/modloop modloop.new
| |
| --- /etc/init.d/modloop
| |
| +++ modloop.new
| |
| @@ -32,7 +32,7 @@
| |
| local search_dev="$1" fstab="$2"
| |
| local dev mnt fs mntopts chk
| |
| case "$search_dev" in
| |
| - UUID=*|LABEL=*|/dev/*);;
| |
| + UUID=*|LABEL=*|/dev/*|nfs);;
| |
| *) search_dev=/dev/$search_dev;;
| |
| esac
| |
| local search_real_dev=$(resolve_dev $search_dev)
| |
| @@ -49,6 +49,10 @@
| |
| fi
| |
| done
| |
| done
| |
| + if [ "$fs" = "$search_dev" ]; then
| |
| + echo "$mnt"
| |
| + return
| |
| + fi
| |
| done < $fstab 2>/dev/null
| |
| }
| |
| | |
| </pre>
| |
| | |
| === References ===
| |
| | |
| http://www.syslinux.org/wiki/index.php/PXELINUX
| |
| | |
| === nfs ===
| |
| | |
| 192.168.1.3
| |
| | |
| see http://wiki.alpinelinux.org/wiki/User_talk:Jch#NFS_bug_study <br/>
| |
| '''It is now working with''' http://dev.alpinelinux.org/~clandmeter/rpcbind-0.2.3_rc2-r0.apk
| |
| | |
| We serve the content of an usb key (iso) in ro as <pre>
| |
| /srv/boot/alpine *(ro,no_root_squash,no_subtree_check) | |
| </pre> | | </pre> |
|
| |
|
| === http ===
| | on the host machine with all nfs modules and helper software installed and loaded which does'nt work either. |
| | |
| 192.168.1.4
| |
| | |
| With package [[Darkhttpd]] from repo serving from /var/tftpboot/ to serve files needed to boot (kernel, rootfs, apkovl.tar.gz)
| |
| | |
| === nbd ===
| |
| | |
| 192.168.1.5
| |
| | |
| I really would like to have xnbd-server in AL.<br/>
| |
| For now, we have a qcow2 debian image added to the apkovl with lbu add; lbu ci.<br/>
| |
| This image is used to launch a first KVM with /dev/mdX as second drive.<br/>
| |
| In turn, inside the KVM, vdb is used to define a lvm2 volume.<br/>
| |
| The LV are published with xnbd-server.
| |
| | |
| Later on, the same KVM will be able to connect to RBD device and re-publish it as NBD.
| |
| | |
| '''xnbd-server''' allows ''live migration'' of Block Devices while live. And has a powerfull ''proxy'' mode.
| |
| | |
| All other KVM are running from FS accessed trough NBD from such SAN. Even other SAN.<br/>
| |
| As soon as those '''KVM-NBD''' are up, they may be used to <u>launch others</u> or to provide ''datastores''.
| |
| | |
| We put that image on every USB key we use along with mdadm and OpenVSwitch (and collectd).
| |
| | |
| === dns ===
| |
| | |
| 192.168.1.6
| |
| | |
| tinydns from repo with split-dns config.
| |
| | |
| = Building a complete infrastucture with AL =
| |
| | |
| I'm doing it. It's for real! That's my daily job at present ^^
| |
| | |
| I'm building a full private cloud bootstraped with only an AlpineLinux USB key for each physical machine. But next ones will be able to boot from network; not even USB keys will be needed. As a matter of fact, we used more than only one physical USB key because we didn't started from scratch but had a live migration from Debian to Alpine for most of the services and machines...
| |
| | |
| If there is some feed-back, I may develop config files and so on ;)
| |
| | |
| As I started from scratch and OpenVSwitch was not available in Alpine at that time yet, It took me a while to build everything. But to reproduce it, it would be ''piece of cake''!
| |
| | |
| We use qemu-kvm for KVM. But I guess one may use whatever Virtual Machine technology one likes.
| |
| | |
| '''This is the presentation of a use case. Not a HOW TO. And it's still a work in progess...'''
| |
| | |
| == Network ==
| |
| | |
| === Firewall ===
| |
| | |
| We put a dedicated physical machine on each link between our LAN and other networks.
| |
| It just run iptables and some paquets accounting metrology.
| |
| | |
| === Router ===
| |
| | |
| Physical machine connected to our LAN and other networks (trough a firewall). A static routing table do the trick.
| |
| | |
| === Switches ===
| |
| | |
| All physical machines run OpenVSwitch reproducing virtually all physical switches we have plus some virtuals only.
| |
| | |
| === VPN ===
| |
| | |
| All physical machines run openVPN as client to as many switch defined less the physical interfaces of the machine. There is an openVPN server somewhere running in a KVM connected to needed switches.
| |
| | |
| == Storage ==
| |
| | |
| === SAN ===
| |
| | |
| On each physical machine, a couple of HDD are mounted in raid1 witch mdadm. This raid array is passed as parameter to a KVM who in turn mount it as physical volume for LVM. The created LV are published as NBD with xnbd-server. For the time being, this KVM is running debian 7.8 as xnbd is not in Alpine (yet?)..
| |
| | |
| The SAN also connects to the CEPH cluster as client and publish reached RBD as NBD with xnbd-server. For the time being, this KVM is running debian 7.8 as no xnbd nor RBD are in Alpine (yet?)..
| |
| | |
| === NAS ===
| |
| | |
| Running on the same physical machine, another KVM is mounting some NBD (with qemu-nbd) as local drives and publishing some directories as NFS shares.
| |
| For the time being, this KVM is running debian 7.8 as there is no good nbd-client in Alpine (yet?)... We now have nfs-server and nfs-client in AL.
| |
| | |
| === CEPH ===
| |
| | |
| KVM with physical HDD as parameters are used for building OSD and MON needed to operate a CEPH cluster.
| |
| One KVM is the "console" to drive it from a single point of presence (usefull but not "needed").For the time being, those KVM are running debian 7.8 as CEPH and RBD are not in Alpine (yet?)..
| |
| | |
| == Low-level services ==
| |
| | |
| No service at all is running in the AL on bare metal. All are running is some KVM connected to needed switches by the means of the OpenVSwitches.
| |
| The apkovl on the USB keys contains only the scripts to launch KVM and one image file to launch the first SAN. Other KVM are launched from LV in the SAN.
| |
| | |
| === dhcp ===
| |
| | |
| Exactly two KVM stored in different SAN, ''primary'' and ''secondary'' in <u>failover mode</u>, are running '''dhcp'''d from repo. <br/>
| |
| We just have to configure it properly.
| |
| | |
| We have to test if '''dhcp'''d may run in a LXC instead of a KVM?
| |
| | |
| === DNS ===
| |
| | |
| tinydns from repo with split-dns config.
| |
| | |
| === Resolver ===
| |
| | |
| With '''dnscache''' from repo.
| |
| | |
| Those KVM have <u>manually assigned IP address in the LAN</u> and does know a gateway to the Internet.<br/>
| |
| They use themselves as resolver... <br/>
| |
| They know the direct manually assigned IP address in the LAN of the main DNS server of selected domains (for split dns configuration).
| |
| | |
| === PXEboot ===
| |
| | |
| kernel and initrd files in '''tftp''' server.<br/>
| |
| copy of usb content in '''nfs''' server.<br/>
| |
| apkovl files in '''darkhttpd''' server.
| |
| | |
| === Time server ===
| |
| | |
| The router (who has access to internet) usr '''ntpd''' (or similar) from repo, to act as <u>client to the WAN</u> and <u>server to the LAN</u>.
| |
|
| |
|
| === syslog ===
| | 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. |
|
| |
|
| With '''syslog-ng''' from repo, we receive the logs from all machines be it physical or virtual.<br/>
| | Next step will be to have HA for the NFS server itself (with only AL machines). |
| It's the only place who needs '''logrotate''' from repo.
| |
|
| |
|
| === HTTP proxy/cache === | | == About NBD == |
|
| |
|
| The web proxy/cache '''squid''', from repo, uses a NBD as cache.
| | NBD is now in edge/testing thanks to clandmeter. |
| It has a link to the internet to forward requests and one to the LAN.
| |
|
| |
|
| Because of him, no machine, as they are all connected to the LAN, be it physical or virtual, needs a published default gateway.
| | we now use xnbd ^^ |
| And all machines are able to install/upgrade packages or to see the WWW as client.
| |
|
| |
|
| We point all AL boxes to this KVM with '''setup-proxy'''.
| | 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. |
|
| |
|
| === Monitoring === | | == About consul == |
|
| |
|
| shinken from sources in some LXC with barely only the python package installed
| | nothing yet but big hopes ^^<br/> |
| | I'm lurking IRC about it ;) |
|
| |
|
| === Metrology ===
| | We plan to use it's dynamic DNS feature, it's hosts listing, services inventory, events, k/v store... <br/> |
| | and even semi high-availability for our PXE infrastructure the consul leader being the active PXEserver and other consul server are dormant PXEservers.<br/> |
| | All config scripts adapted to pull values out of consul k/v datastore based on profiles found out of consul various lists.<br/> |
| | As the key for dhcpd and PXEboot is the hwaddr, it will become our uuid for LAN and consul too.<br/> |
| | '''We are very exited by consul capacities!'''<br/> |
| | Will be avid tester! |
|
| |
|
| '''Collectd''' (one LXC as server, all other machines, be it physical or virtual, as client) with collectd-network from repo.<br/> | | '''Open questions''': |
| A couple of lines in CGP config file is enough for now.
| |
|
| |
|
| === Backups ===
| | # What memory footprint is needed? |
| | # What about dynamycally adapt quorum size? |
| | # Are checks possible triggers? |
| | #* <pre>consul watch -prefix type -name name /path/to/executable</pre> |
| | #* <pre>consul event [options] -name name [payload]</pre> |
| | # What best practice to store etc configurations? |
| | #* http://code.hootsuite.com/distributed-configuration-management-and-dark-launching-using-consul/ |
| | #* http://agiletesting.blogspot.fr/2014/11/service-discovery-with-consul-and.html |
| | #* envconsul |
| | #* consul-template |
|
| |
|
| with common tools: '''rsync''', '''tar''', '''nc''', '''bzip2''', '''openssh''', '''cron'''
| | log of experimentation at [[User_talk:Jch/consul]] |
|
| |
|
| === LDAP === | | == About CEPH == |
|
| |
|
| openldap with openldap-back-hdb, both from repo.
| | CEPH is supposed to sovle the problem of high availability for the data stores, be it block devices (disks) or character devices (files). |
|
| |
|
| http://www.openldap.org/doc/admin24/backends.html states<br/>
| | The actual situation is not satisfactory. |
| > The hdb backend to slapd(8) is the recommended primary backend for a normal slapd database.<br/>
| |
| And<br/>
| |
| > Note: The hdb backend has superseded the bdb backend, and both will soon be deprecated in favor of the new mdb backend.
| |
|
| |
|
| > The mdb backend to slapd(8) is the upcoming primary backend for a normal slapd database. It uses OpenLDAP's own Lightning Memory-Mapped Database (LMDB) library to store data and is intended to replace the Berkeley DB backends. | | '''We are very exited by CEPH capacities!'''<br/> |
| | Will be avid tester! |
|
| |
|
| Unfortunately there is no ''openldap-back-mdb'' package in AL yet.
| | The Alpine kernel has now RBD modules compiled. |
|
| |
|
| == High-level services ==
| | We will build a CEPH cluster out of 3 Ubuntu LTS and use AL boxes as client if possible (to launch qemu instances directly from RBD). If not, we then will attach RBD and reexport them with xNBD inside a debian KVM. |
|
| |
|
| in LXC AL whenever possible.<br/>
| | == About Docker == |
| in LXC Debian as second choice<br/>
| |
| in KVM otherwise.
| |
|
| |
|
| === x2goserver ===
| | not a lot of information on the [[Docker]] page yet ... |
|
| |
|
| I did package nx-libs and x2goserver. I'm waiting for the packages to be included in edge/testing. They are already being used for single app access. Next step is full desktop but we are not sure if AL is the right choice for full desktop usage for our customers...
| | == About E-MailRelay == |
|
| |
|
| unfortunately, '''x2goclient''' pops up "kex error : did not find one of algos diffie-hellman-group1-sha1 in list curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1 for kex algos"
| | E-MailRelay is a simple SMTP proxy and store-and-forward message transfer agent (MTA). <br/> |
| need to specify diffie-hellman-group1-sha1 in sshd_config. Luckyly a fix exists and my business partner is looking after a way to enhance it's security upstream.
| | See http://emailrelay.sourceforge.net/ |
| | |
| === ejabberd ===
| |
| | |
| with ejabberd from edge/testing repo.
| |
| I migrate the mnesia DB from an old debian squeeze just copying the files and changing ownership in a LXC-AL. I just had to disable mod_pubsub to have it run properly. Authentification is done with openLDAP.
| |
| I now plan to migrate a very very old jabberd (11 years I guess) running on a debian etch to it if I find a way to keep users's password and rosters...
| |
| I also would like to use it as a gateway to IRC to follow #alpine, #alpine-devel and #x2go channels ;)
| |
| Some other ejabberd features are interesting to my organisation and we will experiment more in depth, namely mod_sip, mod_stun, mod_proxy65...
| |
| | |
| === redmine ===
| |
| | |
| in a brand new LXC with edge/main and edge/testing repos<br/>
| |
| mostly following [[Redmine]] page</br/>
| |
| I use a mariaDB server on another host where I did create the user and pushed the sqldump from a running redmine 3.0.0 instance
| |
|
| |
|
| | It compiles fine on AL. |
| <pre> | | <pre> |
| apk update | | apk update |
| apk upgrade
| | apk add subversion alpine-sdk |
| reboot
| | svn checkout svn://svn.code.sf.net/p/emailrelay/code/trunk emailrelay-code |
| setup-timezone
| | cd emailrelay-code |
| apk add redmine | | ./configure --prefix=/usr |
| apk add ruby-unicorn
| | make |
| cp /etc/unicorn/redmine.conf.rb.sample /etc/unicorn/redmine.conf.rb
| | make install |
| vi /etc/conf.d/unicorn
| | apk del subversion alpine-sdk |
| vi /etc/redmine/database.yml
| | apk add libgcc libstdc++ |
| apk add sudo
| | emailrelay --help |
| apk add ruby-mysql2
| |
| apk add ruby-yard
| |
| cd /usr/share/webapps/redmine
| |
| sudo -u redmine rake generate_secret_token
| |
| </pre>
| |
| But
| |
| <pre>
| |
| redmine:/usr/share/webapps/redmine# sudo -u redmine RAILS_ENV=production rake db:migrate
| |
| rake aborted!
| |
| TZInfo::DataSourceNotFound: No source of timezone data could be found.
| |
| Please refer to http://tzinfo.github.io/datasourcenotfound for help resolving this error.
| |
| /usr/share/webapps/redmine/config/environment.rb:14:in `<top (required)>'
| |
| TZInfo::ZoneinfoDirectoryNotFound: None of the paths included in TZInfo::ZoneinfoDataSource.search_path are valid zoneinfo directories.
| |
| /usr/share/webapps/redmine/config/environment.rb:14:in `<top (required)>'
| |
| Tasks: TOP => db:migrate => environment
| |
| (See full trace by running task with --trace)
| |
| </pre> | | </pre> |
|
| |
|
| == Master key ==
| | But I still have issues to properly build a package because it wants to install some stuff in <PREFIX>/libexec...<br/> |
| | (And I also need to separate -doc, -test, -extra and optionnaly -gui in subpackages I guess) |
|
| |
|
| We want to be able to bootstrap the full infrastructure from only one usb key and one machine with physical access (to insert the usb key obviously).
| | == About X2Go == |
|
| |
|
| This key will run AL stable.
| | === x2goserver === |
| With only very few packages installed.
| |
| But some images on the sorage.
| |
|
| |
|
| === Initial packages ===
| | I did prepare x2goserver and nx-libs packages. |
|
| |
|
| dhcpd tftp syslinux nfs darkhttp openssh vim
| | === x2goclient === |
| openvswitch mdadm qemu screen collectd collectd-network gptdisk irqbalance ssmtp mailx
| |
|
| |
|
| === Bootstrap ===
| | <pre> |
| | lrelease-qt4 x2goclient.pro |
| | /bin/bash: lrelease-qt4: command not found |
| | Makefile:39: recipe for target 'build_client' failed |
| | </pre> Dunno where to find that... |
|
| |
|
| First, we setup the network. Remember, this is a bootstrap. We assume nothing exect to have (or not) an internet connexion on some ethernet cable plugged into some NIC.
| | == My laptop setup == |
| It means we may take any decision we see fit.
| |
|
| |
|
| Our primary machine is the only fixed point for now. Let's give it the number 1.<br/>
| | AL 3.3 with +/etc/inittab+ <pre> |
| All machines are connected to the LAN. We know nothing yet about other NICs.<br/>
| | tty5::respawn:/usr/bin/su - jch mcabber |
| First we must decide about the LAN IP range. For instance be it 192.168.1.0/24.<br/>
| | tty6::respawn:/usr/bin/su - jch tmux |
| We will use complicated network setup, let's start by installing openvswitch on bare metal
| | tty7::respawn:/usr/bin/su - jch startx |
| apk add openvswitch
| | </pre> and +~/.xinitrc+ <pre> |
| rc-update add ovs-modules
| | #!/bin/sh |
| rc-update add ovsdb-server
| | exec chromium-browser --no-sandbox |
| rc-update add ovs-vswitch
| | </pre> |
| rc-service ovs-modules start
| |
| rc-service ovsdb-server start
| |
| rc-service ovs-vswitch start
| |
| ovs-vsctl add-br lan
| |
| ovs-vsctl add-port lan eth0
| |
| vi /etc/network/interfaces #iface eth0 inet manual
| |
| #iface lan inet dhcp
| |
| | |
| No machine will offer any service from bare metal.
| |
| apk add qemu-system-x86_64 screen libusb
| |
| modprobe kvm
| |
| modprobe kvm-intel
| |
| modprobe kvm-amd
| |
| modprobe tun
| |
| screen -m -d -S KVM-infra qemu-system-x86_64 -kvm -kernel /kernel -initrd /initrd -append alpine_dev=...,apkovl=... -net -net -drive /dev/usb
| |
| | |
| La suite immédiate se fait dans cette VM
| |
| screen -r KVM-infra
| |
| | |
| We need the storage space from the usb key to handle boot images and apkovl files.<br/>
| |
| In KVM-infra
| |
| setup-alpine (fixed IP)
| |
| apk add openvswitch
| |
| rc-update add ovs-modules
| |
| rc-update add ovsdb-server
| |
| rc-update add ovs-vswitch
| |
| rc-service ovs-modules start
| |
| rc-service ovsdb-server start
| |
| rc-service ovs-vswitch start
| |
| ovs-vsctl add-br lan
| |
| ovs-vsctl add-port lan eth0
| |
| vi /etc/network/interfaces #iface eth0 inet manual
| |
| #iface lan inet static
| |
| mkdir -p /srv
| |
| mount /vda2 /srv
| |
| mkdir -p /srv/nfs/alpine
| |
| mount /vda1 /srv/nfs/alpine
| |
| | |
| Next we will have other networked devices. We need dhcpd (in KVM-infra)
| |
| apk add dhcpd
| |
| rc-update dhcpd
| |
| vi /etc/dhcp/dhcpd.conf #filename "pxelinux.0";
| |
| #next-server 192.168.1.1;
| |
| rc-service dhcpd start
| |
| | |
| To boot others, we need tftp, nfs and http (tftp and http in LXC, nfs in KVM-infra)
| |
| apk add tftp-hla nfs-utils darkhttp
| |
| rc-update add nfs
| |
| rc-update add tftp
| |
| rc-update add darkhttpd
| |
| mkdir -p /srv/nfs
| |
| mkdir -p /srv/tftp
| |
| mkdir -p /srv/http
| |
| vi /etc/exports
| |
| vi /etc/tftp
| |
| vi /etc/darkhttp
| |
| rc-service tftp start
| |
| rc-service darkhttpd start
| |
| rc-service nfs start
| |
| | |
| Let's populate those servers.
| |
| mkdir -p /srv/tftp/alpine
| |
| cp /media/usb/boot/vmlinuz* /srv/tftp/alpine/
| |
| cp /media/usb/boot/modloop* /srv/tftp/alpine/
| |
| apk add mkinitfs
| |
| cd /etc/mkinitfs
| |
| vi features.d/network.modules
| |
| vi features.d/dhcp.files
| |
| vi features.d/dhcp.modules
| |
| vi features.d/nfs.modules
| |
| vi mkinitfs.conf # add network, dhcp, nfs and squashfs
| |
| mkinitfs -o /srv/tftp/alpine/pxerd
| |
| apk del mkinitfs
| |
| apk add syslinux
| |
| cp /usr/share/syslinux/pxelinux.0 /srv/tftp/
| |
| cp /usr/share/syslinux/ldlinux.c32 /srv/tftp/
| |
| apk del syslinux
| |
| mkdir -p /srv/tftp/pxelinux.cfg
| |
| vi /srv/tftp/pxelinux.cfg/default
| |
| | |
| All we need now to boot another AL machines (be it physical or virtual) are some {MAC}.apkovl.tar.gz files served by darkhttpd. We badly need name resolution at this stage. DNS and resolver are needed. DNS to be updated dynamically by dhcp server with split-dns. Resolver knowing the fixed IP address on the DNS and the default route if known at this stage. Both may run in LXC inside this KVM-infra (like the other previous services). DNS will be djbdns and resolver will be dnscache (both from repo).
| |
| | |
| Then (for now) we need image of a debian install with xnbd-server and lvm2 to build SAN. <br/>
| |
| Also, on bare-metal we need mdadm to assemble raid1 arrays. <br/>
| |
| A new SAN is therefore, a MAC address (for debian boot as san), some BD as vda (raid1 from mdadm). <br/>
| |
| A <u>new server is</u> therefore, a '''MAC address''' (for AL boot), a '''apkovl file''' (MAC named), some '''data NBD''' from some SAN. <br/>
| |
| The apkovl will be downloaded at boot time with PXE provided address; before launching openvswitch! The IP address will then change because of the apparent MAC change when OVS becomes active.<br/>
| |
| We may use symlinks to MAC named config files to have a more human friendly view.
| |
| | |
| It is to be noted that after bootstrap KVM may move to other physical machines. While some KVM-infra is somehow connected to the LAN, everything stay alive! This precise image will be reproduced in every SAN build.
| |
| | |
| === Deploy ===
| |
| | |
| After bootstraping, we dispose of a way to boot any AL KVM or bare-bone in about 10 sec.
| |
| | |
| <u>First</u> we deploy KVM-SAN on bare-metal.
| |
| | |
| Next we deploy KVM-AL grouping (or not) some LXC (AL or debian).
| |
| | |
| <u>Second</u> we deploy low-level services: syslog-ng, fail2ban, openVPN, '''la_console''', http-reverse-proxy (primary and secondary), http-proxy, smtp relay, secondary resolver, secondary dns, ldap (primary and secondary), NAS, mariaDB, backups, collectd, shinken, local AL repo, git
| |
|
| |
|
| <u>Third</u> intermediary services: smtp in, smtp out, antivirus, antispam, smtp store, imap, pop3, http, php, sip, jabber
| | == About gpve == |
|
| |
|
| <u>High level</u> services: x2goserver, lamp, mail toaster, webdav, redmine, etc | | {{pkg|gvpe}}<br> |
| | http://software.schmorp.de/pkg/gvpe.html |
|
| |
|
| For each of those services, we provide a template in the form of a {kvm-template}.apkovl.tar.gz.<br/>
| | Plan to use it to interconnect about 5 sites. |
| After customisation, "lbu package" followed by sending the a.tgz to the central repository is all needed.<br/>
| |
| We follow a naming convention for MAC:
| |
|
| |
|
| For bare metal, the 3 first bytes of the MAC is the manufacturer ID.<br/>We symlink that to the baremetal.apkovl.tar.gz.
| | == About freeswitch == |
|
| |
|
| For KVM, we fix the MAC ourself. <br/>The first 2 bytes (AA:BB) are fixed. <br/>The third one (CC) is the level type of the KVM. <br/>The fourth one (DD) is the specific type of the template. <br/>The last 2 ones are incremental unique ID. <br/>So we are able to define pxelinux.cfg/AA:BB:CC:DD symlinks to config files defining use of {kvm-template}.apkovl.tar.gz.
| | I have a request to run a SIP server for a couple of users.<br/> |
| | I'm doing it in some LXC accessed trough an openVPN from Jolla phones. |
|
| |
|
| As {kvm-template}.apkovl.tar.gz tend to be small, we can store a lot of those on the initial USB stick.<br/>
| | == New rollout of our infra == |
| Depending on available space on the USB stick, we could offer {lxc-template}s that way from the USB stick to be downloaded from darkhttpd with wget to the right KVM. Or later on from any wanted NAS.
| |
|
| |
|
| We add a couple of other OVS (WAN, STORAGE) in every machines. Some are connected to NIC. Some are connected to VPN. Netflow will be used in the future to manage the network (naas: network as a service). One of those OVS (WAN) allows connected machines to access the internet trough a default route passing through a physical firewall. STORAGE is used for data replication between SAN and NAS.
| | This week, we will upgrade some hardware and also redo all the infrastructure based on the fresh 3.3 serie. |
|
| |
|
| We have the list of bare-metal machines.<br/>
| | The compute nodes will run (on baremetal) with mdadm, openvswitch, qemu, consul, collectd, screen (maybe tmux) and openssh. |
| Those may launch KVM in one command.
| |
|
| |
|
| We have the list of SAN KVM.<br/>
| | The storage nodes will run a CEPH cluster (unfortunately not based on AL). |
| Those may create and publish NBD in two commands.<br/>
| |
| Even on ''diskless' machines those are present to offer nbd-proxy in one command.
| |
|
| |
|
| All those command are grouped as ''one-liner'' scripts in some redundant NAS available from '''la_console'''.
| | Everything else will run in various KVM on the compute nodes. |
|
| |
|
| Waiting for CEPH, we need a strategy for duplicating NBD accros SAN.
| | First, let's check if the needed package are available in the basic ISOs. If yes we will be able to run from USB keys. If not we will need to have sys install on the HDD... |
How to emulate USB stick with KVM.
How to set up a PXE environement.
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.
we now use xnbd ^^
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.
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?
- 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!
The Alpine kernel has now RBD modules compiled.
We will build a CEPH cluster out of 3 Ubuntu LTS and use AL boxes as client if possible (to launch qemu instances directly from RBD). If not, we then will attach RBD and reexport them with xNBD inside a debian KVM.
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
AL 3.3 with +/etc/inittab+
tty5::respawn:/usr/bin/su - jch mcabber
tty6::respawn:/usr/bin/su - jch tmux
tty7::respawn:/usr/bin/su - jch startx
and +~/.xinitrc+
- !/bin/sh
exec chromium-browser --no-sandbox
About gpve
gvpe
http://software.schmorp.de/pkg/gvpe.html
Plan to use it to interconnect about 5 sites.
About freeswitch
I have a request to run a SIP server for a couple of users.
I'm doing it in some LXC accessed trough an openVPN from Jolla phones.
New rollout of our infra
This week, we will upgrade some hardware and also redo all the infrastructure based on the fresh 3.3 serie.
The compute nodes will run (on baremetal) with mdadm, openvswitch, qemu, consul, collectd, screen (maybe tmux) and openssh.
The storage nodes will run a CEPH cluster (unfortunately not based on AL).
Everything else will run in various KVM on the compute nodes.
First, let's check if the needed package are available in the basic ISOs. If yes we will be able to run from USB keys. If not we will need to have sys install on the HDD...