Nhanganyaya kubva kumuturikiri: Nekumashure kwekupinda kukuru muhupenyu hwedu hwemhando dzakasiyana dzemidziyo, zvinogona kunakidza uye zvinobatsira kuziva kuti zvakatanga kamwe chete nehunyanzvi hwekuita. Vamwe vavo vanogona kushandiswa zvinobudirira kusvika nhasi, asi havasi vose vanoyeuka nzira dzakadaro (kana vanoziva kana vasina kubatwa panguva yekukura kwavo nokukurumidza). Imwe tekinoroji yakadaro ndeye Mushandisi Mode Linux. Munyori wepakutanga akaita kuchera kwakawanda, achifunga kuti ndezvipi zvezvinoitika zvekare zvichiri kushanda uye izvo zvisingashande, uye akaisa pamwechete chimwe chinhu senge nhanho-nhanho murairo wekuti ungazviwanira sei imba yekumba UML mu2k19. Uye hongu, isu takakoka munyori weiyo yekutanga positi kuna Habr , saka kana uine mibvunzo - bvunza muChirungu mumashoko.
Mushandisi Modhi muLinux, chokwadi, chiteshi cheLinux kernel kune pachayo. Iyi modhi inobvumidza iwe kumhanyisa yakazara Linux kernel semushandisi maitiro uye inowanzoshandiswa nevagadziri kuyedza vatyairi. Asi iyi modhi inobatsira zvakare seyakajairwa yekuzviparadzanisa nevamwe, musimboti wayo wakafanana nekushanda kwemashini chaiwo. Iyi modhi inopa yakasarudzika kupfuura Docker, asi isingasviki yakazara-yakazara-yakazara muchina seKVM kana Virtual Bhokisi.
Kazhinji, Mushandisi Modhi inogona kuita sechinhu chinoshamisa uye chakaoma kushandisa, asi ichine mashandisiro ayo. Mushure mezvose, iyi izere-yakazara Linux kernel inomhanya kubva kune asina rombo mushandisi. Iyi ficha inobvumira inogona kusavimbika kodhi kuti imhanye pasina kutyisidzira kumushini wekutambira. Uye sezvo iyi iri kernel yakazara-yakazara, maitiro ayo akaparadzaniswa kubva kumuchina wekutambira, kureva maitiro anomhanya mukati meMushandisi Modhi hazvizoonekwe kune muenzi. Izvi hazvina kufanana neyakajairwa Docker mudziyo, mune iyo kesi muchina wekutambira unogara uchiona maitiro mukati me repository. Tarisa ichi chidimbu che pstree kubva kune imwe yemaseva angu:
containerd─┬─containerd-shim─┬─tini─┬─dnsd───19*[{dnsd}]
│ │ └─s6-svscan───s6-supervise
│ └─10*[{containerd-shim}]
├─containerd-shim─┬─tini─┬─aerial───21*[{aerial}]
│ │ └─s6-svscan───s6-supervise
│ └─10*[{containerd-shim}]
├─containerd-shim─┬─tini─┬─s6-svscan───s6-supervise
│ │ └─surl
│ └─9*[{containerd-shim}]
├─containerd-shim─┬─tini─┬─h───13*[{h}]
│ │ └─s6-svscan───s6-supervise
│ └─10*[{containerd-shim}]
├─containerd-shim─┬─goproxy───14*[{goproxy}]
│ └─9*[{containerd-shim}]
└─32*[{containerd}]Uye enzanisa izvi kune pstree yeLinux kernel muMushandisi Mode:
linux─┬─5*[linux]
└─slirpKana ndichishanda nemidziyo yeDocker, ini ndinogona kuona kubva kumuridzi mazita emaitiro ari kuita muenzi. NeLinux Mushandisi Modhi, izvi hazvigoneke. Zvinorevei? Izvi zvinoreva kuti maturusi ekutarisa anomhanya kuburikidza neLinux's auditing subsystem usaone maitiro ari kushanda mune yevaenzi system. Asi mune mamwe mamiriro ezvinhu, chimiro ichi chinogona kuve bakatwa rinocheka kaviri.
Kazhinji, iyo positi yese pazasi muunganidzwa wekutsvagisa uye hutsinye kuyedza kuwana mhedzisiro yaunoda. Kuti ndiite izvi, ndaifanira kushandisa maturusi akasiyana ekare, kuverenga zvitubu zve kernel, kuita dhizaini yakasimba yekodhi yakanyorwa mumazuva andakanga ndichiri kuchikoro chepuraimari, uye zvakare tinker neHeroku anovaka achishandisa bhinari yakakosha kuwana maturusi andaida. . Basa rese iri rakaita kuti vakomana veIRC yangu vandishevedze mashiripiti. Ndinovimba iyi positi inoshanda semagwaro akavimbika ekuti mumwe munhu aedze chinhu chimwe chete nemakernels matsva uye OS shanduro.
kuchinja
Kumisikidza Linux Mushandisi Mode kunoitwa mumatanho akati wandei:
- kuisa dependencies pane host;
- kurodha Linux kernel;
- kernel kuvaka kugadzirisa;
- kernel assembly;
- kugadzwa kwemabhinari;
- kugadzirisa iyo yevaenzi faira system;
- kusarudzwa kwe kernel kutanga parameters;
- kugadzira network yevaenzi;
- kutanga kernel yevaenzi.
Ini ndinofungidzira kuti kana ukafunga kuzviita iwe pachako, iwe unogona kuita zvese zvinotsanangurwa mune imwe Ubuntu kana Debian-senge system. Ndakaedza kuita zvese zviri pamusoro mukugovera kwandinofarira - Alpine, asi hapana chakabuda, sezviri pachena nekuda kwekuti iyo Linux kernel ine yakaoma-inosunga glibc-isms yevatyairi muMushandisi Mode. Ini ndinoronga kuzivisa izvi kumusoro kwerwizi mushure mekunge ndanzwisisa dambudziko.
Kuisa dependencies pane host
Ubuntu inoda anotevera mapakeji ekuvaka iyo Linux kernel (kutora yakachena kuisa):
- 'build-essential'
- 'flex'
- 'bison'
- 'xz-utils'
- 'wget'
- 'ca-certificates'
- 'bc'
- 'linux-headers'
Unogona kuvamisa nemurairo unotevera (semudzi kana sudo):
apt-get -y install build-essential flex bison xz-utils wget ca-certificates bc
linux-headers-$(uname -r)
Ziva kuti kumhanya iyo Linux kernel menyu yekuseta chirongwa kunoda kuiswa kwe libncurses-dev. Ndokumbira uve nechokwadi chekuti yakaiswa nemurairo unotevera (semudzi kana sudo):
apt-get -y install libncurses-devKernel download
Sarudza kwaunotora uye wobva wavaka kernel. Pakuita uku, iwe uchafanirwa kugovera nezve 1,3 GB yenzvimbo yakaoma disk, saka ita shuwa kuti unayo.
Mushure mekuenda uye tora iyo URL yekurodha yazvino yakagadzikana kernel. Panguva yekunyora izvi ndezvi:
Dhaunirodha faira iri uchishandisa 'wget':
wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.1.16.tar.xz
Uye kuibvisa nayo 'tar':
tar xJf linux-5.1.16.tar.xzIye zvino isu tinopinda dhairekitori rakagadzirwa kana uchiburitsa tarball:
cd linux-5.1.16Kernel kuvaka setup
Iyo kernel kuvaka system ndeye set с vakawanda maturusi echinyakare uye zvinyorwa kuti otomatiki maitiro. Kutanga, vhura iyo interactive setup chirongwa:
make ARCH=um menuconfig
Ichaita zvishoma kuvaka uye kuratidza dialog bhokisi rako. rinhi'[Select]', unozogona kugadzirisa uchishandisa Space kana Enter makiyi. Enda nepahwindo, semazuva ese, nekhibhodi miseve "kumusoro" uye "pasi", uye sarudza zvinhu - "kuruboshwe" kana "kurudyi".
Iyo yekuona pointer -> zvinoreva kuti uri mune submenu, inowanikwa neEnter kiyi. Nzira yekubuda nayo zviri pachena kuburikidza '[Exit]'.
Sanganisira zvinotevera mu '[Select]' uye ita shuwa kuti vane '[*]' padivi pavo:
UML-specific Options:
- Host filesystem
Networking support (enable this to get the submenu to show up):
- Networking options:
- TCP/IP Networking
UML Network devices:
- Virtual network device
- SLiRP transport
Ndizvozvo, unogona kubuda hwindo iri nekutevera kusarudza '[Exit]'. Ingoita shuwa kuti unokurudzirwa kuchengetedza iyo gadziriso kumagumo uye sarudza '[Yes]'.
Ini ndinokurudzira kuti iwe utambe uchitenderedza ne kernel kuvaka sarudzo mushure mekuverenga iyi positi. Kuburikidza nezviyedzo izvi, unogona kudzidza zvakawanda maererano nekunzwisisa basa reyakaderera-level kernel mechanics uye mabatiro emamureza akasiyana pagungano rayo.
Kugadzira kernel
Iyo Linux kernel chirongwa chikuru chinoita zvinhu zvakawanda. Kunyangwe iine kushomeka kwakadai pane yekare Hardware, zvinogona kutora nguva yakati rebei kuvaka. Saka gadzira kernel nemurairo unotevera:
make ARCH=um -j$(nproc)
Yechii? Uyu murairo uchaudza muvaki wedu kuti ashandise ese aripo CPU cores uye shinda mukuvaka maitiro. Team $(nproc) pakupera kweBuild inotsiva zvinobuda zvemurairo nproc, icho chikamu che coreutils mune yakajairwa Ubuntu kuvaka.
Mushure menguva yakati, kernel yedu ichaunganidzwa kuita faira rinogoneka ./linux.
Kuisa iyo binary
Sezvo Mushandisi Modhi muLinux inogadzira yakajairika bhinari, unogona kuimisa senge chero imwe yekushandisa. Heano maitiro andakaita:
mkdir -p ~/bin
cp linux ~/bin/linux
Izvo zvakakodzerawo kuve nechokwadi kuti ~/bin ari mauri $PATH:
export PATH=$PATH:$HOME/binKugadzira iyo yevaenzi faira system
Gadzira dhairekitori remuenzi faira system:
mkdir -p $HOME/prefix/uml-demo
cd $HOME/prefix
Vhura alpinelinux.org uye mukati tsvaga chaiyo yekurodha link MINI ROOT FILESYSTEM. Panguva yekunyora izvi zvaive:
http://dl-cdn.alpinelinux.org/alpine/v3.10/releases/x86_64/alpine-minirootfs-3.10.0-x86_64.tar.gzDhawunirodha iyi tarball uchishandisa wget:
wget -O alpine-rootfs.tgz http://dl-cdn.alpinelinux.org/alpine/v3.10/releases/x86_64/alpine-minirootfs-3.10.0-x86_64.tar.gzZvino pinda dhairekitori remuenzi faira system uye bvisa iyo archive:
cd uml-demo
tar xf ../alpine-rootfs.tgzZviito zvakatsanangurwa zvinogadzira diki faira system template. Nekuda kwechimiro chesisitimu, zvichave zvakanyanya kuoma kuisa mapakeji kuburikidza neAlpine apk maneja. Asi iyi FS ichave yakakwana kuongorora pfungwa huru.
Tinodawo mudziyo kuderedza kushandiswa kwendangariro yedu muenzi kernel.
wget -O tini https://github.com/krallin/tini/releases/download/v0.18.0/tini-static
chmod +x tiniKugadzira kernel command line
Iyo Linux kernel, semamwe akawanda mapurogiramu, ine yekuraira-mutsara nharo dzinogona kuwanikwa nekutsanangura kiyi --help.
Iye pachake—kubatsira
linux --help
User Mode Linux v5.1.16
available at http://user-mode-linux.sourceforge.net/
--showconfig
Prints the config file that this UML binary was generated from.
iomem=<name>,<file>
Configure <file> as an IO memory region named <name>.
mem=<Amount of desired ram>
This controls how much "physical" memory the kernel allocates
for the system. The size is specified as a number followed by
one of 'k', 'K', 'm', 'M', which have the obvious meanings.
This is not related to the amount of memory in the host. It can
be more, and the excess, if it's ever used, will just be swapped out.
Example: mem=64M
--help
Prints this message.
debug
this flag is not needed to run gdb on UML in skas mode
root=<file containing the root fs>
This is actually used by the generic kernel in exactly the same
way as in any other kernel. If you configure a number of block
devices and want to boot off something other than ubd0, you
would use something like:
root=/dev/ubd5
--version
Prints the version number of the kernel.
umid=<name>
This is used to assign a unique identity to this UML machine and
is used for naming the pid file and management console socket.
con[0-9]*=<channel description>
Attach a console or serial line to a host channel. See
http://user-mode-linux.sourceforge.net/old/input.html for a complete
description of this switch.
eth[0-9]+=<transport>,<options>
Configure a network device.
aio=2.4
This is used to force UML to use 2.4-style AIO even when 2.6 AIO is
available. 2.4 AIO is a single thread that handles one request at a
time, synchronously. 2.6 AIO is a thread which uses the 2.6 AIO
interface to handle an arbitrary number of pending requests. 2.6 AIO
is not available in tt mode, on 2.4 hosts, or when UML is built with
/usr/include/linux/aio_abi.h not available. Many distributions don't
include aio_abi.h, so you will need to copy it from a kernel tree to
your /usr/include/linux in order to build an AIO-capable UML
nosysemu
Turns off syscall emulation patch for ptrace (SYSEMU).
SYSEMU is a performance-patch introduced by Laurent Vivier. It changes
behaviour of ptrace() and helps reduce host context switch rates.
To make it work, you need a kernel patch for your host, too.
See http://perso.wanadoo.fr/laurent.vivier/UML/ for further
information.
uml_dir=<directory>
The location to place the pid and umid files.
quiet
Turns off information messages during boot.
hostfs=<root dir>,<flags>,...
This is used to set hostfs parameters. The root directory argument
is used to confine all hostfs mounts to within the specified directory
tree on the host. If this isn't specified, then a user inside UML can
mount anything on the host that's accessible to the user that's running
it.
The only flag currently supported is 'append', which specifies that all
files opened by hostfs will be opened in append mode.Iri pani rinoratidza iwo makuru ma paramita ekutanga. Ngatimhanyei kernel ine shoma inodiwa seti yesarudzo:
linux
root=/dev/root
rootfstype=hostfs
rootflags=$HOME/prefix/uml-demo
rw
mem=64M
init=/bin/shMitsetse iri pamusoro inoudza kernel yedu zvinotevera:
- Fungidzira kuti midzi yefaira ndeye pseudo mudziyo
/dev/root. - Sarudza semudzi faira system mutyairi.
- Mount iyo yevaenzi faira system yatakagadzira pamudzi mudziyo.
- Uye hongu, mukuverenga-kunyora maitiro.
- Shandisa chete 64 MB ye RAM (unogona kushandisa zvishoma zvichienderana nezvauri kuronga kuita, asi 64 MB inoita seyakanyanya kuwanda).
- Iyo kernel inotanga otomatiki
/bin/shseiinit- process.
Mhanya uyu murairo uye iwe unofanirwa kuwana chimwe chinhu sechinotevera:
Rimwe pepa zvakare
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking environment variables for a tempdir...none found
Checking if /dev/shm is on tmpfs...OK
Checking PROT_EXEC mmap in /dev/shm...OK
Adding 32137216 bytes to physical memory to account for exec-shield gap
Linux version 5.1.16 (cadey@kahless) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #30 Sun Jul 7 18:57:19 UTC 2019
Built 1 zonelists, mobility grouping on. Total pages: 23898
Kernel command line: root=/dev/root rootflags=/home/cadey/dl/uml/alpine rootfstype=hostfs rw mem=64M init=/bin/sh
Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
Inode-cache hash table entries: 8192 (order: 4, 65536 bytes)
Memory: 59584K/96920K available (2692K kernel code, 708K rwdata, 588K rodata, 104K init, 244K bss, 37336K reserved, 0K cma-reserved)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS: 15
clocksource: timer: mask: 0xffffffffffffffff max_cycles: 0x1cd42e205, max_idle_ns: 881590404426 ns
Calibrating delay loop... 7479.29 BogoMIPS (lpj=37396480)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes)
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
devtmpfs: initialized
random: get_random_bytes called from setup_net+0x48/0x1e0 with crng_init=0
Using 2.6 host AIO
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 256 (order: 0, 6144 bytes)
NET: Registered protocol family 16
clocksource: Switched to clocksource timer
NET: Registered protocol family 2
tcp_listen_portaddr_hash hash table entries: 256 (order: 0, 4096 bytes)
TCP established hash table entries: 1024 (order: 1, 8192 bytes)
TCP bind hash table entries: 1024 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
console [stderr0] disabled
mconsole (version 2) initialized on /home/cadey/.uml/tEwIjm/mconsole
Checking host MADV_REMOVE support...OK
workingset: timestamp_bits=62 max_order=14 bucket_order=0
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
io scheduler noop registered (default)
io scheduler bfq registered
loop: module loaded
NET: Registered protocol family 17
Initialized stdio console driver
Using a channel type which is configured out of UML
setup_one_line failed for device 1 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 2 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 3 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 4 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 5 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 6 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 7 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 8 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 9 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 10 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 11 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 12 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 13 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 14 : Configuration failed
Using a channel type which is configured out of UML
setup_one_line failed for device 15 : Configuration failed
Console initialized on /dev/tty0
console [tty0] enabled
console [mc-1] enabled
Failed to initialize ubd device 0 :Couldn't determine size of device's file
VFS: Mounted root (hostfs filesystem) on device 0:11.
devtmpfs: mounted
This architecture does not have kernel memory protection.
Run /bin/sh as init process
/bin/sh: can't access tty; job control turned off
random: fast init done
/ # Manipulations ari pamusoro achatipa guest system at least, pasina zvinhu zvakadai /proc kana zita rakapihwa rekutambira. Semuenzaniso, edza mirairo inotevera:
- uname -av
- cat /proc/self/pid
- hostname
Kuti ubude kunze kwemuenzi, nyora exit kana kudzvanya control-d. Izvi zvinouraya goko rinoteverwa ne kernel panic:
/ # exit
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
fish: “./linux root=/dev/root rootflag…” terminated by signal SIGABRT (Abort)
Isu tine iyi kernel panic nekuti iyo Linux kernel inofunga maitiro ekutanga anogara achimhanya. Pasina iyo, sisitimu haigone kushanda uye kuparara. Asi sezvo iyi iri mushandisi-modhi maitiro, mhedzisiro inobuda inozvitumira kune SIGABRT, izvo zvinoguma nekubuda.
Guest network setup
Uye apa ndipo panotanga kushata. Networking muMushandisi Mode Linux ndipo panotanga pfungwa yese yekugumira "mushandisi modhi" kuparara. Mushure mezvose, kazhinji padanho rehurongwa, network inogumira ropafadzo kuuraya modes kune isu tese zvikonzero zvinonzwisisika.
Cherechedza. per.: unogona kuverenga zvakawanda nezve sarudzo dzakasiyana dzekushanda netiweki muUML .
Rwendo rwekuenda kuSlirp
Zvakadaro, pane chishandiso chekare uye chinenge chisina kutsigirwa chinonzi , iyo Mushandisi Modhi Linux inogona kudyidzana netiweki. Inoshanda zvakanyanya senge mushandisi-level TCP/IP stack uye haidi chero mvumo yesystem kuti imhanye. Chombo ichi chaive yakabudiswa muna 1995, uye yazvino update ndeye date 2006. Slirp akura chaizvo. Munguva iyo pasina kutsigirwa uye zvigadziriso, vagadziri vaenda kure zvekuti ikozvino chishandiso ichi chinogona kungotsanangurwa se .
Saka ngatitorei Slirp kubva kuUbuntu repositori uye edza kuimhanyisa:
sudo apt-get install slirp
/usr/bin/slirp
Slirp v1.0.17 (BETA)
Copyright (c) 1995,1996 Danny Gasparovski and others.
All rights reserved.
This program is copyrighted, free software.
Please read the file COPYRIGHT that came with the Slirp
package for the terms and conditions of the copyright.
IP address of Slirp host: 127.0.0.1
IP address of your DNS(s): 1.1.1.1, 10.77.0.7
Your address is 10.0.2.15
(or anything else you want)
Type five zeroes (0) to exit.
[autodetect SLIP/CSLIP, MTU 1500, MRU 1500, 115200 baud]
SLiRP Ready ...
fish: “/usr/bin/slirp” terminated by signal SIGSEGV (Address boundary error)Oh vamwari. Ngatiisei Slirp's debugger uye tione kana tichigona kuona zviri kuitika pano:
sudo apt-get install gdb slirp-dbgsym
gdb /usr/bin/slirp
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/slirp...Reading symbols from /usr/lib/debug/.build-id/c6/2e75b69581a1ad85f72ac32c0d7af913d4861f.debug...done.
done.
(gdb) run
Starting program: /usr/bin/slirp
Slirp v1.0.17 (BETA)
Copyright (c) 1995,1996 Danny Gasparovski and others.
All rights reserved.
This program is copyrighted, free software.
Please read the file COPYRIGHT that came with the Slirp
package for the terms and conditions of the copyright.
IP address of Slirp host: 127.0.0.1
IP address of your DNS(s): 1.1.1.1, 10.77.0.7
Your address is 10.0.2.15
(or anything else you want)
Type five zeroes (0) to exit.
[autodetect SLIP/CSLIP, MTU 1500, MRU 1500, 115200 baud]
SLiRP Ready ...
Program received signal SIGSEGV, Segmentation fault.
ip_slowtimo () at ip_input.c:457
457 ip_input.c: No such file or directory.Kukanganisa kunokunda matiri . Ngatitarise iyo stacktrace, pamwe chimwe chinhu chichatibatsira ipapo:
(gdb) bt full
#0 ip_slowtimo () at ip_input.c:457
fp = 0x55784a40
#1 0x000055555556a57c in main_loop () at ./main.c:980
so = <optimized out>
so_next = <optimized out>
timeout = {tv_sec = 0, tv_usec = 0}
ret = 0
nfds = 0
ttyp = <optimized out>
ttyp2 = <optimized out>
best_time = <optimized out>
tmp_time = <optimized out>
#2 0x000055555555b116 in main (argc=1, argv=0x7fffffffdc58) at ./main.c:95
No locals.Pano tinoona kuti tsaona inoitika panguva yekutanga loop apo slirp inoedza kutarisa nguva yekubuda. Panguva iyi, ndaifanira kurega kuedza kugadzirisa. Asi ngationei kana Slirp yakavakwa kubva kumhando inoshanda. Ini zvakare kudhawunirodha archive zvakananga kubva saiti , nekuti kudhonza chimwe chinhu kubva ipapo kuburikidza nemutsara wekuraira kunorwadza:
cd ~/dl
wget https://xena.greedo.xeserv.us/files/slirp-1.0.16.tar.gz
tar xf slirp-1.0.16.tar.gz
cd slirp-1.0.16/src
./configure --prefix=$HOME/prefix/slirp
make
Pano tinoona chenjedzo pamusoro pezvisina kutsanangurwa zvakavakwa-mumabasa, ndiko kuti, nezvekusakwanisa kubatanidza mhedzisiro yebhinari faira. Zvinotaridza kuti pakati pa2006 nenzvimbo ino, gcc yakamira kugadzira zviratidzo zvinoshandiswa mumabasa akavakirwa-mukati emafaira epakati akaunganidzwa. Ngatiedze kutsiva keyword inline pane isina chinhu uye tarisa mhedzisiro:
vi slirp.h
:6
a
<enter>
#define inline /**/
<escape>
:wq
makeKwete. Izvi hazvishande futi. Kunyange zvakadaro haugone kuwana zviratidzo zveaya mabasa.
Panguva iyi, ndakakanda mapfumo pasi ndokutanga kutarisa Github . Dzidziso yangu yaive yekuti imwe Heroku kuvaka package yaizove nemabhinari andaida. Pakupedzisira, kutsvaka kwakanditungamirira . Ndakadhaunirodha ndokuburitsa uml.tar.gz uye akawana zvinotevera:
total 6136
-rwxr-xr-x 1 cadey cadey 79744 Dec 10 2017 ifconfig*
-rwxr-xr-x 1 cadey cadey 373 Dec 13 2017 init*
-rwxr-xr-x 1 cadey cadey 149688 Dec 10 2017 insmod*
-rwxr-xr-x 1 cadey cadey 66600 Dec 10 2017 route*
-rwxr-xr-x 1 cadey cadey 181056 Jun 26 2015 slirp*
-rwxr-xr-x 1 cadey cadey 5786592 Dec 15 2017 uml*
-rwxr-xr-x 1 cadey cadey 211 Dec 13 2017 uml_run*Iyi ndiyo bhinary inotsvedza! Anoshanda here?
./slirp
Slirp v1.0.17 (BETA) FULL_BOLT
Copyright (c) 1995,1996 Danny Gasparovski and others.
All rights reserved.
This program is copyrighted, free software.
Please read the file COPYRIGHT that came with the Slirp
package for the terms and conditions of the copyright.
IP address of Slirp host: 127.0.0.1
IP address of your DNS(s): 1.1.1.1, 10.77.0.7
Your address is 10.0.2.15
(or anything else you want)
Type five zeroes (0) to exit.
[autodetect SLIP/CSLIP, MTU 1500, MRU 1500]
SLiRP Ready ...
Haisi kuparara - saka inofanira kushanda! Ngatidyarei iyi binary mukati ~/bin/slirp:
cp slirp ~/bin/slirpKana mugadziri wepakeji akaibvisa, I .
Network setup
Zvino ngatimise network pane yedu yevaenzi kernel. :
linux
root=/dev/root
rootfstype=hostfs
rootflags=$HOME/prefix/uml-demo
rw
mem=64M
eth0=slirp,,$HOME/bin/slirp
init=/bin/shZvino ngatibatidze network:
mount -t proc proc proc/
mount -t sysfs sys sys/
ifconfig eth0 10.0.2.14 netmask 255.255.255.240 broadcast 10.0.2.15
route add default gw 10.0.2.2
Mitemo miviri yekutanga yekugadzirisa /proc и /sys zvinodiwa pabasa ifconfig, iyo inogadzirisa network interface yekutaurirana neSlirp. Team route inoseta kernel routing tafura kumanikidza traffic yese kutumirwa kuburikidza neSlirp tunnel. Ngatitarisei izvi nemubvunzo weDNS:
nslookup google.com 8.8.8.8
Server: 8.8.8.8
Address 1: 8.8.8.8 dns.google
Name: google.com
Address 1: 172.217.12.206 lga25s63-in-f14.1e100.net
Address 2: 2607:f8b0:4006:81b::200e lga25s63-in-x0e.1e100.netInoshanda!
Cherechedzo pa .: Sezviri pachena, iyo yekutanga positi yakanyorwa padesktop ine wired network kadhi, kana kumwe kurongeka kwaisada mamwe madhiraivha. Palaptop ine WiFi 8265 kubva kuIntel, kukanganisa kunoitika pakusimudza network
/ # ifconfig eth0 10.0.2.14 netmask 255.255.255.240 broadcast 10.0.2.15
slirp_tramp failed - errno = 2
ifconfig: ioctl 0x8914 failed: No such file or directory
/ #Sezviri pachena, kernel haigone kutaurirana netiweki kadhi mutyairi. Kuedza kuunganidza firmware mu kernel, zvinosuruvarisa, haina kugadzirisa mamiriro acho ezvinhu. Panguva yekubudiswa, zvakanga zvisingabviri kuwana mhinduro mukugadzirisa uku. Pazvigadziriso zviri nyore (semuenzaniso, muVirtualbox), iyo interface inosimuka nemazvo.
Ngatiite otomatiki iyo redirect neinotevera shell script:
#!/bin/sh
# init.sh
mount -t proc proc proc/
mount -t sysfs sys sys/
ifconfig eth0 10.0.2.14 netmask 255.255.255.240 broadcast 10.0.2.15
route add default gw 10.0.2.2
echo "networking set up"
exec /tini /bin/shUye imake iyo inokwanisika:
chmod +x init.shUye ipapo isu tichaita shanduko kune kernel command line:
linux
root=/dev/root
rootfstype=hostfs
rootflags=$HOME/prefix/uml-demo
rw
mem=64M
eth0=slirp,,$HOME/bin/slirp
init=/init.sh
Uye ngatidzokorore:
SLiRP Ready ...
networking set up
/bin/sh: can't access tty; job control turned off
nslookup google.com 8.8.8.8
Server: 8.8.8.8
Address 1: 8.8.8.8 dns.google
Name: google.com
Address 1: 172.217.12.206 lga25s63-in-f14.1e100.net
Address 2: 2607:f8b0:4004:800::200e iad30s09-in-x0e.1e100.netNetwork yakagadzikana!
docker file
Kuti zvive nyore kwauri kuti utarise zvese izvi, ndaunganidza , iyo inogadzirisa akawanda ematanho anotsanangurwa uye inofanira kukupa iwe kushanda kugadzirisa. neniwo ndaita , iyo ine zvese zvinotsanangurwa mupositi. Asi zvakakosha kuti unzwisise kuti pano ndangodonongodza zvishoma zvigadziriso.
Ndinovimba iyi post yakubatsira iwe kuti unzwisise nzira yekusimudza muenzi kernel. Yakazove imwe rudzi rwechikara, asi chinyorwa ichi chakatorwa segwara rakazara pakuvaka, kuisa uye kugadzirisa Mushandisi Modhi muLinux pasi peshanduro dzemazuva ano dzemashandisirwo emhuri iyi. Matanho anotevera anofanirwa kusanganisira kuisa masevhisi uye imwe software yatove mukati meiyo yevaenzi system. Sezvo Docker mudziyo mifananidzo ichingoshambadzirwa tarballs, iwe unofanirwa kukwanisa kubvisa mufananidzo kuburikidza docker export, uye wozoona nzira yekuisa mumudzi wemuenzi kernel's file system. Zvakanaka, wobva waita iyo shell script.
Kutenda kwakakosha kuna Rkeene kubva ku #lobsters paFreenode. Pasina rubatsiro rwake kugadzirisa Slirp, ndingadai ndisina kusvika apa. Ini handina zano rekuti Slackware system yake inoshanda sei nemazvo nekutsvedza, asi yangu Ubuntu neAlpine masisitimu haana kugamuchira kutsvedza uye iyo binary Rkeene yakandikurudzira. Asi zvakandikwanira kuti pane chimwe chinhu chinondiitira.
Source: www.habr.com