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Unikraft – Crafting Unikernels
Simon Kuenzer, Felipe Huici, Florian Schmidt
<firstname.lastname>@neclab.eu
SYSML Group
NEC Laboratories Europe
http://sysml.neclab.eu
2 © NEC Corporation 2017
Advantages and the Problem with Specialization
▌Standard OS/VM/container image:
lots of unnecessary code
lots of overhead!
Nginx
Kernel
Services
Libraries
User Application
m em cached bash
3rd Party
Applications
libc
libssl
ssh
init
ext4 netfront
blkfront
Nginx
m em cached
bash
libc
libssl
ssh
init
ext4
netfront
blkfront
▌Specialized image: only what’s
needed is there but lots of
development time! (have to
change code by hand
Nginx
Kernel
Services
Libraries
User Application
m em cached bash
3rd Party
Applications
libc
libssl
ssh
init
ext4 netfront
blkfront
unused!
unused!
unused!
3 © NEC Corporation 2017
Unikraft: The Insight
▌In a perfect world…
We would have a menu of libraries for all possible components applications
might need
We would be able to use that menu to select only the functionality needed (and
possibly automate the selection process)
A system would automatically build a lean, high performance image for the
application we’re interested in and the platforms we care for
Unikraft is precisely this system!
4 © NEC Corporation 2017
Unikraft – Operating System Decomposition
▌Standard operating systems are monolithic: they are not modular
so it’s not possible to separate their parts
Application(s)
profiling
memory
allocator scheduler
drivers
timers
filesystem
network stack
5 © NEC Corporation 2017
Unikraft – Operating System Decomposition
▌Could we decompose, i.e., break apart an operating system?
network stack
Application(s)
profiling
filesystem
memory
allocator
timers
scheduler
drivers
6 © NEC Corporation 2017
Unikraft – Operating System Decomposition
▌Could we decompose, i.e., break apart an operating system?
network stack
Application(s)
profiling
filesystem
memory
allocator
timers
scheduler
drivers
Once decomposed, we can pick and
choose which parts/libraries we
actually need for our application!
7 © NEC Corporation 2017
The Unikraft Library and Build System
arch lib
pool
platform lib
pool
unikernel
binaries
main
lib
pool
CUSTOM
ABI/API
libmipsarch.olibarm32arch.olibx86_64arch.o
libkvmplat.olibxenplat.oliblinuxuplat.olibbareplat.o
unikraft_linuxuunikraft_bare_x86_64
unikraft_bare_ARM32
unikraft_bare_MIPS
unikraft_xen_x86_64
unikraft_xen_ARM32
unikraft_xen_MIPS
unikraft_kvm_x86_64
unikraft_kvm_ARM32
unikraft_kvm_MIPS
RUNBUILDSELECT&CONFIGLIBS
SELECT
APP
1234
snort
mysql QEMU
nginx memcached
mailman
myapp
drivers
libconsole.o
libixgbe.o
libnetfront.o
network stack
liblwip.o
libtcpip.o
libhttp.o
memory allocators
libbuddy.o
libheap.o
libmempool.o
filesystems
libvfs.o
libfat.o
libext3.o
runtimes
libocaml.o
libpython.o
liberlang.o
schedulers
libcoop.o
libpreempt.o
librt.o
debug&profiling
libgdb.o
libucdebug.o
libperf.o
standard libs
libc.o
libnewlibc.o
libopenssl.o
8 © NEC Corporation 2017
Building a Specialized Image in One Minute
▌Type “make menuconfig”
▌Choose options in the menu that you want for your application
▌Choose your target platform(s) (e.g., Xen, KVM, Linux, baremetal)
▌Save config and type “make”
9 © NEC Corporation 2017
An Unikraft Image Example
▌Xen PV x86_64 binary
▌Compiles to a 32.7kB image
▌Boots and prints message to debug console (with min. 208kB RAM)
libnolibc.o
libukboot.o
libukdebug.o
libxenplat.o
unikraft_xen-x86_64.o (50,2kB)
unikraft_xen-x86_64
(32,7kB)
Final
linking
10 © NEC Corporation 2017
Potential Unikraft-built Systems
▌Specialized Python images for Xen, KVM and ARM, x86_64
liballocbuddy.o
libxenplat.o libarmarch.o
libconsole.o
libfilesystem.o
liblwip.o
libschedrr.o
libpython.o
▌Verticals:
IoT gateways
Smart city gateways
Cloud computing platforms (e.g., AWS Lambda)
11 © NEC Corporation 2017
Potential Unikraft-built Systems
▌Specialized NFV image for KVM on x86_64
liballocbuddy.o
libkvmlat.o libx86_64arch.o
libconsole.olibschedcoop.o
▌Verticals:
 vCPE
 vRouters
 vBRAS
 Your network application here!
libdpdk.o

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Unikraft Landing Page Master Slides

  • 1. Unikraft – Crafting Unikernels Simon Kuenzer, Felipe Huici, Florian Schmidt <firstname.lastname>@neclab.eu SYSML Group NEC Laboratories Europe http://sysml.neclab.eu
  • 2. 2 © NEC Corporation 2017 Advantages and the Problem with Specialization ▌Standard OS/VM/container image: lots of unnecessary code lots of overhead! Nginx Kernel Services Libraries User Application m em cached bash 3rd Party Applications libc libssl ssh init ext4 netfront blkfront Nginx m em cached bash libc libssl ssh init ext4 netfront blkfront ▌Specialized image: only what’s needed is there but lots of development time! (have to change code by hand Nginx Kernel Services Libraries User Application m em cached bash 3rd Party Applications libc libssl ssh init ext4 netfront blkfront unused! unused! unused!
  • 3. 3 © NEC Corporation 2017 Unikraft: The Insight ▌In a perfect world… We would have a menu of libraries for all possible components applications might need We would be able to use that menu to select only the functionality needed (and possibly automate the selection process) A system would automatically build a lean, high performance image for the application we’re interested in and the platforms we care for Unikraft is precisely this system!
  • 4. 4 © NEC Corporation 2017 Unikraft – Operating System Decomposition ▌Standard operating systems are monolithic: they are not modular so it’s not possible to separate their parts Application(s) profiling memory allocator scheduler drivers timers filesystem network stack
  • 5. 5 © NEC Corporation 2017 Unikraft – Operating System Decomposition ▌Could we decompose, i.e., break apart an operating system? network stack Application(s) profiling filesystem memory allocator timers scheduler drivers
  • 6. 6 © NEC Corporation 2017 Unikraft – Operating System Decomposition ▌Could we decompose, i.e., break apart an operating system? network stack Application(s) profiling filesystem memory allocator timers scheduler drivers Once decomposed, we can pick and choose which parts/libraries we actually need for our application!
  • 7. 7 © NEC Corporation 2017 The Unikraft Library and Build System arch lib pool platform lib pool unikernel binaries main lib pool CUSTOM ABI/API libmipsarch.olibarm32arch.olibx86_64arch.o libkvmplat.olibxenplat.oliblinuxuplat.olibbareplat.o unikraft_linuxuunikraft_bare_x86_64 unikraft_bare_ARM32 unikraft_bare_MIPS unikraft_xen_x86_64 unikraft_xen_ARM32 unikraft_xen_MIPS unikraft_kvm_x86_64 unikraft_kvm_ARM32 unikraft_kvm_MIPS RUNBUILDSELECT&CONFIGLIBS SELECT APP 1234 snort mysql QEMU nginx memcached mailman myapp drivers libconsole.o libixgbe.o libnetfront.o network stack liblwip.o libtcpip.o libhttp.o memory allocators libbuddy.o libheap.o libmempool.o filesystems libvfs.o libfat.o libext3.o runtimes libocaml.o libpython.o liberlang.o schedulers libcoop.o libpreempt.o librt.o debug&profiling libgdb.o libucdebug.o libperf.o standard libs libc.o libnewlibc.o libopenssl.o
  • 8. 8 © NEC Corporation 2017 Building a Specialized Image in One Minute ▌Type “make menuconfig” ▌Choose options in the menu that you want for your application ▌Choose your target platform(s) (e.g., Xen, KVM, Linux, baremetal) ▌Save config and type “make”
  • 9. 9 © NEC Corporation 2017 An Unikraft Image Example ▌Xen PV x86_64 binary ▌Compiles to a 32.7kB image ▌Boots and prints message to debug console (with min. 208kB RAM) libnolibc.o libukboot.o libukdebug.o libxenplat.o unikraft_xen-x86_64.o (50,2kB) unikraft_xen-x86_64 (32,7kB) Final linking
  • 10. 10 © NEC Corporation 2017 Potential Unikraft-built Systems ▌Specialized Python images for Xen, KVM and ARM, x86_64 liballocbuddy.o libxenplat.o libarmarch.o libconsole.o libfilesystem.o liblwip.o libschedrr.o libpython.o ▌Verticals: IoT gateways Smart city gateways Cloud computing platforms (e.g., AWS Lambda)
  • 11. 11 © NEC Corporation 2017 Potential Unikraft-built Systems ▌Specialized NFV image for KVM on x86_64 liballocbuddy.o libkvmlat.o libx86_64arch.o libconsole.olibschedcoop.o ▌Verticals:  vCPE  vRouters  vBRAS  Your network application here! libdpdk.o