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3 changes: 3 additions & 0 deletions library/mongo/8.2.3/.dockerignore
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/Makefile.uk
/.unikraft/
/.config*
4 changes: 4 additions & 0 deletions library/mongo/8.2.3/.gitignore
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/Makefile.uk
/.unikraft/
/.config*
/build.*
90 changes: 90 additions & 0 deletions library/mongo/8.2.3/Dockerfile
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FROM mongo:8.2.3 as build

RUN apt-get update && apt-get install -y binutils && \
strip --strip-all /usr/bin/mongod && \
mkdir /home/tmp

FROM alpine:3 AS sys

RUN set -xe; \
mkdir -p /target/etc; \
mkdir -p /blank; \
apk --no-cache add \
ca-certificates \
tzdata \
; \
update-ca-certificates; \
ln -sf ../usr/share/zoneinfo/Etc/UTC /target/etc/localtime; \
echo "Etc/UTC" > /target/etc/timezone; \
# Create fake /sys/devices/system/cpu for tcmalloc
mkdir -p /target/sys/devices/system/cpu/cpu0/cache/index3; \
mkdir -p /target/sys/devices/system/cpu/cpu0/topology; \
mkdir -p /target/sys/devices/system/node/node0; \
mkdir -p /target/sys/fs/cgroup; \
echo "0" > /target/sys/devices/system/cpu/possible; \
echo "0" > /target/sys/devices/system/cpu/online; \
echo "0" > /target/sys/devices/system/cpu/present; \
echo "0" > /target/sys/devices/system/node/node0/cpulist; \
echo "0" > /target/sys/devices/system/cpu/cpu0/cache/index3/shared_cpu_list; \
echo "0" > /target/sys/devices/system/cpu/cpu0/topology/core_cpus_list; \
echo "0" > /target/sys/devices/system/cpu/cpu0/topology/physical_package_id; \
echo "0" > /target/sys/devices/system/cpu/cpu0/topology/core_id; \
echo "max" > /target/sys/fs/cgroup/memory.max; \
# Create fake /proc files
mkdir -p /target/proc/sys/crypto; \
printf "processor\t: 0\nvendor_id\t: GenuineIntel\ncpu family\t: 6\nmodel\t\t: 158\nmodel name\t: Intel Core\nstepping\t: 10\ncpu MHz\t\t: 2400.000\ncache size\t: 8192 KB\nphysical id\t: 0\nsiblings\t: 1\ncore id\t\t: 0\ncpu cores\t: 1\nflags\t\t: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat\nbogomips\t: 4800.00\nclflush size\t: 64\ncache_alignment\t: 64\naddress sizes\t: 39 bits physical, 48 bits virtual\n\n" > /target/proc/cpuinfo; \
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why this?

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@vTusharr vTusharr Jan 30, 2026

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mongo using tcmalloc (https://www.mongodb.com/docs/manual/administration/tcmalloc-performance/)
so i did this to give cpu info for debugging

echo "0" > /target/proc/sys/crypto/fips_enabled; \
echo "1" > /target/proc/stat; \
mkdir -p /target/etc/gnutls; \
touch /target/etc/gnutls/config;

FROM scratch

COPY --from=sys /target/etc /etc
COPY --from=sys /usr/share/zoneinfo/Etc/UTC /usr/share/zoneinfo/Etc/UTC
COPY --from=sys /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
COPY --from=sys /blank /tmp
COPY --from=sys /target/sys /sys
COPY --from=sys /target/proc /proc

# OpenSSl cfg
COPY --from=build /usr/lib/ssl/openssl.cnf /usr/lib/ssl/openssl.cnf

# Binary executable
COPY --from=build /usr/bin/mongod /usr/bin/mongod

# System libraries
COPY --from=build /lib64/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2
COPY --from=build /lib/x86_64-linux-gnu/libcurl.so.4 /lib/x86_64-linux-gnu/libcurl.so.4
COPY --from=build /lib/x86_64-linux-gnu/libssl.so.3 /lib/x86_64-linux-gnu/libssl.so.3
COPY --from=build /lib/x86_64-linux-gnu/libcrypto.so.3 /lib/x86_64-linux-gnu/libcrypto.so.3
COPY --from=build /lib/x86_64-linux-gnu/libresolv.so.2 /lib/x86_64-linux-gnu/libresolv.so.2
COPY --from=build /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/libm.so.6
COPY --from=build /lib/x86_64-linux-gnu/libgcc_s.so.1 /lib/x86_64-linux-gnu/libgcc_s.so.1
COPY --from=build /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libc.so.6
COPY --from=build /lib/x86_64-linux-gnu/libnghttp2.so.14 /lib/x86_64-linux-gnu/libnghttp2.so.14
COPY --from=build /lib/x86_64-linux-gnu/libidn2.so.0 /lib/x86_64-linux-gnu/libidn2.so.0
COPY --from=build /lib/x86_64-linux-gnu/librtmp.so.1 /lib/x86_64-linux-gnu/librtmp.so.1
COPY --from=build /lib/x86_64-linux-gnu/libssh.so.4 /lib/x86_64-linux-gnu/libssh.so.4
COPY --from=build /lib/x86_64-linux-gnu/libpsl.so.5 /lib/x86_64-linux-gnu/libpsl.so.5
COPY --from=build /lib/x86_64-linux-gnu/libgssapi_krb5.so.2 /lib/x86_64-linux-gnu/libgssapi_krb5.so.2
COPY --from=build /lib/x86_64-linux-gnu/libldap.so.2 /lib/x86_64-linux-gnu/libldap.so.2
COPY --from=build /lib/x86_64-linux-gnu/liblber.so.2 /lib/x86_64-linux-gnu/liblber.so.2
COPY --from=build /lib/x86_64-linux-gnu/libzstd.so.1 /lib/x86_64-linux-gnu/libzstd.so.1
COPY --from=build /lib/x86_64-linux-gnu/libbrotlidec.so.1 /lib/x86_64-linux-gnu/libbrotlidec.so.1
COPY --from=build /lib/x86_64-linux-gnu/libz.so.1 /lib/x86_64-linux-gnu/libz.so.1
COPY --from=build /lib/x86_64-linux-gnu/libunistring.so.5 /lib/x86_64-linux-gnu/libunistring.so.5
COPY --from=build /lib/x86_64-linux-gnu/libgnutls.so.30 /lib/x86_64-linux-gnu/libgnutls.so.30
COPY --from=build /lib/x86_64-linux-gnu/libhogweed.so.6 /lib/x86_64-linux-gnu/libhogweed.so.6
COPY --from=build /lib/x86_64-linux-gnu/libnettle.so.8 /lib/x86_64-linux-gnu/libnettle.so.8
COPY --from=build /lib/x86_64-linux-gnu/libgmp.so.10 /lib/x86_64-linux-gnu/libgmp.so.10
COPY --from=build /lib/x86_64-linux-gnu/libkrb5.so.3 /lib/x86_64-linux-gnu/libkrb5.so.3
COPY --from=build /lib/x86_64-linux-gnu/libk5crypto.so.3 /lib/x86_64-linux-gnu/libk5crypto.so.3
COPY --from=build /lib/x86_64-linux-gnu/libcom_err.so.2 /lib/x86_64-linux-gnu/libcom_err.so.2
COPY --from=build /lib/x86_64-linux-gnu/libkrb5support.so.0 /lib/x86_64-linux-gnu/libkrb5support.so.0
COPY --from=build /lib/x86_64-linux-gnu/libsasl2.so.2 /lib/x86_64-linux-gnu/libsasl2.so.2
COPY --from=build /lib/x86_64-linux-gnu/libbrotlicommon.so.1 /lib/x86_64-linux-gnu/libbrotlicommon.so.1
COPY --from=build /lib/x86_64-linux-gnu/libp11-kit.so.0 /lib/x86_64-linux-gnu/libp11-kit.so.0
COPY --from=build /lib/x86_64-linux-gnu/libtasn1.so.6 /lib/x86_64-linux-gnu/libtasn1.so.6
COPY --from=build /lib/x86_64-linux-gnu/libkeyutils.so.1 /lib/x86_64-linux-gnu/libkeyutils.so.1
COPY --from=build /lib/x86_64-linux-gnu/libffi.so.8 /lib/x86_64-linux-gnu/libffi.so.8
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Missing some copies here compared to 6.0 is this intentional?

142 changes: 142 additions & 0 deletions library/mongo/8.2.3/Kraftfile
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spec: v0.6

name: mongo

rootfs: ./Dockerfile

cmd: ["/usr/bin/mongod", "--bind_ip_all"]

template:
source: https://github.com/unikraft/app-elfloader.git
version: staging

unikraft:
source: https://github.com/unikraft/unikraft.git
version: staging
kconfig:
# Configurations options for app-elfloader
# (they can't be part of the template atm)
CONFIG_LIBPOSIX_PROCESS_ARCH_PRCTL: 'y'
CONFIG_APPELFLOADER_BRK: 'y'
CONFIG_APPELFLOADER_CUSTOMAPPNAME: 'y'
CONFIG_APPELFLOADER_STACK_NBPAGES: 512
CONFIG_APPELFLOADER_VFSEXEC_EXECBIT: 'n'
CONFIG_APPELFLOADER_VFSEXEC: 'y'
CONFIG_APPELFLOADER_AUTOGEN_REPLACEEXIST: 'y'
# Architecture - use generic to avoid AVX requirement at boot
# The loaded binary (mongod) may still use AVX instructions
CONFIG_MARCH_X86_64_GENERIC: 'y'
# Debugging
CONFIG_LIBUKDEBUG_PRINTK_INFO: 'y'
CONFIG_LIBUKDEBUG_PRINTK_DEBUG: 'y'
# Unikraft options
CONFIG_HAVE_PAGING_DIRECTMAP: 'y'
CONFIG_HAVE_PAGING: 'y'
CONFIG_I8042: 'y'
CONFIG_LIBDEVFS_AUTOMOUNT: 'y'
CONFIG_LIBDEVFS_DEV_NULL: 'y'
CONFIG_LIBDEVFS_DEV_STDOUT: 'y'
CONFIG_LIBDEVFS_DEV_ZERO: 'y'
CONFIG_LIBDEVFS: 'y'
CONFIG_LIBPOSIX_ENVIRON_ENVP0: "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
CONFIG_LIBPOSIX_ENVIRON_ENVP1: "LD_LIBRARY_PATH=/usr/local/lib:/usr/lib:/lib"
CONFIG_LIBPOSIX_ENVIRON_ENVP2: "HOME=/"
CONFIG_LIBPOSIX_ENVIRON_ENVP3: "TCMALLOC_OVERRIDE_NPROCS=1"
CONFIG_LIBPOSIX_ENVIRON_ENVP4: "PERCPU_ARENA=phycpu"
CONFIG_LIBPOSIX_ENVIRON: 'y'
CONFIG_LIBPOSIX_ENVIRON_LIBPARAM: 'y'
CONFIG_LIBPOSIX_ENVIRON_LIBPARAM_MAXCOUNT: '64'
CONFIG_LIBPOSIX_EVENTFD: 'y'
CONFIG_LIBPOSIX_FDIO: 'y'
CONFIG_LIBPOSIX_FDTAB: 'y'
CONFIG_LIBPOSIX_FUTEX: 'y'
CONFIG_LIBPOSIX_MMAP: 'y'
CONFIG_LIBPOSIX_PIPE: 'y'
CONFIG_LIBPOSIX_POLL: 'y'
CONFIG_LIBPOSIX_PROCESS: 'y'
CONFIG_LIBPOSIX_PROCESS_MULTITHREADING: 'y'
CONFIG_LIBPOSIX_SOCKET: 'y'
CONFIG_LIBPOSIX_SYSINFO: 'y'
CONFIG_LIBPOSIX_TIME: 'y'
CONFIG_LIBPOSIX_TIMERFD: 'y'
CONFIG_LIBPOSIX_UNIXSOCKET: 'y'
CONFIG_LIBPOSIX_USER_GID: 0
CONFIG_LIBPOSIX_USER_GROUPNAME: "root"
CONFIG_LIBPOSIX_USER_UID: 0
CONFIG_LIBPOSIX_USER_USERNAME: "root"
CONFIG_LIBPOSIX_USER: 'y'
CONFIG_LIBRAMFS: 'y'
CONFIG_LIBSYSCALL_SHIM_HANDLER_ULTLS: 'y'
CONFIG_LIBSYSCALL_SHIM_HANDLER: 'y'
CONFIG_LIBSYSCALL_SHIM_LEGACY_VERBOSE: 'n'
CONFIG_LIBSYSCALL_SHIM: 'y'
CONFIG_LIBUKALLOCPOOL: 'y'
CONFIG_LIBUKBLKDEV_MAXNBQUEUES: '1'
CONFIG_LIBUKBLKDEV_DISPATCHERTHREADS: 'y'
CONFIG_LIBUKBLKDEV_SYNC_IO_BLOCKED_WAITING: 'y'
CONFIG_LIBUKBLKDEV: 'y'
CONFIG_LIBUKBOOT_BANNER_MINIMAL: 'y'
CONFIG_LIBUKBOOT_HEAP_BASE: '0x400000000'
CONFIG_LIBUKBOOT_MAINTHREAD: 'y'
CONFIG_LIBUKBOOT_SHUTDOWNREQ_HANDLER: 'y'
CONFIG_LIBUKCPIO: 'y'
CONFIG_LIBUKDEBUG_CRASH_SCREEN: 'y'
CONFIG_LIBUKDEBUG_ENABLE_ASSERT: 'y'
CONFIG_LIBUKDEBUG_PRINT_SRCNAME: 'n'
CONFIG_LIBUKDEBUG_PRINT_TIME: 'y'
CONFIG_LIBUKDEBUG_PRINTK_ERR: 'y'
CONFIG_LIBUKDEBUG_PRINTK: 'y'
CONFIG_LIBUKDEBUG: 'y'
CONFIG_LIBUKFALLOC: 'y'
CONFIG_LIBUKMPI: 'n'
CONFIG_LIBUKSIGNAL: 'y'
CONFIG_LIBUKRANDOM_DEVFS: 'y'
CONFIG_LIBUKRANDOM: 'y'
CONFIG_LIBUKRANDOM_GETRANDOM: 'y'
CONFIG_LIBUKVMEM_DEFAULT_BASE: '0x0000001000000000'
CONFIG_LIBUKVMEM_DEMAND_PAGE_IN_SIZE: 12
CONFIG_LIBUKVMEM_PAGEFAULT_HANDLER_PRIO: 4
CONFIG_LIBUKVMEM: 'y'
CONFIG_LIBVFSCORE_AUTOMOUNT_CI: 'y'
CONFIG_LIBVFSCORE_AUTOMOUNT_CI_EINITRD: 'y'
CONFIG_LIBVFSCORE_NONLARGEFILE: 'y'
CONFIG_LIBVFSCORE: 'y'
CONFIG_OPTIMIZE_DEADELIM: 'y'
CONFIG_OPTIMIZE_LTO: 'y'
CONFIG_PAGING: 'y'
CONFIG_STACK_SIZE_PAGE_ORDER: 4 # 128 * 4K = 512K
CONFIG_UKPLAT_MEMREGION_MAX_COUNT: 64
CONFIG_LIBUKNETDEV_EINFO_LIBPARAM: 'y'

# Debug options
# CONFIG_LIBUKDEBUG_PRINTD: 'y'
CONFIG_LIBUKDEBUG_PRINTK_INFO: 'y'
CONFIG_LIBSYSCALL_SHIM_STRACE: 'n'
# CONFIG_LIBSYSCALL_SHIM_DEBUG: 'y'

libraries:
lwip:
source: https://github.com/unikraft/lib-lwip.git
version: staging
kconfig:
CONFIG_LWIP_TCP: 'y'
CONFIG_LWIP_UDP: 'y'
CONFIG_LWIP_RAW: 'y'
CONFIG_LWIP_WND_SCALE: 'y'
CONFIG_LWIP_TCP_KEEPALIVE: 'y'
CONFIG_LWIP_THREADS: 'y'
CONFIG_LWIP_HEAP: 'y'
CONFIG_LWIP_SOCKET: 'y'
CONFIG_LWIP_AUTOIFACE: 'y'
CONFIG_LWIP_NUM_TCPCON: 64
CONFIG_LWIP_NUM_TCPLISTENERS: 64
CONFIG_LWIP_ICMP: 'y'
CONFIG_LWIP_DHCP: 'y'
CONFIG_LWIP_DNS: 'n'
libelf:
source: https://github.com/unikraft/lib-libelf.git
version: staging

targets:
- fc/x86_64
- qemu/x86_64
74 changes: 74 additions & 0 deletions library/mongo/8.2.3/README.md
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# MongoDB

This directory contains the [MongoDB](https://www.mongodb.com/) runtime on Unikraft, in binary compatibility mode.
It starts a MongoDB server instance on Unikraft.

## Run and Use

Use `kraft` to run the image and start a Unikraft instance:

```bash
kraft run --rm -M 1024M -p 27017:27017 --plat qemu --arch x86_64 unikraft.org/mongo:6.0
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```

If the `--plat` argument is left out, it defaults to `qemu`.
If the `--arch` argument is left out, it defaults to your system's CPU architecture.

Once executed, it will open port `27017` and wait for connections.
To test it, use the [`mongo` shell](https://www.mongodb.com/docs/v4.4/mongo/):

```bash
mongo
```

## Inspect and Close

To list information about the Unikraft instance, use:

```bash
kraft ps -a
```

```text
NAME KERNEL ARGS CREATED STATUS MEM PORTS PLAT
pedantic_snowflake project://mongo:qemu/x86_64 /usr/bin/mongod --bind_ip_all 6 seconds ago running 976M 0.0.0.0:27017->27017/tcp qemu/x86_64
```

The instance name is `pedantic_snowflake`.
To close the Unikraft instance, close the `kraft` process (e.g., via `Ctrl+c`) or run:

```bash
kraft rm pedantic_snowflake
```

## Build and Run Locally

The commands so far used the pre-built MongoDB image available in the Unikraft registry.

In order to to build a local MongoDB image, clone this repository and `cd` into this directory.
Then use `kraft` to build an image locally:

```bash
kraft build --no-cache --no-update --plat qemu --arch x86_64
```

Similar to the `kraft run` command, if the `--plat` argument is left out, it defaults to `qemu`.
If the `--arch` argument is left out, it defaults to your system's CPU architecture.

In order to run the locally built image, use `.` (_dot_, the current directory) as the final argument to the `kraft run` command:

```bash
kraft run --rm -M 1024M -p 27017:27017 --plat qemu --arch x86_64 .
```

Same as above, it will open port `27017` and wait for connections.

## `kraft` and `sudo`

Mixing invocations of `kraft` and `sudo` can lead to unexpected behavior.
Read more about how to start `kraft` without `sudo` at [https://unikraft.org/sudoless](https://unikraft.org/sudoless).

## Learn More

- [How to run unikernels locally](https://unikraft.org/docs/cli/running)
- [How to build `Dockerfile` root filesystems with BuildKit](https://unikraft.org/guides/building-dockerfile-images-with-buildkit)