https://github.com/cfsamson/examples-containers
Following along https://www.youtube.com/watch?v=8fi7uSYlOdc in Rust
https://github.com/cfsamson/examples-containers
Last synced: 2 months ago
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Following along https://www.youtube.com/watch?v=8fi7uSYlOdc in Rust
- Host: GitHub
- URL: https://github.com/cfsamson/examples-containers
- Owner: cfsamson
- Created: 2021-03-14T22:02:20.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2021-03-16T00:11:34.000Z (over 4 years ago)
- Last Synced: 2025-02-09T22:24:51.244Z (4 months ago)
- Language: Rust
- Size: 5.86 KB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Containers
Following along Liz Rice's presentation from GOTO 2018 (https://www.youtube.com/watch?v=8fi7uSYlOdc)
in Rust.
The presentation is done with GO and the defalut "Command" interface, along with
the "syscall" package in GO makes this example quite a bit easier to follow.
It turns out to be a bit more difficult to follow in Rust but I figured it would
be a good example to show some basic FFI and walk through some edge cases often
encountered crossing FFI boundaries in Rust (Trait objects / wide pointers).
Even if the complexity is a bit higher in the start it becomes less complex
since we have a way to execute code in the new process before we execute the
new process image typically invoced using the "Command" interface in both
Rust and GO.
## Create a new file system
`sudo` is needed in WSL since you can't run as root.
```text
chr=/home/dev/test/container-root
mkdir -p $chr
mkdir -p $chr/{bin,lib,lib64,proc}
cd $chr
sudo cp -v /bin/{bash,touch,ls,rm, ps, mount, sleep} $chr/bin
list="$(ldd /bin/bash | egrep -o '/lib.*\.[0-9]*')"
echo $list # optional
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/touch | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/ls | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/ls | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/ps | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/mount | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
list="$(ldd /bin/sleep | egrep -o '/lib.*\.[0-9]*')"
for i in $list; do sudo cp -v --parents "$i" "/home/dev/test/container-root"; done
```
## Running in WSL
Since WSL doesn't allow you to run as root, you need to do `cargo build`, and
then `sudo ./target/debug/containers run /bin/bash` to run the example.