Rust Linux Worker

The Rust Linux Worker Service executes arbitrary Linux commands on behalf of clients. Processes are isolated to a basic Alpine Linux container using Linux namespaces and resource constraints are provided using cgroups.

The primary purpose of this project was to allow me to experiment with rust by building a project similar to a previous one (see Go Linux Worker).

Currently, the service consists of a library with functions to submit a job, query the status of a job, stop a job and fetch the logs from a job along with client and server implementations.

Building

The standard cargo tool can be use to build, test and check the code. A makefile is also provided to easily build a docker image to run the server:

make docker-build

Running

The server can be run using the built Docker image by running:

make docker-run

The client can be run using:

# Submit a job
$ ./bin/client submit "ls -lah /"
Id of submitted job: 58403eaf-6691-4796-9b9c-cb60d9dc1763

# Get the status of the job
$ ./bin/client status 58403eaf-6691-4796-9b9c-cb60d9dc1763
Status: COMPLETED
Exit code: 0

# Get the output from the job
$ ./bin/client logs 58403eaf-6691-4796-9b9c-cb60d9dc1763
total 0
drwxr-xr-x   19 root     root         380 Apr 26 19:48 .
drwxr-xr-x   19 root     root         380 Apr 26 19:48 ..
drwxr-xr-x    2 root     root        1.6K Apr 26 19:48 bin
drwxr-xr-x    2 root     root          40 Feb 17 15:07 dev
drwxr-xr-x   15 root     root         700 Apr 26 19:48 etc
drwxr-xr-x    2 root     root          40 Feb 17 15:07 home
drwxr-xr-x    7 root     root         280 Apr 26 19:48 lib
drwxr-xr-x    5 root     root         100 Apr 26 19:48 media
drwxr-xr-x    2 root     root          40 Feb 17 15:07 mnt
drwxr-xr-x    2 root     root          40 Feb 17 15:07 opt
dr-xr-xr-x  171 root     root           0 Apr 26 19:48 proc
drwx------    2 root     root          40 Feb 17 15:07 root
drwxr-xr-x    2 root     root          40 Feb 17 15:07 run
drwxr-xr-x    2 root     root        1.2K Apr 26 19:48 sbin
drwxr-xr-x    2 root     root          40 Feb 17 15:07 srv
drwxr-xr-x    2 root     root          40 Feb 17 15:07 sys
drwxrwxrwt    2 root     root          40 Feb 17 15:07 tmp
drwxr-xr-x    7 root     root         140 Apr 26 19:48 usr
drwxr-xr-x   12 root     root         260 Apr 26 19:48 var

# Submit a job
$ ./bin/client sugmit "sleep 10m"
Id of submitted job: fc5aa11b-7f1c-4435-8c7b-aee3e0f09b7f

# Get the status of the job
$ ./bin/client status fc5aa11b-7f1c-4435-8c7b-aee3e0f09b7f
Status: RUNNING

# Stop the job
$ ./bin/client stop fc5aa11b-7f1c-4435-8c7b-aee3e0f09b7f
INFO[0000] fc5aa11b-7f1c-4435-8c7b-aee3e0f09b7f: killed

# Get the status of the job
$ ./bin/client status fc5aa11b-7f1c-4435-8c7b-aee3e0f09b7f
Status: STOPPED