Support creating multiple ssh connections

[tcompa]

Checklist before merging

• I merged Fix spurious threads in tests and Slurm executor #1793
• I added an appropriate entry to CHANGELOG.md
• I added logging to new code - if appropriate.
• I merged main into the current branch.

[github-actions]

Benchmark comparison

GET /api/alive/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	0.9	0.9	1.00	0.0	0.0
power	0.8	0.8	1.00	0.0	0.0
dataset	0.8	0.8	1.00	0.0	0.0
project	0.8	0.8	1.00	0.0	0.0
job	0.8	0.8	1.00	0.0	0.0

GET /api/v2/dataset/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	8.9	9.2	0.97	0.6	0.6
power	402.4	412.1	0.98	389.0	389.0
dataset	156.1	158.5	0.98	145.6	145.6
project	43.1	47.4	0.91	50.9	50.9
job	28.1	26.8	1.05	35.3	35.3

GET /api/v2/job/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	5.7	6.2	0.92	2.2	2.2
power	140.3	141.6	0.99	652.0	652.0
dataset	136.6	144.1	0.95	904.8	904.8
project	48.0	49.0	0.98	283.7	283.7
job	37.7	38.9	0.97	224.8	224.8

GET /api/v2/project/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	6.3	6.7	0.94	0.1	0.1
power	6.2	6.4	0.97	0.1	0.1
dataset	6.1	6.3	0.97	0.1	0.1
project	8.0	8.5	0.94	2.3	2.3
job	6.1	6.5	0.94	0.1	0.1

GET /api/v2/workflow/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	10.8	11.4	0.95	0.8	0.8
power	26.1	24.5	1.07	27.2	27.2
dataset	18.9	18.3	1.03	15.8	15.8
project	21.9	21.3	1.03	19.9	19.9
job	9.9	10.0	0.99	0.8	0.8

POST /api/v2/project/3/dataset/418/images/query/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
dataset	149.1	150.8	0.99	275.1	275.1

GET /auth/current-user/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
vanilla	4.2	4.6	0.91	0.2	0.2
power	4.2	4.3	0.98	0.2	0.2
dataset	4.2	4.2	1.00	0.2	0.2
project	4.0	4.3	0.93	0.2	0.2
job	4.0	4.1	0.98	0.2	0.2

POST /auth/token/login/

User	Time current (ms)	Time main (ms)	Ratio current/main	Size current (Kb)	Size main (Kb)
dataset	263.5	263.7	1.00	0.2	0.2

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
fractal_server
main.py
fractal_server/app/routes/api/v2
submit.py
task_collection.py
fractal_server/app/runner/executors/slurm/ssh
executor.py
fractal_server/app/runner/executors/slurm/sudo
executor.py
fractal_server/ssh
_fabric.py
Project Total

This report was generated by python-coverage-comment-action