Cmf init

macOS is not supported. cmflib does not install or run on macOS. See open issues #185 and #263 for status. Use a Linux machine or a Linux VM/container instead.

Install cmflib into a Python environment, initialize a storage backend, and verify the setup. If CMF is already initialized, skip to Verify initialization.

Step 1 — Set up a Python environment

CMF requires Python 3.9–3.11 (3.10 recommended).

Detect available tools and ask the user which they prefer:

which uv && echo "uv available" || echo "uv not found"
which conda && echo "conda available" || echo "conda not found"
# venv is always available via Python's standard library

Tool	Priority	Command
uv	Preferred — offer to install if missing	uv venv .cmf --python 3.10 && source .cmf/bin/activate
conda	Next — use if uv unavailable	conda create -n cmf python=3.10 && conda activate cmf
venv	Always available fallback	python3.10 -m venv .cmf && source .cmf/bin/activate

If uv is not installed, offer to install it (manages Python versions automatically):

curl -LsSf https://astral.sh/uv/install.sh | sh   # Linux
# or: pip install uv

If none of the above apply, skip environment creation and install directly with pip install cmflib (requires system Python 3.9–3.11).

See references/init-commands.md for full OS-specific setup and a guided walkthrough.

Step 2 — Install cmflib

pip install cmflib
python -c "from cmflib.cmf import Cmf; print('OK')"

Step 3 — Choose a storage backend

Backend	Use when
local	Single-machine development
minios3	Shared MinIO server (S3-compatible)
amazons3	AWS S3 production storage
sshremote	Artifacts on a remote machine over SSH
osdfremote	OSDF distributed research data federation

Step 4 — Run cmf init

Local

cmf init local \
  --path /path/to/artifact-storage \
  --git-remote-url https://github.com/your-org/your-repo.git

Optional: add --cmf-server-url http://<server>:80 to point at a shared CMF Server.

MinIO / Amazon S3

# MinIO
cmf init minios3 \
  --url http://<minio-host>:9000 \
  --endpoint-url http://<minio-host>:9000 \
  --access-key-id <key> \
  --secret-access-key <secret> \
  --git-remote-url https://github.com/your-org/your-repo.git

# Amazon S3
cmf init amazons3 \
  --url s3://your-bucket/path \
  --access-key-id <key> \
  --secret-access-key <secret> \
  --git-remote-url https://github.com/your-org/your-repo.git

SSH remote

cmf init sshremote \
  --path ssh://user@host:/path/to/storage \
  --git-remote-url https://github.com/your-org/your-repo.git

OSDF remote

Three authentication options — see references/init-commands.md for full parameter table.

Option 1 — pre-generated token (recommended):

cmf init osdfremote \
  --path https://fdp-origin.labs.hpe.com:8443/fdp-hpe/cmf_test \
  --cache https://osdf-director.osg-htc.org/ \
  --access-token ~/.fdp/osdf_token \
  --git-remote-url https://github.com/your-org/your-repo.git

Verify initialization

cmf init show   # should display remote, git URL, and optional server URL

The mlmd file is created automatically on the first pipeline run, not by cmf init itself.

Troubleshooting

• macOS — cmflib is not supported; use Linux or a Linux container
• cmf: command not found — ensure the virtual environment is activated; verify with cmf --version
• Wrong Python version — check with python --version; create a new env targeting 3.10 (uv venv .cmf --python 3.10 or conda create -n cmf python=3.10)
• python3.10 not found (venv) — install via system package manager (sudo apt install python3.10) or use uv/conda which manage Python versions automatically
• Git remote error — CMF requires a configured Git remote; run git remote add origin <url> first
• DVC errors — CMF uses DVC internally; verify with dvc --version; reinstall with pip install cmflib
• MinIO connection refused — verify the MinIO server is up and --url matches the server address and port
• OSDF token expired or invalid — CMF validates the token on init and shows issuer, scope, and expiry; regenerate or switch to key-based auth
• OSDF push fails with permission error — token may lack write scope for --path; contact your OSDF origin administrator

---

Docs: Getting Started · Storage Backends · OSDF Setup · Full Tutorial