Rough notes on Ray

Just a bunch of snippets that we used to deploy a local Ray cluster. We couldn’t get the second node to connect to the cluster even though no error was given.

 bash ./
 source ~/anaconda3/bin/activate
 conda create --name ray.3.7 python=3.7.10;
 conda activate ray.3.7;
 conda install --name ray.3.7 pip;
 pip install ray==1.1.0
 pip install gym pandas torch ray ray[default] ray[rllib] ray[serve] ray[tune];

 sudo apt-get remove docker docker-engine containerd runc;
 sudo apt-get update;
 sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release;
 curl -fsSL | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
 echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
 sudo apt-get update
 sudo apt-get install docker-ce docker-ce-cli
 sudo addgroup --system docker
 sudo adduser $USER docker
 newgrp docker
 sudo systemctl restart docker

 Uninstall Docker Engine
 Uninstall the Docker Engine, CLI, and Containerd packages:
 sudo apt-get purge docker-ce docker-ce-cli
 Images, containers, volumes, or customized configuration files on your host are not automatically removed. To delete all images, containers, and volumes:
 sudo rm -rf /var/lib/docker
  sudo rm -rf /var/lib/containerd
 You must delete any edited configuration files manually.

 2021-06-09 03:56:34,453    WARNING -- WARNING: The object store is using /tmp instead of /dev/shm because /dev/shm has only 7963275264 bytes available. This will harm performance! You may be able to free up space by deleting files in /dev/shm. If you are inside a Docker container, you can increase /dev/shm size by passing '--shm-size=10.24gb' to 'docker run' (or add it to the run_options list in a Ray cluster config). Make sure to set this to more than 30% of available RAM.

 ray up office.yaml
 ray up -vvvvvv office.yaml
 ray exec office.yaml 'ray status'

The yaml file that we used was the following

# A unique identifier for the head node and workers of this cluster.
cluster_name: default

# This executes all commands on all nodes in the docker container,
# and opens all the necessary ports to support the Ray cluster.
# Empty string means disabled. Assumes Docker is installed.
    image: "rayproject/ray-ml:1.1.0" # You can change this to latest-cpu if you don't need GPU support and want a faster startup
    # image: rayproject/ray:latest-gpu   # use this one if you don't need ML dependencies, it's faster to pull
    container_name: "ray_container"
    # If true, pulls latest version of image. Otherwise, `docker run` will only pull the image
    # if no cached version is present.
    pull_before_run: True
    run_options: ["--shm-size=10.24gb"]  # Extra options to pass into "docker run"

    type: local
    # You may need to supply a public ip for the head node if you need
    # to run `ray up` from outside of the Ray cluster's network
    # (e.g. the cluster is in an AWS VPC and you're starting ray from your laptop)
    # This is useful when debugging the local node provider with cloud VMs.
    # external_head_ip: YOUR_HEAD_PUBLIC_IP
    worker_ips: []
    ## worker_ips: [WORKER_NODE_1_HOSTNAME, WORKER_NODE_2_HOSTNAME, ... ]
    # Optional when running automatic cluster management on prem. If you use a coordinator server,
    # then you can launch multiple autoscaling clusters on the same set of machines, and the coordinator
    # will assign individual nodes to clusters as needed.
    #    coordinator_address: "<host>:<port>"
    # cache_stopped_nodes: False

# How Ray will authenticate with newly launched nodes.
    ssh_user: tux
    #ssh_user: YOUR_USERNAME
    # Optional if an ssh private key is necessary to ssh to the cluster.
    ssh_private_key: ~/.ssh/id_rsa

# The minimum number of workers nodes to launch in addition to the head
# node. This number should be >= 0.
# Typically, min_workers == max_workers == len(worker_ips).
min_workers: 20

# The maximum number of workers nodes to launch in addition to the head node.
# This takes precedence over min_workers.
# Typically, min_workers == max_workers == len(worker_ips).
max_workers: 20
# The default behavior for manually managed clusters is
# min_workers == max_workers == len(worker_ips),
# meaning that Ray is started on all available nodes of the cluster.
# For automatically managed clusters, max_workers is required and min_workers defaults to 0.

initial_workers: 20

# The autoscaler will scale up the cluster faster with higher upscaling speed.
# E.g., if the task requires adding more nodes then autoscaler will gradually
# scale up the cluster in chunks of upscaling_speed*currently_running_nodes.
# This number should be > 0.
upscaling_speed: 1.0

idle_timeout_minutes: 5

# Files or directories to copy to the head and worker nodes. The format is a
# dictionary from REMOTE_PATH: LOCAL_PATH, e.g.
file_mounts: {
#    "/path1/on/remote/machine": "/path1/on/local/machine",
#    "/path2/on/remote/machine": "/path2/on/local/machine",

# Files or directories to copy from the head node to the worker nodes. The format is a
# list of paths. The same path on the head node will be copied to the worker node.
# This behavior is a subset of the file_mounts behavior. In the vast majority of cases
# you should just use file_mounts. Only use this if you know what you're doing!
cluster_synced_files: []

# Whether changes to directories in file_mounts or cluster_synced_files in the head node
# should sync to the worker node continuously
file_mounts_sync_continuously: False

# Patterns for files to exclude when running rsync up or rsync down
    - "**/.git"
    - "**/.git/**"

# Pattern files to use for filtering out files when running rsync up or rsync down. The file is searched for
# in the source directory and recursively through all subdirectories. For example, if .gitignore is provided
# as a value, the behavior will match git's behavior for finding and using .gitignore files.
    - ".gitignore"

# List of commands that will be run before `setup_commands`. If docker is
# enabled, these commands will run outside the container and before docker
# is setup.
initialization_commands: []

# List of shell commands to run to set up each nodes.
setup_commands: []
    # Note: if you're developing Ray, you probably want to create a Docker image that
    # has your Ray repo pre-cloned. Then, you can replace the pip installs
    # below with a git checkout <your_sha> (and possibly a recompile).
    # To run the nightly version of ray (as opposed to the latest), either use a rayproject docker image
    # that has the "nightly" (e.g. "rayproject/ray-ml:nightly-gpu") or uncomment the following line:
    # - pip install -U "ray[default] @"

# Custom commands that will be run on the head node after common setup.
head_setup_commands: []

# Custom commands that will be run on worker nodes after common setup.
worker_setup_commands: []

# Command to start ray on the head node. You don't need to change this.
    - ray stop
    - ulimit -c unlimited && ray start --head --port=6379 --autoscaling-config=~/ray_bootstrap_config.yaml

# Command to start ray on worker nodes. You don't need to change this.
    - ray stop
    - ray start --address=$RAY_HEAD_IP:6379

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