127 lines
4.3 KiB
Bash
Executable File
127 lines
4.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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echo -e "
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Before using this tool, ensure that the host has been setup correctly.
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Boot the latest Nixos-minimal install ISO on the host and access the tty.
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Use 'ip a' to get the ip address, then 'sudo su' to change to root. Finally
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Run 'passwd' and set a temporary password (something simple like '1234')
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for the root user.
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"
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read -p "Confirm host had been setup using the above steps...(yes|no): " confirm
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[ "$confirm" != "yes" ] && echo "Exiting" && exit 0
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cd ~
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read -p "Enter hostname: " hostname
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read -p "Enter username: " username
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read -p "Enter ip address: " ip
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KEY_DIR="$HOME/keys/$hostname/"
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mkdir -p $KEY_DIR
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ssh-copy-id -i "$(readlink -n "$HOME/.ssh/gitea.pub" )" "root@$ip"
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echo "Creating ssh keys for new host. Will create in current directory: "$KEY_DIR
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KEY_NAME="ssh_ed25519_key_$hostname"
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KNOWN_HOSTS=$(grep "$ip" ~/.ssh/known_hosts)
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confirm_delete=""
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[ "$KNOWN_HOSTS" != "" ] && echo -e "Host found in: ~/.ssh/known_hosts\n\n$KNOWN_HOSTS\n" && read -p "Delete existing hosts from ~/.ssh/known_hosts? (yes|no) " confirm_delete
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[ "$confirm_delete" = "yes" ] && sed -i "/$ip/d" ~/.ssh/known_hosts
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overwrite=""
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[ -f "$KEY_DIR/$KEY_NAME" ] && read -p "Key exists, would you like to overwrite it? (yes|no) " overwrite
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[ "$overwrite" == "yes" ] && ssh-keygen -t ed25519 -f "$KEY_DIR/$KEY_NAME" -C "$hostname@$ip" -N ""
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echo "Copying ssh key to target host:"
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# Rsync currently not available in Nixos. Use scp instead.
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#rsync -av "ssh_ed25519_key_$hostname"* "root@$ip:/etc/ssh/"
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scp -i "$KEY_DIR/ssh_ed25519_key_$hostname"* "root@$ip:/etc/ssh/"
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[ $? != 0 ] && echo "Error copying keys to target host" && exit 1
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echo "Generating age key from ssh key"
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nix-shell -p ssh-to-age --run "cat $KEY_DIR/$KEY_NAME.pub | ssh-to-age > $KEY_DIR/age_key_$hostname"
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[ $? != 0 ] && echo "Error generating age key" && exit 1
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AGE_KEY=$(cat "$KEY_DIR/age_key_$hostname")
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echo -e "Age key:\n$AGE_KEY\n"
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echo "This needs to be inserted into .sops.yaml file."
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# Install Nixos bootstrap
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cd "$HOME/nixos"
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SHELL=/bin/sh nix run github:nix-community/nixos-anywhere -- --flake .#bootstrap root@"$ip" -i "$KEY_DIR/ssh_ed25519_key_$hostname"
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[ $? != 0 ] && echo "Error installing Nixos" && exit 1
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echo "Deleting host from known_hosts"
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sed -i "/$ip/d" ~/.ssh/known_hosts
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while true;
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do
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read -p "Confirm live CD has been removed... (yes|no)" confirm
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[ "$confirm" = "yes" ] && break
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done
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echo "Waiting for $ip to come back online and port 22 to be open..."
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while ! ping -c 1 $ip &> /dev/null || ! nc -zvw3 $ip 22 &> /dev/null
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do
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echo "$ip is still offline or port 22 is not open. Checking again in 5 seconds..."
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sleep 5
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done
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echo "$ip is now online and port 22 is open!"
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echo "Configuring ssh keys on target host to enable connection to gitea:"
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ssh-copy-id -i "$HOME/.ssh/gitea.pub" "$username@$ip"
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read -r -d '' config << EOM
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Host git.bitlab21.com
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IdentitiesOnly yes
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StrictHostKeyChecking no
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IdentityFile ~/.ssh/gitea
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EOM
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# Append the string to file on target machine
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echo "$config" | ssh "$username@$ip" 'mkdir -p ~/.ssh/ && cat > ~/.ssh/config'
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echo -e "
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Complete!
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Now add the age key to .sops.yaml, like this:
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keys:
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- &hosts:
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- &$hostname $AGE_KEY
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creation_rules:
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- path_regex: secrets.yaml$
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key_groups:
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- age:
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- *$hostname
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Then to update the keys for the secrets.yaml file, run:
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'sops --config .sops.yaml updatekeys secrets.yaml'
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or with nix-shell:
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'nix-shell -p sops --run 'sops --config .sops.yaml updatekeys secrets.yaml''
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then run 'nix flake lock --update-input nix-secrets $HOME/nixos'
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Finally, commit and push these changes to remote so they can be accessed on
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the new host.
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"
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while true;
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do
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read -p "Confirm keys have been added to .sops.yaml using the above steps, and the changes (if any) have been commited and pushed...(yes|no): " confirm
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[ "$confirm" = "yes" ] && break
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done
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echo "Copying gitea private ssh key to host"
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echo "New password is 'nixos'"
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rsync -av "$(readlink -n "$HOME/.ssh/gitea" )" "$username@$ip":~/.ssh/gitea
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ssh "$username@$ip" "nix-shell -p git --run 'git clone git@git.bitlab21.com:sam/nixos.git'"
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ssh "$username@$ip" "nix-shell -p git --run 'git clone git@git.bitlab21.com:sam/nix-secrets.git'"
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echo "Successfully installed Nixos on the target host!"
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echo "Please remote into the new host and run 'sudo nixos-generate-config && cp /etc/nixos/hardware-configuration.nix /home/$username/nixos/hosts/$hostname/'"
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