106 lines
3.9 KiB
Bash
Executable File
106 lines
3.9 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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[ "$confirm" != "yes" ] && echo "Exiting" && exit 0
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hostname="sparky"
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ip="192.168.122.193"
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config="bootstrap"
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# Delete key in known hosts if exists
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sed -i "/$ip/d" ~/.ssh/known_hosts
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# Authorise source public key
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echo "Copying pubkey to target host"
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ssh-copy-id -i "$(readlink -f "$HOME/.ssh/id_ed25519.pub")" "root@$ip"
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# Create temp directory for ssh and luks keys to be copied to host:
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temp_ssh=$(mktemp -d)
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touch /tmp/luks_secret.key
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# Function to cleanup temporary directory on exit
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cleanup() {
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rm -rf "$temp_ssh" /tmp/luks_secret.key
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}
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trap cleanup EXIT
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# Create the directory where sshd expects to find the host keys
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install -d -m755 "$temp_ssh/persist/etc/ssh"
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# Create ssh keys if not exists
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echo "Creating '$hostname' ssh keys"
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ssh-keygen -t ed25519 -f "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key" -C root@"$hostname" -N ""
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chmod 600 "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key"
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chmod 644 "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key.pub"
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# Generate age key from target host and user public ssh key
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echo "Generating age key from target host and user ssh key"
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HOST_AGE_KEY=$(nix-shell -p ssh-to-age --run "cat $temp_ssh/persist/etc/ssh/ssh_host_ed25519_key.pub | ssh-to-age")
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echo -e "Host age key:\n$HOST_AGE_KEY\n"
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# Update .sops.yaml with new age key:
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SOPS_FILE="../nix-secrets/.sops.yaml"
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sed -i "{
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# Remove any * and & entries for this host
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/[*&]$hostname/ d;
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# Inject a new age: entry
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# n matches the first line following age: and p prints it, then we transform it while reusing the spacing
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/age:/{n; p; s/\(.*- \*\).*/\1$hostname/};
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# Inject a new hosts: entry
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/&hosts:/{n; p; s/\(.*- &\).*/\1$hostname $HOST_AGE_KEY/}
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}" $SOPS_FILE
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just update-sops-secrets && just update-flake-secrets && just update-flake
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# Extract luks key from secrets
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luks_secret=$(nix-shell -p sops --run "SOPS_AGE_KEY_FILE=~/.config/sops/age/keys.txt sops -d --extract '[""\"luks_passphrase""\"][""\"sparky""\"]' ../nix-secrets/secrets.yaml")
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echo "$luks_secret" > /tmp/luks_secret.key
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# Install Nixos to target
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cd "$HOME/nixos"
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git add . && git commit -m "auto: bootstrapping $hostname" && git push
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SHELL=/bin/sh nix run github:nix-community/nixos-anywhere/242444d228636b1f0e89d3681f04a75254c29f66 -- --extra-files "$temp_ssh" --disk-encryption-keys /tmp/luks_secret.key /tmp/luks_secret.key --flake .#"$config" root@"$ip" -i "$HOME/.ssh/id_ed25519"
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[ $? != 0 ] && echo "Error installing Nixos" && exit 1
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## Delete keys from local known_hosts
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echo "Deleting host from known_hosts"
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sed -i "/$ip/d" ~/.ssh/known_hosts
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# Check host OS has booted (and not booted back into live cd)
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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 "$ip is now online and port 22 is open!"
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# Authorise source public key
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echo "Copying pubkey to target host"
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ssh-copy-id -i "$(readlink -f "$HOME/.ssh/id_ed25519.pub")" "root@$ip"
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# Copy deploy_key to target for personal repo authorisation
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scp -i "$(readlink -f "$HOME/.ssh/id_ed25519")" "$(readlink -f "$HOME/.ssh/deploy_key-ssh-ed25519")" "root@$ip:/persist/etc/ssh/deploy_key-ssh-ed25519"
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ssh -i "$(readlink -f "$HOME/.ssh/id_ed25519")" "root@$ip" "nix-shell -p git --run 'git clone git@git.bitlab21.com:sam/nixos.git /persist/etc/nixos/'"
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echo -e "###\nSuccessfully installed Nixos on the target host!\n###"
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exit 0
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