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feat: Update k3s VM startup script with improved disk formatting and user configuration

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jon brookes 2025-09-29 19:02:38 +01:00
parent 3e1146ee9d
commit 4a8ae2d1ff
1 changed files with 57 additions and 12 deletions
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69
gcloud/tf/scripts/k3s-vm-startup.sh
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@ -1,12 +1,32 @@
#!/bin/bash #!/bin/bash
# Format the disk if not already formatted # Format the k3s disk if not already formatted
# This command creates an ext4 filesystem on the specified
# disk with no reserved space for root, forces the operation,
# fully initializes inode tables and the journal, and enables
# discard/TRIM for better performance on SSDs or
# thin-provisioned storage.
if ! lsblk | grep -q "/mnt/disks/k3s"; then if ! lsblk | grep -q "/mnt/disks/k3s"; then
mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/disk/by-id/google-k3s-disk mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/disk/by-id/google-k3s-disk
mkdir -p /mnt/disks/k3s mkdir -p /var/lib/rancher/k3s
mount -o discard,defaults /dev/disk/by-id/google-k3s-disk /mnt/disks/k3s mount -o discard,defaults /dev/disk/by-id/google-k3s-disk /var/lib/rancher/k3s
chmod a+w /mnt/disks/k3s chmod a+w /var/lib/rancher/k3s
fi fi
# A disk named k3s-disk in your Terraform configuration will
# appear as /dev/disk/by-id/google-k3s-disk.
# Format the app-data-disk if not already formatted
if ! lsblk | grep -q "/mnt/disks/app-data"; then
mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/disk/by-id/google-app-data-disk
mkdir -p /mnt/disks/app-data
mount -o discard,defaults /dev/disk/by-id/google-app-data-disk /mnt/disks/app-data
chmod a+w /mnt/disks/app-data
fi
# Similarly, a disk named app-data-disk will appear as /dev/
# disk/by-id/google-app-data-disk.
# ensure only run once # ensure only run once
if [[ -f /etc/startup_was_launched ]]; then exit 0; fi if [[ -f /etc/startup_was_launched ]]; then exit 0; fi
@ -21,13 +41,38 @@ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scrip
chmod 700 get_helm.sh chmod 700 get_helm.sh
/bin/bash get_helm.sh /bin/bash get_helm.sh
# bashrc config # user bashrc config
rc=/root/.bashrc rc=/home/user/.bashrc
echo "alias l='ls -lah'" >> $rc {
echo "alias ll='ls -lh'" >> $rc echo "export KUBECONFIG=~/.kube/config"
echo "alias k=kubectl" >> $rc echo "alias l='ls -lah'"
echo "export dry='--dry-run=client'" >> $rc echo "alias ll='ls -lh'"
echo "export o='-oyaml'" >> $rc echo "alias k=kubectl"
echo "export dry='--dry-run=client'"
echo "export o='-oyaml'"
echo "alias kcd='kubectl config use-context'"
echo "source <(kubectl completion bash)"
echo "complete -F __start_kubectl k"
echo "alias k='kubectl'"
} >> $rc
# Install k3s and configure it to use the persistent disk for data storage # Install k3s and configure it to use the persistent disk for data storage
curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="--data-dir /mnt/disks/k3s" sh - # curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="--data-dir /mnt/disks/k3s" sh -
k3s_version="v1.32.8+k3s1"
curl -sfL https://get.k3s.io \
| \
INSTALL_K3S_VERSION="$k3s_version" sh -s - server \
--cluster-init \
--disable traefik \
--disable servicelb
mkdir -p /home/user/.kube
chown user:user /home/user/.kube
chmod 700 /home/user/.kube
# Copy the kubeconfig file to the user's home directory
# for easier access
cp /etc/rancher/k3s/k3s.yaml /home/user/.kube/config
chown user:user /home/user/.kube/config