☁️ Add support for Linode deployment

prepare-vms/lib/commands.sh

@@ -69,11 +69,14 @@ _cmd_deploy() {
     echo deploying > tags/$TAG/status
     sep "Deploying tag $TAG"
 
-    # Wait for cloudinit to be done
+    # If this VM image is using cloud-init,
+    # wait for cloud-init to be done
     pssh "
-    while [ ! -f /var/lib/cloud/instance/boot-finished ]; do
-        sleep 1
-    done"
+    if [ -d /var/lib/cloud ]; then
+        while [ ! -f /var/lib/cloud/instance/boot-finished ]; do
+            sleep 1
+        done
+    fi"
 
     # Special case for scaleway since it doesn't come with sudo
     if [ "$INFRACLASS" = "scaleway" ]; then
@@ -102,6 +105,12 @@ _cmd_deploy() {
     sudo apt-get update &&
     sudo apt-get install -y python-yaml"
 
+    # If there is no "python" binary, symlink to python3
+    #pssh "
+    #if ! which python; then
+    #    ln -s $(which python3) /usr/local/bin/python
+    #fi"
+
     # Copy postprep.py to the remote machines, and execute it, feeding it the list of IP addresses
     pssh -I tee /tmp/postprep.py <lib/postprep.py
     pssh --timeout 900 --send-input "python /tmp/postprep.py >>/tmp/pp.out 2>>/tmp/pp.err" <tags/$TAG/ips.txt
@@ -208,7 +217,14 @@ _cmd_kube() {
     echo 'alias k=kubectl' | sudo tee /etc/bash_completion.d/k &&
     echo 'complete -F __start_kubectl k' | sudo tee -a /etc/bash_completion.d/k"
 
-    # Initialize kube master
+    # Disable swap
+    # (note that this won't survive across node reboots!)
+    if [ "$INFRACLASS" = "linode" ]; then
+        pssh "
+        sudo swapoff -a"
+    fi
+
+    # Initialize kube control plane
     pssh --timeout 200 "
     if i_am_first_node && [ ! -f /etc/kubernetes/admin.conf ]; then
         kubeadm token generate > /tmp/token &&

prepare-vms/lib/infra/linode.sh

@@ -0,0 +1,58 @@
+if ! command -v linode-cli >/dev/null; then
+  warn "Linode CLI (linode-cli) not found."
+fi
+if ! [ -f ~/.config/linode-cli ]; then
+  warn "~/.config/linode-cli not found."
+fi
+
+# To view available regions: "linode-cli regions list"
+LINODE_REGION=${LINODE_REGION-us-west}
+
+# To view available types: "linode-cli linodes types"
+LINODE_TYPE=${LINODE_TYPE-g6-standard-2}
+
+infra_list() {
+    linode-cli linodes list --json |
+        jq -r '.[] | [.id, .label, .status, .type] | @tsv'
+}
+
+infra_start() {
+    COUNT=$1
+
+    for I in $(seq 1 $COUNT); do
+        NAME=$(printf "%s-%03d" $TAG $I)
+        sep "Starting instance $I/$COUNT"
+        info "          Zone: $LINODE_REGION"
+        info "          Name: $NAME"
+        info " Instance type: $LINODE_TYPE"
+        ROOT_PASS="$(base64 /dev/urandom | cut -c1-20 | head -n 1)"
+        linode-cli linodes create \
+            --type=${LINODE_TYPE} --region=${LINODE_REGION} \
+            --image=linode/ubuntu18.04 \
+            --authorized_keys="${LINODE_SSHKEY}" \
+            --root_pass="${ROOT_PASS}" \
+            --tags=${TAG} --label=${NAME}
+    done
+    sep
+
+    linode_get_ips_by_tag $TAG > tags/$TAG/ips.txt
+}
+
+infra_stop() {
+    info "Counting instances..."
+    linode_get_ids_by_tag $TAG | wc -l
+    info "Deleting instances..."
+    linode_get_ids_by_tag $TAG | 
+        xargs -n1 -P10 \
+        linode-cli linodes delete
+}
+
+linode_get_ids_by_tag() {
+    TAG=$1
+    linode-cli linodes list --tags $TAG --json | jq -r ".[].id"
+}
+
+linode_get_ips_by_tag() {
+    TAG=$1
+    linode-cli linodes list --tags $TAG --json | jq -r ".[].ipv4[0]"
+}

prepare-vms/lib/pssh.sh

@@ -18,11 +18,11 @@ pssh() {
     echo "[parallel-ssh] $@"
     export PSSH=$(which pssh || which parallel-ssh)
 
-    if [ "$INFRACLASS" = hetzner ]; then
-        LOGIN=root
-    else
-        LOGIN=ubuntu
-    fi
+    case "$INFRACLASS" in
+        hetzner) LOGIN=root ;;
+        linode)  LOGIN=root ;;
+        *)       LOGIN=ubuntu ;;
+    esac
 
     $PSSH -h $HOSTFILE -l $LOGIN \
         --par 100 \