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Refactor user-data handling in node-group module #77

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Refactor user-data handling in node-group module #77

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91 changes: 55 additions & 36 deletions modules/node-group/main.tf
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Original file line number Diff line number Diff line change
@@ -1,6 +1,60 @@
locals {
anti_affinity_capacity = 4
anti_affinity_group_count = ceil(var.node_count / local.anti_affinity_capacity)

user_data = [
for hostname in random_id.node[*].hex :
{
"ignition" : {
"version" : "3.2.0",
"config" : {
"merge" : [{
"source" : "https://${var.api_int}:22623/config/${var.ignition_config}"
}]
},
"security" : {
"tls" : {
"certificateAuthorities" : [{
"source" : "data:text/plain;charset=utf-8;base64,${base64encode(var.ignition_ca)}"
}]
}
}
},
"systemd" : {
"units" : [
{
"name" : "cloudscale-hostkeys.service",
"enabled" : true,
"contents" : <<-EOC
[Unit]
Description=Print SSH Public Keys to tty
After=sshd-keygen.target

[Install]
WantedBy=multi-user.target

[Service]
Type=oneshot
StandardOutput=tty
TTYPath=/dev/ttyS0
ExecStart=/bin/sh -c "echo '-----BEGIN SSH HOST KEY KEYS-----'; cat /etc/ssh/ssh_host_*key.pub; echo '-----END SSH HOST KEY KEYS-----'"
EOC
}
]
},
"storage": {
"files": [
{
"path": "/etc/hostname",
"mode": 420,
"contents": {
"source": "data:,${hostname}"
}
}
]
}
}
]
}

resource "random_id" "node" {
Expand Down Expand Up @@ -30,42 +84,7 @@ resource "cloudscale_server" "node" {
subnet_uuid = var.subnet_uuid
}
}
user_data = <<-EOF
{
"ignition": {
"version": "3.1.0",
"config": {
"merge": [{
"source": "https://${var.api_int}:22623/config/${var.ignition_config}"
}]
},
"security": {
"tls": {
"certificateAuthorities": [{
"source": "data:text/plain;charset=utf-8;base64,${base64encode(var.ignition_ca)}"
}]
}
}
},
"systemd": {
"units": [{
"name": "cloudscale-hostkeys.service",
"enabled": true,
"contents": "[Unit]\nDescription=Print SSH Public Keys to tty\nAfter=sshd-keygen.target\n\n[Install]\nWantedBy=multi-user.target\n\n[Service]\nType=oneshot\nStandardOutput=tty\nTTYPath=/dev/ttyS0\nExecStart=/bin/sh -c \"echo '-----BEGIN SSH HOST KEY KEYS-----'; cat /etc/ssh/ssh_host_*key.pub; echo '-----END SSH HOST KEY KEYS-----'\""
}]
},
"storage": {
"files": [{
"filesystem": "root",
"path": "/etc/hostname",
"mode": 420,
"contents": {
"source": "data:,${random_id.node[count.index].hex}"
}
}]
}
}
EOF
user_data = jsonencode(local.user_data[count.index])

lifecycle {
ignore_changes = [
Expand Down