Integrate etcd-setup into etcd-member (#114)

etcd.tf

@@ -55,15 +55,6 @@ data "ignition_file" "etcd-prom-machine-role" {
   }
 }
 
-data "template_file" "etcd-setup" {
-  template = file("${path.module}/resources/etcd-setup.service")
-}
-
-data "ignition_systemd_unit" "etcd-setup" {
-  name    = "etcd-setup.service"
-  content = data.template_file.etcd-setup.rendered
-}
-
 data "template_file" "etcdctl-wrapper" {
   count    = length(var.etcd_addresses)
   template = file("${path.module}/resources/etcdctl-wrapper")
@@ -121,8 +112,7 @@ data "template_file" "etcd-member" {
   template = file("${path.module}/resources/etcd-member.service")
 
   vars = {
-    etcd_image_url       = var.etcd_image_url
-    etcd_image_tag       = var.etcd_image_tag
+    etcd_version         = var.etcd_image_tag
     index                = count.index
     etcd_initial_cluster = join(",", formatlist("member%s=https://%s:2380", null_resource.etcd_member.*.triggers.index, var.etcd_addresses))
     private_ipv4         = var.etcd_addresses[count.index]
@@ -164,7 +154,6 @@ data "ignition_config" "etcd" {
       data.ignition_systemd_unit.locksmithd_etcd.id,
       data.ignition_systemd_unit.docker-opts-dropin.id,
       data.ignition_systemd_unit.node-exporter.id,
-      data.ignition_systemd_unit.etcd-setup.id,
       element(data.ignition_systemd_unit.etcd-member.*.id, count.index),
       element(data.ignition_systemd_unit.etcd-disk-mounter.*.id, count.index)
     ],

resources/etcd-member.service

@@ -4,8 +4,8 @@
 Description=etcd (System Application Container)
 Documentation=https://github.com/coreos/etcd
 Wants=network-online.target network.target
-Requires=disk-mounter.service etcd-setup.service cert-fetch.service
-After=network-online.target disk-mounter.service etcd-setup.service cert-fetch.service
+Requires=disk-mounter.service cert-fetch.service
+After=network-online.target disk-mounter.service cert-fetch.service
 Conflicts=etcd.service
 Conflicts=etcd2.service
 
@@ -33,6 +33,12 @@ Environment="ETCD_PEER_TRUSTED_CA_FILE=/etc/etcd/ssl/ca.pem"
 Environment="ETCD_PEER_CERT_FILE=/etc/etcd/ssl/node.pem"
 Environment="ETCD_PEER_KEY_FILE=/etc/etcd/ssl/node-key.pem"
 
+ExecStartPre=-/bin/sh -c "\
+  test ! -f /opt/bin/etcd && \
+  test -f /opt/bin/etcd.tar.gz && \
+  tar --strip-components=1 -C /opt/bin \
+    -xzf /opt/bin/etcd.tar.gz etcd-${etcd_version}-linux-amd64/etcd"
+
 ExecStart=/opt/bin/etcd
 
 [Install]