Add support for RHEL7/Systemd in Terraform example

terraform/README.md

@@ -2,4 +2,4 @@
 
 This folder contains modules for Terraform that can setup Consul for
 various systems. The infrastructure provider that is used is designated
-by the folder above. See the `variables.tf` file in each for more documentation.
+by the folder above. See the `variables.tf` file in each for more documentation. 

terraform/aws/consul.tf

@@ -16,14 +16,10 @@ resource "aws_instance" "server" {
     }
 
     provisioner "file" {
-        source = "${path.module}/scripts/${var.platform}/upstart.conf"
-        destination = "/tmp/upstart.conf"
+        source = "${path.module}/scripts/${lookup(var.service_conf, var.platform)}"
+        destination = "/tmp/${lookup(var.service_conf_dest, var.platform)}"
     }
 
-    provisioner "file" {
-        source = "${path.module}/scripts/${var.platform}/upstart-join.conf"
-        destination = "/tmp/upstart-join.conf"
-    }
 
     provisioner "remote-exec" {
         inline = [
@@ -34,15 +30,15 @@ resource "aws_instance" "server" {
 
     provisioner "remote-exec" {
         scripts = [
-            "${path.module}/scripts/${var.platform}/install.sh",
-            "${path.module}/scripts/${var.platform}/server.sh",
-            "${path.module}/scripts/${var.platform}/service.sh",
+            "${path.module}/scripts/install.sh",
+            "${path.module}/scripts/service.sh",
+            "${path.module}/scripts/ip_tables.sh",
         ]
     }
 }
 
 resource "aws_security_group" "consul" {
-    name = "consul"
+    name = "consul_${var.platform}"
     description = "Consul internal traffic + maintenance."
 
     // These are for internal traffic

terraform/aws/scripts/centos6/upstart.conf → terraform/aws/scripts/debian_upstart.conf

@@ -1,6 +1,6 @@
 description "Consul agent"
 
-start on runlevel [2345]
+start on started networking
 stop on runlevel [!2345]
 
 respawn
@@ -24,3 +24,4 @@ script
     ${CONSUL_FLAGS} \
     >>/var/log/consul.log 2>&1
 end script
+

terraform/aws/scripts/install.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+set -e
+
+echo "Installing dependencies..."
+if [ -x "$(command -v apt-get)" ]; then
+  sudo apt-get update -y
+  sudo apt-get install -y unzip
+else
+  sudo yum update -y
+  sudo yum install -y unzip wget
+fi
+
+
+echo "Fetching Consul..."
+CONSUL=0.6.3
+cd /tmp
+wget https://releases.hashicorp.com/consul/${CONSUL}/consul_${CONSUL}_linux_amd64.zip -O consul.zip
+
+echo "Installing Consul..."
+unzip consul.zip >/dev/null
+chmod +x consul
+sudo mv consul /usr/local/bin/consul
+sudo mkdir -p /opt/consul/data
+
+# Read from the file we created
+SERVER_COUNT=$(cat /tmp/consul-server-count | tr -d '\n')
+CONSUL_JOIN=$(cat /tmp/consul-server-addr | tr -d '\n')
+
+# Write the flags to a temporary file
+cat >/tmp/consul_flags << EOF
+CONSUL_FLAGS="-server -bootstrap-expect=${SERVER_COUNT} -join=${CONSUL_JOIN} -data-dir=/opt/consul/data"
+EOF
+
+if [ -f /tmp/upstart.conf ];
+then
+  echo "Installing Upstart service..."
+  sudo mkdir -p /etc/consul.d
+  sudo mkdir -p /etc/service
+  sudo chown root:root /tmp/upstart.conf 
+  sudo mv /tmp/upstart.conf /etc/init/consul.conf
+  sudo chmod 0644 /etc/init/consul.conf
+  sudo mv /tmp/consul_flags /etc/service/consul
+  sudo chmod 0644 /etc/service/consul
+else
+  echo "Installing Systemd service..."
+  sudo mkdir -p /etc/systemd/system/consul.d
+  sudo chown root:root /tmp/consul.service 
+  sudo mv /tmp/consul.service /etc/systemd/system/consul.service
+  sudo chmod 0644 /etc/systemd/system/consul.service
+  sudo mv /tmp/consul_flags /etc/sysconfig/consul
+  sudo chown root:root /etc/sysconfig/consul
+  sudo chmod 0644 /etc/sysconfig/consul
+fi

terraform/aws/scripts/ip_tables.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+sudo iptables -I INPUT -s 0/0 -p tcp --dport 8300 -j ACCEPT
+sudo iptables -I INPUT -s 0/0 -p tcp --dport 8301 -j ACCEPT
+sudo iptables -I INPUT -s 0/0 -p tcp --dport 8302 -j ACCEPT
+
+if [ -d /etc/sysconfig ]; then
+  sudo iptables-save | sudo tee /etc/sysconfig/iptables
+else
+  sudo iptables-save | sudo tee /etc/iptables.rules
+fi

terraform/aws/scripts/rhel_consul.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=consul agent
+Requires=network-online.target
+After=network-online.target
+
+[Service]
+EnvironmentFile=-/etc/sysconfig/consul
+Restart=on-failure
+ExecStart=/usr/local/bin/consul agent $CONSUL_FLAGS -config-dir=/etc/systemd/system/consul.d
+ExecReload=/bin/kill -HUP $MAINPID
+KillSignal=SIGINT
+
+[Install]
+WantedBy=multi-user.target

terraform/aws/scripts/rhel6/upstart.conf → terraform/aws/scripts/rhel_upstart.conf

@@ -1,6 +1,6 @@
 description "Consul agent"
 
-start on runlevel [2345]
+start on started network
 stop on runlevel [!2345]
 
 respawn

terraform/aws/scripts/service.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+echo "Starting Consul..."
+if [ -x "$(command -v systemctl)" ]; then
+  echo "using systemctl"
+  sudo systemctl enable consul.service
+  sudo systemctl start consul
+else 
+  echo "using upstart"
+  sudo start consul
+fi