Installing certbot on an EC2 using AWS Systems Manager
- Certbot with Apache
- Letsencrypt Certbot Common Tasks
- Installing certbot on an EC2 using AWS Systems Manager
- Troubleshooting letsencrypt and certbot
- Invalid Document Content Error in running an AWS SSM document
Registering the certbot client and requesting a certificate
- sudo yum -y install yum-utils
- sudo yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
- sudo yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional
- sudo yum -y install certbot
- sudo certbot register --server {{ CertServerUrl }} -m {{ contactEmail }} --no-eff-email
- sudo certbot certonly --server {{ CertServerUrl }} --cert-name {{ certName }} -d {{ certDomains }} --webroot-path {{ webrootPath }} > /home/certbotout.txt
The terraform file (ssm-certbot.tf)
# input variables
variable "instance_ids" {
type = list
default = [""]
}
variable "cert_common_name" {
type = string
default = "avTestCert"
}
variable "cert_domain_names" {
type = list(string)
default = ["example.com, www.example.com, mail.example.com"]
}
variable "web_root_path" {
type = string
default = "/var/www"
}
#Permissions for SSM to run
resource "aws_iam_role_policy_attachment" "ec2_ssm_policy" {
role = aws_iam_role.aws_ec2_role.id
policy_arn = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore"
}
# SSM document
resource "aws_ssm_document" "my_ssm_doc" {
name = "test_document"
document_type = "Command"
document_format = "YAML"
content = file("./ssm-content.yaml")
}
# SSM association
resource "aws_ssm_association" "assoc" {
name = "${aws_ssm_document.my_ssm_doc.name}"
targets {
key = "InstanceIds"
values = ["${aws_instance.anujtf000000.id}"]
}
parameters = {
certDomains = "${aws_instance.anujtf00000.private_dns}"
certName = "mycertName"
contactEmail = "blah@blah.com"
ServerProvisioningUrl = "https://acme-staging-v02.api.letsencrypt.org/directory"
}
}
The YAML file (ssm-content.yaml) – content for the Systems Manager doc association
NOTE: Beware any whitespaces in the yaml. You will see a mysterious Invalid Document Content error from the terraform SSM document resource. The error is simply telling you that the content (this yaml file) is inavalid – usually because of an extra whitespace.
---
schemaVersion: '2.2'
description: Certbot Install on EC2
parameters:
certDomains:
type: String
description: "Comma-Separated list of domains for which a certificate will be installed. e.g. example.com, www.example.com"
certName:
type: String
description: "The CN (common name) of this certificate. e.g. example.com"
contactEmail:
type: String
description: "Email address for certificate notifications."
webrootPath:
type: String
description: "web root path of webserver. e.g. /var/www"
ServerProvisioningUrl:
type: String
description: "The ACME server endpoint URL."
mainSteps:
- action: aws:runShellScript
name: configureServer
inputs:
runCommand:
- sudo yum -y install yum-utils
- sudo yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
- sudo yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional
- sudo yum -y install certbot
- sudo certbot register --server {{ ServerProvisioningUrl }} -m {{ contactEmail }} --no-eff-email
- sudo certbot certonly --server {{ ServerProvisioningUrl }} --cert-name {{ certName }} -d {{ certDomains }} --webroot-path {{ webrootPath }}
Creating cert in –standalone mode
sudo yum -y install yum-utils
– sudo yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
– sudo yum-config-manager –enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional
– sudo yum -y install certbot
– sudo certbot register –server {{ acmeServerUrl }} -m {{ contactEmail }} –no-eff-email
– sudo certbot certonly –server {{ acmeServerUrl }} –cert-name {{ certName }} -d {{ certDomains }} –webroot-path {{ webrootPath }} > /home/certbotrun.txt
Anuj holds professional certifications in Google Cloud, AWS as well as certifications in Docker and App Performance Tools such as New Relic. He specializes in Cloud Security, Data Encryption and Container Technologies.
Anuj Varma – who has written 1260 posts on Anuj Varma, Hands-On Technology Architect, Clean Air Activist.
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