Add node_taints to aws_inventory script (#10168)

contrib/aws_inventory/kubespray-aws-inventory.py

@@ -39,7 +39,7 @@ def search_tags(self):
       hosts[group] = []
       tag_key = "kubespray-role"
       tag_value = ["*"+group+"*"]
-      region = os.environ['REGION']
+      region = os.environ['AWS_REGION']
 
       ec2 = boto3.resource('ec2', region)
       filters = [{'Name': 'tag:'+tag_key, 'Values': tag_value}, {'Name': 'instance-state-name', 'Values': ['running']}]
@@ -67,6 +67,11 @@ def search_tags(self):
         if node_labels_tag:
           ansible_host['node_labels'] = dict([ label.strip().split('=') for label in node_labels_tag[0]['Value'].split(',') ])
 
+        ##Set when instance actually has node_taints
+        node_taints_tag = list(filter(lambda t: t['Key'] == 'kubespray-node-taints', instance.tags))
+        if node_taints_tag:
+          ansible_host['node_taints'] = list([ taint.strip() for taint in node_taints_tag[0]['Value'].split(',') ])
+
         hosts[group].append(dns_name)
         hosts['_meta']['hostvars'][dns_name] = ansible_host
 

docs/aws.md

@@ -58,11 +58,23 @@ Guide:
 ```ShellSession
 export AWS_ACCESS_KEY_ID="xxxxx"
 export AWS_SECRET_ACCESS_KEY="yyyyy"
-export REGION="us-east-2"
+export AWS_REGION="us-east-2"
 ```
 
 - We will now create our cluster. There will be either one or two small changes. The first is that we will specify `-i inventory/kubespray-aws-inventory.py` as our inventory script. The other is conditional. If your AWS instances are public facing, you can set the `VPC_VISIBILITY` variable to `public` and that will result in public IP and DNS names being passed into the inventory. This causes your cluster.yml command to look like `VPC_VISIBILITY="public" ansible-playbook ... cluster.yml`
 
+**Optional** Using labels and taints
+
+To add labels to your kubernetes node, add the following tag to your instance:
+
+- Key: `kubespray-node-labels`
+- Value: `node-role.kubernetes.io/ingress=`
+
+To add taints to your kubernetes node, add the following tag to your instance:
+
+- Key: `kubespray-node-taints`
+- Value: `node-role.kubernetes.io/ingress=:NoSchedule`
+
 ## Kubespray configuration
 
 Declare the cloud config variables for the `aws` provider as follows. Setting these variables are optional and depend on your use case.