7.14. VPC Management#
There is a limit on the number of VPCs that are allowed per account - limit is 5.
What is the difference between a private and a public vpc? (what setting is used in the yaml file, and why is one preferred over the other?)
Note, there is a default VPC, that is used to create EC2 instances, that should not be deleted.
Q1. is there a separate default VPC for each region?
Q2. Each time you run a configure cluster command, does the ParallelCluster create a new VPC?
Q3. Why don’t the VPC and subnet IDs get deleted when the ParallelClusters are deleted?
7.14.1. Deleting VPCs#
If pcluster configure created a new VPC, you can delete that VPC by deleting the AWS CloudFormation stack it created. The name will start with “parallelclusternetworking-” and contain the creation time in a “YYYYMMDDHHMMSS” format. You can list the stacks using the list-stacks command. The following instructions are available here:
Instructions for Cleaning Up VPCs
$ aws --region us-east-2 cloudformation list-stacks \
--stack-status-filter "CREATE_COMPLETE" \
--query "StackSummaries[].StackName" | \
grep -e "parallelclusternetworking-""parallelclusternetworking-pubpriv-20191029205804"
The stack can be deleted using the delete-stack command.
$ aws --region us-west-2 cloudformation delete-stack \
--stack-name parallelclusternetworking-pubpriv-20191029205804
If pcluster configure created a new VPC, you can delete that VPC by deleting the AWS CloudFormation stack it created. The name will start with “parallelclusternetworking-” and contain the creation time in a “YYYYMMDDHHMMSS” format. You can list the stacks using the list-stacks command.
Note: I can see why you wouldn’t want to delete the VPC, if you want to reuse the yaml file that contains the SubnetID that is tied to that VPC.
I was able to use the Amazon Website to find the SubnetID, and then identify the VPC that it is part of.
I currently have the following VPCs
Name |
VPC ID |
State |
IPv4 CIDR |
IPv6 CIDR (Network border group) |
IPv6 pool |
DHCP options set |
Main route table |
Main network ACL |
Tenancy |
Default VPC |
Owner ID |
|---|---|---|---|---|---|---|---|---|---|---|---|
ParallelClusterVPC-20211210200003 |
vpc-0445c3fa089b004d8 |
Available |
10.0.0.0/16 |
– |
– |
dopt-eaeaf888 |
rtb-048c503f3e6b9acc3 |
acl-0fecfa7ff42e04ead |
Default |
No |
xxxx |
ParallelClusterVPC-20211021183813 |
vpc-00e3f4e34aaf80f06 |
Available |
10.0.0.0/16 |
– |
– |
dopt-eaeaf888 |
rtb-0a5b7ac9873486bcb |
acl-0852d06b1170db68c |
Default |
No |
xxxx |
- |
vpc-3cfc5759 |
Available |
172.31.0.0/16 |
– |
– |
dopt-eaeaf888 |
rtb-99cd64fc |
acl-bb9b39de |
Default |
Yes |
440858712842 |
ParallelClusterVPC-20210419174552 |
vpc-0ab948b66554c71ea |
Available |
10.0.0.0/16 |
– |
– |
dopt-eaeaf888 |
rtb-03fd47f05eac5379f |
acl-079fe1be7ff972858 |
Default |
No |
xxxx |
ParallelClusterVPC-20211021174405 |
vpc-0f34a572da1515e49 |
Available |
10.0.0.0/16 |
– |
– |
dopt-eaeaf888 |
rtb-0b6310d9ea70a699e |
acl-01fa1529b65545e91 |
Default |
No |
xxxx |
This is the subnet id that I am currently using in the yaml files: subnet-018cfea3edf3c4765
I currently have 11 subnet IDs - how many are no longer being used?
Name |
Subnet ID |
State |
VPC |
IPv4 CIDR |
IPv6 CIDR |
Available IPv4 addresses |
Availability Zone |
Availability Zone ID |
Network border group |
Route table |
Network ACL |
Default subnet |
Auto-assign public IPv4 address |
Auto-assign customer-owned IPv4 address |
Customer-owned IPv4 pool |
Auto-assign IPv6 address |
Owner ID |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
parallelcluster:public-subnet |
subnet-018cfea3edf3c4765 |
Available |
vpc-0445c3fa089b004d8-ParallelClusterVPC-20211210200003 |
10.0.0.0/20 |
– |
4091 |
us-east-1a |
use1-az6 |
us-east-1 |
rtb-034bcab9e4b8c4023-parallelcluster:route-table-public |
acl-0fecfa7ff42e04ead |
No |
Yes |
No |
- |
No |
xx |