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Shortening RHEL/Rock boot time by deprioritizing ipv6 and disable internet check #2905

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Merged
merged 2 commits into from
Mar 14, 2025
Merged

Shortening RHEL/Rock boot time by deprioritizing ipv6 and disable internet check #2905

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cde76a9
Shortening RHEL/Rock boot time by deprioritizing ipv6 and disable int…
hanwen-cluster Mar 13, 2025
b4b118e
Merge branch 'release-3.13' into release-3.13
hanwen-cluster Mar 14, 2025
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,10 @@ This file is used to list changes made in each version of the AWS ParallelCluste
- Remove generation of DSA keys for login nodes as DSA, which became unsupported in OpenSSH 9.7+.
- Set instance ID and instance type information in Slurm upon compute nodes launch.
- Install NVIDIA drivers without the option 'no-cc-version-check', which is now deprecated in the NVIDIA installer.
- Reduce RHEL/Rocky Linux boot time by the following network customization:
- Configuring higher priority to IPv4 than IPv6
- Disabling Internet connectivity check
- Configuring only IPv4 IMDS endpoint to cloud-init

**BUG FIXES**
- Remove usage of cfn-init for compute node bootstrapping to reduce node scale-up time.
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3 changes: 3 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/files/redhat/dns_domain/99-disable-ipv6-metadata.cfg
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@@ -0,0 +1,3 @@
datasource:
Ec2:
metadata_urls: [ 'http://169.254.169.254' ]
7 changes: 7 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/files/redhat/dns_domain/NetworkManager.conf
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Expand Up @@ -23,6 +23,13 @@
plugins = ifcfg-rh,
dhcp = dhclient

[connection]
ipv4.route-metric=100
ipv6.route-metric=200

[connectivity]
enabled=false

[logging]
# When debugging NetworkManager, enabling debug logging is of great help.
#
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3 changes: 3 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/files/rocky/dns_domain/99-disable-ipv6-metadata.cfg
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
datasource:
Ec2:
metadata_urls: [ 'http://169.254.169.254' ]
7 changes: 7 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/files/rocky/dns_domain/NetworkManager.conf
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Expand Up @@ -23,6 +23,13 @@
plugins = ifcfg-rh,
dhcp = dhclient

[connection]
ipv4.route-metric=100
ipv6.route-metric=200

[connectivity]
enabled=false

[logging]
# When debugging NetworkManager, enabling debug logging is of great help.
#
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10 changes: 10 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/resources/dns_domain/dns_domain_redhat8.rb
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Expand Up @@ -33,6 +33,16 @@
mode '0644'
end

# Disable ipv6 IMDS in cloud init to speed up
cookbook_file '99-disable-ipv6-metadata.cfg' do
path '/etc/cloud/cloud.cfg.d/99-disable-ipv6-metadata.cfg'
source 'dns_domain/99-disable-ipv6-metadata.cfg'
cookbook 'aws-parallelcluster-slurm'
user 'root'
group 'root'
mode '0644'
end

action_update_search_domain
network_service 'Restart network service'
end
10 changes: 10 additions & 0 deletions cookbooks/aws-parallelcluster-slurm/resources/dns_domain/dns_domain_rocky8.rb
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Expand Up @@ -33,6 +33,16 @@
mode '0644'
end

# Disable ipv6 IMDS in cloud init to speed up
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@himani2411 himani2411 Mar 14, 2025

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Can we add tests for these?

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@hanwen-cluster hanwen-cluster Mar 14, 2025

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Yes, can we add unit tests in a separate PR?

cookbook_file '99-disable-ipv6-metadata.cfg' do
path '/etc/cloud/cloud.cfg.d/99-disable-ipv6-metadata.cfg'
source 'dns_domain/99-disable-ipv6-metadata.cfg'
cookbook 'aws-parallelcluster-slurm'
user 'root'
group 'root'
mode '0644'
end

action_update_search_domain
network_service 'Restart network service'
end
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