Skip to content

[backports-release-1.10]: Distributed: Worker: Bind to the first non-link-local IPv4 address #58895

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jul 8, 2025
Merged

[backports-release-1.10]: Distributed: Worker: Bind to the first non-link-local IPv4 address #58895

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 23 additions & 1 deletion stdlib/Distributed/src/cluster.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1262,6 +1262,28 @@ function terminate_all_workers()
end
end

function choose_bind_addr()
# We prefer IPv4 over IPv6.
#
# We also prefer non-link-local over link-local.
# (This is because on HPC clusters, link-local addresses are usually not
# usable for communication between compute nodes.
#
# Therefore, our order of preference is:
# 1. Non-link-local IPv4
# 2. Non-link-local IPv6
# 3. Link-local IPv4
# 4. Link-local IPv6
addrs = getipaddrs()
i = something(
findfirst(ip -> !islinklocaladdr(ip) && ip isa IPv4, addrs), # first non-link-local IPv4
findfirst(ip -> !islinklocaladdr(ip) && ip isa IPv6, addrs), # first non-link-local IPv6
findfirst(ip -> ip isa IPv4, addrs), # first IPv4
findfirst(ip -> ip isa IPv6, addrs), # first IPv6
)
return addrs[i]
end

# initialize the local proc network address / port
function init_bind_addr()
opts = JLOptions()
Expand All @@ -1276,7 +1298,7 @@ function init_bind_addr()
else
bind_port = 0
try
bind_addr = string(getipaddr())
bind_addr = string(choose_bind_addr())
catch
# All networking is unavailable, initialize bind_addr to the loopback address
# Will cause an exception to be raised only when used.
Expand Down