How to fix 'Name does not resolve' error in RHEL / Rocky Linux 8 with Podman

Overview

By default, Rocky Linux / RHEL 8.x uses the CNI DNS plugin as its container networking DNS backend (most common with Podman + CNI). This can cause services to fail to communicate with the database or external network.

Rocky Linux / RHEL 9.x ships with aardvark-dns and netavark, Podman's modern network stack, which resolves these issues.

Info

Long-term recommendation: Upgrade to Rocky Linux / RHEL 9. The steps below are a workaround for systems that cannot yet be upgraded.

Temporary solution: Change DNS library

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⚠️ Note: This procedure requires an active internet connection and must be performed with sudo (root) privileges.

Step 1: Stop MDSS

sudo mdss -c stop

Step 2 — Install netavark and aardvark-dns

sudo dnf install -y netavark aardvark-dns

Step 3 — Configure Podman to Use the new network backend

Edit /etc/containers/containers.conf and add the following section:

[network] network_backend = "netavark" dns_enabled = true
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If the file does not exist, create it at /etc/containers/containers.conf.

Step 4 — Clean Up Old Podman Configuration

Remove the old CNI network configuration and restart Podman:

sudo podman container prune -f sudo podman network prune -f sudo rm -rf /etc/cni/net.d/* sudo rm -rf /var/lib/cni/networks/* sudo systemctl restart podman

Step 5 - Validate the new DNS library is used

Run these commands:

echo "Network Backend: $(sudo podman info --format '{{.Host.NetworkBackend}}')" echo "DNS Packages: $(rpm -qa | grep -E 'dnsname|netavark|aardvark')"

You should see something like this:

Network Backend: netavark DNS Packages: aardvark-dns-1.16.0-1.el9.x86_64

Step 6 — Start MDSS

sudo mdss -c start

It should now work as expected.

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How to fix 'Name does not resolve' error in RHEL / Rocky Linux 8 with PodmanOverviewTemporary solution: Change DNS libraryStep 1: Stop MDSSStep 2 — Install netavark and aardvark-dnsStep 3 — Configure Podman to Use the new network backendStep 4 — Clean Up Old Podman ConfigurationStep 5 - Validate the new DNS library is usedStep 6 — Start MDSS