Failed To Fetch Key At Https //download 2021.docker.com/linux/centos/gpg May 2026

sudo rpm --import https://download.docker.com/linux/centos/gpg Use code with caution. [Source: Docker Community Forums ] 3. Update CA Certificates

[docker-ce-stable] name=Docker CE Stable - $basearch baseurl=https://docker.com enabled=1 gpgcheck=1 gpgkey=https://download.docker.com/linux/centos/gpg Use code with caution. [Source: Stack Overflow ] Verification Failed to add docker GPG key on AlmaLinux 10 #530 - GitHub

The system might fail to resolve download.docker.com . Forcing IPv4 can sometimes resolve this. sudo rpm --import https://download

If yum-config-manager continues to fail, create the repository file manually to bypass the script: Create a new file: sudo vi /etc/yum.repos.d/docker-ce.repo Paste the following configuration:

Sometimes corrupted local metadata causes the fetch to fail. Clean your repository cache before retrying: sudo yum clean all sudo rm -rf /var/cache/yum Use code with caution. [Source: Super User ] 2. Manually Import the GPG Key [Source: Stack Overflow ] Verification Failed to add

If you encounter "SSL certificate problem" errors, your system's trust store may be outdated:

Your server may be behind a firewall or proxy that blocks outbound HTTPS requests to Docker's servers. Clean your repository cache before retrying: sudo yum

The error message typically occurs when installing Docker on CentOS or RHEL-based systems. This block often stops the installation process because the system cannot verify the authenticity of the Docker packages without this cryptographic key. Common Causes

If the automated yum-config-manager script fails, you can manually import the GPG key into your RPM database: