How do I implement blue/green deployments for ETCD?

Blue/green deployments for ETCD allow for smooth upgrades and seamless rollbacks, ensuring high availability of your distributed systems. This strategy helps mitigate downtime and provides a safe environment for testing new features.
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// Example of Blue/Green Deployment for ETCD // Create two separate ETCD clusters, "blue" and "green" // Step 1: Deploy the new version on the "green" cluster system('ETCD_VERSION=new-version docker run -d --name etcd-green etcd:latest'); // Step 2: Promote "green" as the active cluster system('docker stop etcd-blue'); system('docker rename etcd-blue etcd-blue-old'); // backup old cluster system('docker rename etcd-green etcd-blue'); // Step 3: Verify that "blue" is pointing to the new "green" cluster // Once verified, you can remove the old cluster after a grace period system('docker rm etcd-blue-old'); // rollback if needed // to rollback, just stop the "blue", and rename "blue-old" back to "blue"

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