Coordinate rolling updates

An administrator uses a rolling update strategy with serial: 3 and max_fail_percentage: 20. They have 10 hosts in the inventory. The first batch of 3 hosts: 2 succeed, 1 fails. What happens next?

During a rolling update using an Ansible playbook with serial: 2, one host in the first batch becomes unreachable. The playbook fails with an unreachable host error. How should the administrator proceed to complete the update on the remaining hosts while excluding the problematic host?

Drag and drop the steps to configure a firewall rule using firewalld to allow HTTPS traffic in the correct order.

In OpenShift, a DeploymentConfig uses the RollingUpdate strategy. Which parameter controls the maximum number of pods that can be unavailable during an update?

You are managing a critical web application deployed on OpenShift with 12 replicas. The application must maintain at least 10 replicas available during updates to meet an SLA. You initiate a rolling update using the default strategy, but the rollout is progressing slowly because only 2 new pods are created at a time, causing a prolonged update duration. You need to speed up the rollout without violating the SLA (10 available replicas). The current Deployment configuration has maxSurge: 25% (3 pods) and maxUnavailable: 25% (3 pods). You have permission to update the DeploymentConfig during the active rollout. Which action should you take?

A company uses Ansible to perform a rolling update of 10 web servers behind an HAProxy load balancer. The playbook uses the `serial` keyword and includes tasks to disable a host from the load balancer, update the web server package, and re-enable the host. Which TWO best practices should the administrator apply to minimize downtime and ensure a successful rolling update?

The deployment has 4 replicas. During a rolling update, what is the maximum number of pods that can be unavailable at any single time?

Which THREE commands can verify the status of a rolling update on an OpenShift deployment?

An Ansible playbook uses the 'deployment' resource with a 'rolling_update' strategy. Which module is typically used to manage this in a Kubernetes/OpenShift environment?

You are managing a rolling update of a 10-node web application cluster using Ansible. The application requires that at least 8 nodes remain available during the update to handle traffic. You have written a playbook that uses serial: 2 (updates 2 nodes at a time). During a test run, the playbook updates the first batch of 2 nodes successfully, but when it proceeds to the second batch, one of the nodes fails to restart the web service. However, the playbook continues and updates the remaining nodes. At the end, only 7 nodes are healthy, causing performance degradation. You need to ensure that if a batch fails to meet the minimum health requirements, the entire rollout is stopped and no further updates are applied. Which course of action should you take?

Which THREE of the following are valid 'serial' values for an Ansible rolling update playbook?

An organization uses Ansible Automation Platform to perform rolling updates on a 5-node PostgreSQL replication cluster. The playbook uses `serial: 1` and includes tasks to promote a standby, demote the primary, update PostgreSQL packages, and then re-elect the original primary. The cluster health check task verifies that replication lag is under 10 seconds before proceeding to the next node. Recently, during an update of the primary node (node1), the health check after re-election fails because replication lag is 15 seconds due to a large write load. The playbook aborts, leaving the cluster in a degraded state with node1 updated but not serving as primary. The administrator needs to ensure that the update continues while still maintaining cluster integrity. Which action should the administrator take?

A team uses Ansible to update a database cluster with one primary and two replicas. The goal is zero downtime. Which update order is the safest?

An administrator runs this playbook against a group of 10 web servers. The update fails on the third host (host3) due to a yum error. What is the most likely outcome?

An organization uses Ansible Tower (AWX) for rolling updates. They have a job template that runs a playbook with serial: 5. The inventory contains 50 hosts. The update fails after the first batch due to a syntax error in a playbook. After fixing the error, the administrator wants to resume updating from where it left off without updating already successful hosts. Which approach achieves this?

Refer to the exhibit. The playbook uses serial: 1 (one host at a time). The update failed on web3.example.com. Based on the output, what is the most likely reason the play did not abort the rollout and how should the playbook be modified to stop on failure?

A company wants to implement a rolling update for a stateful application where hosts cannot be updated in parallel due to data consistency. They also need to ensure that if any host fails, the entire update is rolled back. Which strategy meets these requirements?

Which TWO options are valid techniques for rolling out updates to a subset of hosts before updating the rest? (Choose exactly two.)

A large enterprise manages thousands of servers grouped by data center. They are designing a rolling update that must complete within a maintenance window. Which combination of Ansible strategies best minimizes total update time while maintaining safety?

Which TWO conditions cause an Ansible rolling update playbook to abort immediately? (Choose exactly two.)

You are managing a Kubernetes cluster running a critical stateful application deployed as a StatefulSet with 3 replicas. The application uses persistent volumes with ReadWriteOnce access mode. You need to update the container image from version 1.0 to 1.1. The application's performance degrades if more than one replica is unavailable at any time. The StatefulSet is configured with the default RollingUpdate strategy (partition=0). You have a maintenance window of 30 minutes. The update must be completed within the window with minimal risk. Which of the following approaches should you take?

A DevOps engineer is responsible for coordinating a rolling update of a Red Hat OpenShift Container Platform 4.12 cluster with 10 worker nodes. The cluster hosts a stateful application that uses persistent volumes with ReadWriteOnce access mode. The update involves a minor version upgrade of the cluster from 4.12.0 to 4.12.5. The engineer uses the recommended `oc adm upgrade` command. During the update, after the first worker node is updated, the engineer notices that the node's status shows 'NotReady' and the cluster version operator reports a degraded status. A check of the node logs reveals 'kubelet: Failed to run kubelet: Could not get kubelet config from cluster: could not get config from cluster: context deadline exceeded'. Which action should the engineer take first?

A systems administrator is performing a rolling update of a three-node Red Hat Enterprise Linux 8 cluster running a load-balanced web application. The update involves upgrading the httpd package. The administrator uses Ansible to update one node at a time. After updating the first node, the administrator checks the application health and finds that the node is serving requests correctly. The administrator proceeds to update the second node. However, after the second node update completes, the load balancer reports that both the first and second nodes are unavailable. What is the most likely cause?

An Ansible rolling update playbook has 'serial: 1' and 'max_fail_percentage: 0'. During the update of a 5-host group, the first host fails. What is the outcome?

Which TWO of the following are best practices when coordinating rolling updates with Ansible?

An administrator notices that during a rolling update, the playbook seems to hang after updating the first host. The playbook uses serial: 5. What is the most likely cause?

Which TWO Ansible playbook parameters directly control the number of host failures allowed before aborting a rolling update?

A team uses Ansible to update a web application across 10 servers with minimal downtime. Which playbook directive achieves one-at-a-time updates?

An operations team is planning a rolling update of a production OpenShift cluster running Red Hat Enterprise Linux CoreOS nodes. Which three practices should be followed to ensure minimal downtime and proper rollback capability?

A team runs the playbook shown in the exhibit. They notice that during the update, some requests are still being sent to servers that have been disabled. What is the most likely cause?

An operations team is designing a rolling update for a stateful application that requires quorum (minimum 3 out of 5 nodes online). They plan to use Ansible's serial keyword. Which serial value ensures the update proceeds without breaking quorum while still being efficient?

An OpenShift deployment is stuck in a degraded state after a rolling update. Which command helps diagnose the root cause by showing status conditions?

There are 5 hosts in the webservers group. All updates succeed on the first batch of 2 hosts. On the second batch, one host fails. What is the result?

An administrator wants to update a web server fleet with minimal downtime. They need to update each server one at a time. Which Ansible playbook directive should be used?

An OpenShift rolling update is failing because new pods crash immediately. Which parameter automatically triggers a rollback if no progress is made?

An administrator needs to update a web application that runs as a Kubernetes Deployment with 5 replicas. The application is stateless, but the update must not cause any downtime. Which TWO strategies ensure zero-downtime rolling updates?

Which THREE statements correctly describe the behavior of the 'serial' keyword in Ansible? (Choose exactly three.)

What is the effect of setting 'serial: 5' in an Ansible playbook that targets a group of 20 hosts?

An Ansible Engineer is planning a rolling update for a web application deployed across 10 nodes. The playbook uses the 'delegate_to' directive to manage load balancer health checks. Which of the following best describes the recommended approach to minimize downtime?

Match each Ansible playbook directive to its purpose.

Which TWO options are best practices for coordinating rolling updates with Ansible? (Choose exactly two.)

A company uses Ansible to manage rolling updates of a web server fleet. During a deployment, the playbook fails on one host due to a transient network error, and the rest of the fleet is left in an inconsistent state. Which strategy would best minimize the risk of inconsistency in future rolling updates?

An Ansible rolling update playbook includes 'max_fail_percentage: 20'. If more than 20% of hosts fail during any batch, what happens?

In OpenShift, a deployment must gradually shift traffic to new pods during a rolling update. Which default strategy achieves this?

An Ansible playbook sets 'serial: 20%' for rolling updates, but the inventory contains 5 hosts. How many hosts are updated simultaneously?