Research Questions Disaster Recovery Docker Swarm
References:
- https://docs.docker.com/engine/reference/commandline/service_update/
- https://docs.docker.com/engine/swarm/admin_guide/
- https://docs.docker.com/engine/swarm/admin_guide/#recover-from-losing-the-quorum
- https://docs.docker.com/engine/reference/commandline/swarm_init/
- https://docs.docker.com/engine/reference/commandline/node_promote/
- https://docs.docker.com/engine/swarm/admin_guide/#back-up-the-swarm
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Question 1 of 20
1. Question
In a Docker swarm cluster, when a failed node is brought back online it is ready to accept new workloads and existing workloads are automatically rebalanced.
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Question 2 of 20
2. Question
What is the command to rebalance the docker swarm cluster workloads if absolutely necessary?
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Question 3 of 20
3. Question
A swarm cluster runs with 5 manager and 5 worker nodes with 10 replicas of an application running across all worker nodes. Which of the below statements are true when 3 manager nodes do go down at the same time.
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Question 4 of 20
4. Question
We could add a new node to the cluster as a manager but we cannot promote an existing worker node to be the manager.
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Question 5 of 20
5. Question
You should have at least 3 managers in the swarm cluster to support manager node failures.
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Question 6 of 20
6. Question
Which statement best describes Quorum?
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Question 7 of 20
7. Question
Which of the below configurations can tolerate 3 manager node failures?
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Question 8 of 20
8. Question
For any given number of N nodes, What is the quorum value?
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Question 9 of 20
9. Question
What is the command to forcefully create a cluster from its current state?
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Question 10 of 20
10. Question
What is the command to promote a node to manager in docker swarm cluster?
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Question 11 of 20
11. Question
Which of the following statements are true? Select all the answers that apply.
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Question 12 of 20
12. Question
The RAFT DB helps in restoring the services and any other configuration in a swarm cluster.
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Question 13 of 20
13. Question
What are the steps that we need to follow to backup the swarm database?
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Question 14 of 20
14. Question
It is recommended to perform a backup on the swarm leader node.
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Question 15 of 20
15. Question
What is the command to enable automatic locking of managers with an encryption key?
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Question 16 of 20
16. Question
What is the command to disable auto lock for a docker swarm cluster that has it enabled already?
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Question 17 of 20
17. Question
The auto lock key is required when the cluster is restored, so it must be kept safe in an external password manager.
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Question 18 of 20
18. Question
The auto lock key is backed up along with the Swarm backup.
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Question 19 of 20
19. Question
What are the prerequisites for restoring swarm?
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Question 20 of 20
20. Question
Which of the following steps are required on each manager node to restore data to a new swarm?
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