Docker Interview Questions and Answer Part – 18
If you want to perform maintenance on a node, to what availability should you change it? Ready Down Drain (Ans) Pause Active Assuming you have a stack called APIS, what…
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Docker Interview Questions and Answer Part – 17
If you run docker network ls and do not see a network that you’re looking for, what is the most likely culprit?culprit? That node is not a worker node. That…
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Docker Interview Questions and Answer Part – 16
Which of the following will upload a new stack to your Docker Cloud account? docker-cloud stack create docker-cloud.yml docker-cloud stack create -f docker-cloud.yml (Ans) docker-cloud stack create -f dockerfile docker…
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Docker Interview Questions and Answer Part – 15
Which fundamental networking technology does the native (local) overlay driver leverage when creating multi-host container networks? VLAN Token Ring VXLAN (Ans) FCoE You need to create a singe container network…
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Docker Interview Questions and Answer Part – 14
What is the function of this command? docker search apache/ubuntu It will search your local Docker client environment for images related to either apache or ubuntu. It will search Docker…
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Docker Interview Questions and Answer Part – 13
Which of the following problems (not solved by hypervisor virtualization) do containers solve? Heterogeneous application management Network Function Virtualization (NFV) Software Defined Storage (SDS) Overheads incurred by the multiplicity of…
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Docker Interview Questions and Answer Part – 12
Which of the following flags tells the Swarm Manager process that it will be part of a highly available multi-manager configuration? –replicate –replication (Ans) –multi-manager –multi-master Which three scheduling strategies…
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Docker Interview Questions and Answer Part – 11
Which of the following are the standard secured and unsecured Docker engine daemon ports? 2375 (unsecured), 2376 (secured) (Ans) 4000 (unsecured), 4001 (secured) 3375 (unsecured), 3376 (secured) 80 (unsecured), 443…
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Docker Interview Questions and Answer Part – 10
What is a dangling volume? The default volume for the container file system that’s unpacked from the image A volume that’s removed from a running container A volume that’s not…
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Docker Interview Questions and Answer Part – 9
Where does the file system come from for a container? From a remote network share hosted through Hyper-V From the machine the container is started on From the image used…
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Docker Interview Questions and Answer Part – 8
The docker history command shows output similar to which of the following? Dockerfile (Ans) docker-compose.yml docker images docker layers docker ps What is a tag? A reference to a registry…
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Docker Interview Questions and Answer Part – 7
Docker recommends using the responsible disclosure model for reporting vulnerabilities in the Docker platform. What does this mean? Simultaneously report the vulnerability to Docke and openly publish details of the…
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Docker Interview Questions and Answer Part – 6
An admin has configured the Linux audit framework to generate audit events for the Docker daemon’s data root. After a recent OS update, the data root is no longer being…
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Docker Interview Questions and Answer Part – 5
Is it ever possible to run a Linux-based container on a Microsoft Windows platform? Yes, Docker containers abstract away the underlying operating system, which means the container can run on…
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Docker Interview Questions and Answer Part – 4
Which of the following will display the specific command that created each layer in an image? docker search imagename docker images -t imagename docker history imagename (Ans) docker build -th…
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Docker Error – Requires: container-selinux >= 2:2.74
Error\ Solution Go to http://mirror.centos.org/centos/7/extras/x86_64/Packages/ Find the latest version for container-selinux i.e. container-selinux-2.21-1.el7.noarch.rpm Run the following command on your terminal: $ sudo yum install -y yum install http://mirror.centos.org/centos/7/extras/x86_64/Packages/container-selinux-2.107-1.el7_6.noarch.rpm yum install…
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Docker Interview Questions and Answer Part – 3
Whats is docker? Difference between container & VMs? Difference between Docker & Virtualization? Difference between container and image? How image builds? What are image layers? How image layers work? What…
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Docker Interview Questions and Answer Part – 2
What is Docker compose? What is Docker server version? What are the advantages of Docker? How do you setup Docker in Jenkins in production environment? How do create Docker image…
Read more »Docker Interview Questions and Answer Part – 1
What happens when you run docker run hello-world? How do you run a container? What do you see when you run docker ps? What docker commit does? when will you use it? Explain what…
Read more »Docker Error: JOB FOR DOCKER.SERVICE FAILED BECAUSE THE CONTROL PROCESS EXITED WITH ERROR CODE
[root@localhost ~]# systemctl restart docker Job for docker.service failed because the control process exited with error code. See “systemctl status docker.service” and “journalctl -xe” for details. [root@localhost ~]# [root@localhost ~]#…
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Docker Tutorials: Difference between Docker Load and Docker Import
If you want to “flatten” an image and avoid the history which has multiple layers, docker export and import is the best way to do that. docker save – docker…
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Alternative of Docker in Kubernetes
Since v1.6.0, Kubernetes has enabled the use of CRI, Container Runtime Interface, by default. The container runtime used by default is Docker, which is enabled through the built-in dockershim CRI…
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How to troubleshoot Docker Server(daemon) and Containers?
How to troubleshoot Docker Server(daemon) and Containers? There are following way using troubleshooting of Docker Server and Containers can be done. If you are running your container in -d (detached…
Read more »Top 10 Container(Docker) Monitoring Solutions and Tools in 2018
Top 10 Container Monitoring Solutions/Tools in 2018 Native Docker cAdvisor Scout Pingdom Datadog Sysdig Prometheus Heapster / Grafana ELK stack Sensu Reference https://rancher.com/comparing-10-container-monitoring-solutions-rancher/ Docker Tutorials Fundamental To Advanced-2021 Crash Course:-…
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Understanding the tools sets in Docker ecosystem
Docker Engine Docker Engine is our lightweight and powerful open source containerization technology combined with a work flow for building and containerizing your applications. Docker Engine is a client-server application…
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How to run UI testing in Docker container using Selenium
Docker is one of the revolutions technologies which has created lots of buzz in the Software development practices. Docker has not only helped to setup Continuous Integration and Delivery but…
Read more »Docker Errors and Solutions Guide
Error: Failed to get D-Bus connection: Operation not permitted I am having issue running or checking status on any services in Docker in Centos 7. I get: “Failed to get…
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docker-compose prepends current directory name to named volumes
Issues – docker-compose prepends current directory name to named volumes What actually happens is that the named volume gets prepended with (a simplified version of) the directory name from which the…
Read more »Docker Error: Docker Toolboox error in Windows
rajeshkumar created the topic: Docker Toolboox error in Windows Error error during connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.26/info: open //./pipe/docker_engine: The system cannot find the file specified. In the defau lt daemon configuration…
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Docker Training | Docker Course | Agenda
Need to learn Docker? This is the training for you! This training provides a soup-to-nuts learning experience for core Docker technologies, including the Docker Engine, Images, Containers, Registries, Networking, Storage,…
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