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How to pull the new image to kubernetes from docker hub without effecting the running pod?
How is Docker different from a virtual machine?How to get a Docker container's IP address from the host?Exploring Docker container's file systemCopying files from host to Docker containerHow to copy Docker images from one host to another without using a repositoryHow to upgrade docker container after its image changedHow to remove old and unused Docker imagesHow to force Docker for a clean build of an imageHow to access private Docker Hub repository from Kubernetes on VagrantHow to use local docker images with Minikube?
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I am setting up an application in kubernetes and want to restart the pod if the new image is pushed into docker hub.
I am not able to restart the pod if the new image is pushed into docker hub registry?
I have included
"imagePullPolicy": "Always"
"terminationGracePeriodSeconds": 30
in deployment.yaml file
How to pull the new image to pod without stopping the existing pod?
docker
kubernetes docker-compose asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
add a comment |
I am setting up an application in kubernetes and want to restart the pod if the new image is pushed into docker hub.
I am not able to restart the pod if the new image is pushed into docker hub registry?
I have included
"imagePullPolicy": "Always"
"terminationGracePeriodSeconds": 30
in deployment.yaml file
How to pull the new image to pod without stopping the existing pod?
docker
kubernetes docker-compose asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
add a comment |
I am setting up an application in kubernetes and want to restart the pod if the new image is pushed into docker hub.
I am not able to restart the pod if the new image is pushed into docker hub registry?
I have included
"imagePullPolicy": "Always"
"terminationGracePeriodSeconds": 30
in deployment.yaml file
How to pull the new image to pod without stopping the existing pod?
docker
kubernetes docker-compose asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
I am setting up an application in kubernetes and want to restart the pod if the new image is pushed into docker hub.
I am not able to restart the pod if the new image is pushed into docker hub registry?
I have included
"imagePullPolicy": "Always"
"terminationGracePeriodSeconds": 30
in deployment.yaml file
How to pull the new image to pod without stopping the existing pod?
docker
kubernetes docker-compose docker
kubernetes docker-compose asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
asked Mar 25 at 13:24
rakeshh92rakeshh92
247 bronze badges
247 bronze badges
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Even in plain Docker, you can never update a container to a newer image without deleting and recreating it. This is also impossible in Kubernetes: the list of containers in a pod spec “cannot currently be added or removed...cannot be updated”, which means you can never change the image on an existing Pod.
In Kubernetes, the best practice is to always use an explicit version tag (never latest or anything similar that’s expected to change) and to manage Pods with Deployments. When you have a new build, change your Deployment spec to have the new tag. Kubernetes will notice that the new Deployment is different from the old one, and will, in order:
- Start a new Pod with the new image;
- Wait for its health checks to pass; and
- Delete the old Pod.
This results in a zero-downtime upgrade.
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
add a comment |
A pod launched is immutable, if you make a image change in a deployment it will change only when the new containers are launched and the old ones deleted.
Use deployments to launch your pods. Launch the following command to change the image:
kubectl set image deployment/DEPLOY_NAME container-name=image_path:version
The deploy will take care of killing the old pods and launching new ones.
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Even in plain Docker, you can never update a container to a newer image without deleting and recreating it. This is also impossible in Kubernetes: the list of containers in a pod spec “cannot currently be added or removed...cannot be updated”, which means you can never change the image on an existing Pod.
In Kubernetes, the best practice is to always use an explicit version tag (never latest or anything similar that’s expected to change) and to manage Pods with Deployments. When you have a new build, change your Deployment spec to have the new tag. Kubernetes will notice that the new Deployment is different from the old one, and will, in order:
- Start a new Pod with the new image;
- Wait for its health checks to pass; and
- Delete the old Pod.
This results in a zero-downtime upgrade.
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
add a comment |
Even in plain Docker, you can never update a container to a newer image without deleting and recreating it. This is also impossible in Kubernetes: the list of containers in a pod spec “cannot currently be added or removed...cannot be updated”, which means you can never change the image on an existing Pod.
In Kubernetes, the best practice is to always use an explicit version tag (never latest or anything similar that’s expected to change) and to manage Pods with Deployments. When you have a new build, change your Deployment spec to have the new tag. Kubernetes will notice that the new Deployment is different from the old one, and will, in order:
- Start a new Pod with the new image;
- Wait for its health checks to pass; and
- Delete the old Pod.
This results in a zero-downtime upgrade.
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
add a comment |
Even in plain Docker, you can never update a container to a newer image without deleting and recreating it. This is also impossible in Kubernetes: the list of containers in a pod spec “cannot currently be added or removed...cannot be updated”, which means you can never change the image on an existing Pod.
In Kubernetes, the best practice is to always use an explicit version tag (never latest or anything similar that’s expected to change) and to manage Pods with Deployments. When you have a new build, change your Deployment spec to have the new tag. Kubernetes will notice that the new Deployment is different from the old one, and will, in order:
- Start a new Pod with the new image;
- Wait for its health checks to pass; and
- Delete the old Pod.
This results in a zero-downtime upgrade.
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
Even in plain Docker, you can never update a container to a newer image without deleting and recreating it. This is also impossible in Kubernetes: the list of containers in a pod spec “cannot currently be added or removed...cannot be updated”, which means you can never change the image on an existing Pod.
In Kubernetes, the best practice is to always use an explicit version tag (never latest or anything similar that’s expected to change) and to manage Pods with Deployments. When you have a new build, change your Deployment spec to have the new tag. Kubernetes will notice that the new Deployment is different from the old one, and will, in order:
- Start a new Pod with the new image;
- Wait for its health checks to pass; and
- Delete the old Pod.
This results in a zero-downtime upgrade.
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
answered Mar 25 at 13:41
David MazeDavid Maze
20k3 gold badges17 silver badges33 bronze badges
20k3 gold badges17 silver badges33 bronze badges
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
add a comment |
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
Thank you @David Maze
– rakeshh92
Mar 25 at 13:47
add a comment |
A pod launched is immutable, if you make a image change in a deployment it will change only when the new containers are launched and the old ones deleted.
Use deployments to launch your pods. Launch the following command to change the image:
kubectl set image deployment/DEPLOY_NAME container-name=image_path:version
The deploy will take care of killing the old pods and launching new ones.
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
add a comment |
A pod launched is immutable, if you make a image change in a deployment it will change only when the new containers are launched and the old ones deleted.
Use deployments to launch your pods. Launch the following command to change the image:
kubectl set image deployment/DEPLOY_NAME container-name=image_path:version
The deploy will take care of killing the old pods and launching new ones.
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
add a comment |
A pod launched is immutable, if you make a image change in a deployment it will change only when the new containers are launched and the old ones deleted.
Use deployments to launch your pods. Launch the following command to change the image:
kubectl set image deployment/DEPLOY_NAME container-name=image_path:version
The deploy will take care of killing the old pods and launching new ones.
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
A pod launched is immutable, if you make a image change in a deployment it will change only when the new containers are launched and the old ones deleted.
Use deployments to launch your pods. Launch the following command to change the image:
kubectl set image deployment/DEPLOY_NAME container-name=image_path:version
The deploy will take care of killing the old pods and launching new ones.
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
answered Mar 25 at 13:49
Leandro Donizetti SoaresLeandro Donizetti Soares
2061 silver badge7 bronze badges
2061 silver badge7 bronze badges
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
add a comment |
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
1
1
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
Thank you @Leandro I am getting error: unable to find container named "container-name" if I execute the above command.
– rakeshh92
Mar 26 at 6:03
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
have you replace by your container name?
– Leandro Donizetti Soares
Mar 26 at 14:14
add a comment |
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