ObjectiveThe company has been using the traditional Tomcat to drop the war package architecture system, with the increase of the project, the number of servers, the need to spend a lot of time on different server system environment issues. In order to advance the technology and the operational efficiency of the work, the author introduced the Docker container deployment mode, through the Gitlab+jenkins+harb
Preface
Everyone uses Docker to download images from the container repository, but this process may depend on the bandwidth of the network, so if you migrate a downloaded image to another environment, or how to implement a backup or restore of a docker container, or migrate, let's talk about it a bit.
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ObjectiveUsually in the Docker experiment, you will often need to modify some configuration parameters, some parameters modified, it is necessary to restart the Docker background process daemon to take effect, but after the Docker daemon restarts, may cause the running container to force shutdown. This is inconvenient
Update Docker containerAfter installing Redmine with Docker, it's been a long time, and in the days of maintaining the server, the Redmine version was also upgraded.Just think about upgrading the container, too.First, the general idea:
Upgrade Docker Image
Close on the
Package a Docker image so that your friends can load and open a container and output hello and world to the specified file every second,
I. Two script codes
Dockerfile
1 FROM bash2 COPY . /usr/herui/3 WORKDIR /usr/herui/4 CMD [ "sh", "hello_world.sh" ]
Hello_world.sh
1 #!/bin/bash2 while true3 do4 echo 'hello world!' >> /usr/herui/hello_world.log5 sleep 16 done
Ii. package it into an image
1,
1 [root@loca
Click to have a surprise
With the stack YAML file defined, the application can be deployed through the Docker stack deploy command.
Docker will create the various resources according to the YAML content. In order to not duplicate the name, all resources will be prefixed with the stack names, and we are here wpstack_*.
After deployment is complete, you ca
Some students have installed nginx under Docker but do not know where the directory is, you can use the command" 50x.html "Because Nginx is bound to have 50x.html, so look for it, the results found Nginx directory in the Docker container, if you operate it, you need to enter the container shell.The
clusterrolebinding kubelet-bootstrap--clusterrole=system:node-bootstrapper--user=kubelet-bootstrapFifth step: Start Kubelet on the node server, you can view the CSR certificate on MasterAfter the certificate is generated, you need to allow the certificateKUBECTL Certificate Approve certificate name (that is, the name value above)Then you can see the status of the cluster.KUBECTL Get nodeAt this point, the k8s cluster deployment is complete.Next, we'll test the deployment WebUI.See3. Deploy WebU
Create a private repository for docker and a private repository for docker
Thanks to the network speed and the performance of the Greater China LAN, the image download speed in DockerHub is very slow. Even some domestic image warehouses do not feel very fast. Therefore, it is necessary to build an image repository locally or in a place that we can access quickly
It took a great effort to download the installation image of Docker Community editor from the Docker website, DOCKER.DMG, a total of nearly 500MB, double-click to install:In the command line, use Docker version to view versions:Then use the command line Docker run Hello-world, and encounter the error message: Error res
In the previous section we deployed ETCD, and this section installs and configures flannel. Build Flannel
Flannel do not have a ready-made executable file available, you must build it yourself, the most reliable way is to build in the Docker container. But for build Docker mirror hosting in Gcr.io, domestic may not be directly accessible, for the convenience of e
Link modehttp://blog.csdn.net/halcyonbaby/article/details/42112325The container is created by link, and then we can access it using the alias of the link container.This will remove the application's reliance on the IP.Unfortunately, the link method only solves the interconnection between single-machine containers. In multi-machine cases, the interconnection of containers requires other means.[[emailprotected] ~]#
Development Course Edgeservice3-14 ApigatewayzuulChapter 4th Prelude to service arrangementTo prepare for the service orchestration, first we docker all microservices and then use the native Docker-compose to run them in the container and ensure that they can communicate with each other in the container as well. Final
current cluster is to execute kubeadm reset it on each node . You can then initialize the cluster as we did in the "Initializing Master" section of the "Deploying Kubernetes Cluster" chapter earlier. Kubeadm Init--apiserver-advertise-address 192.168.56.105--pod-network-cidr=10.244.0.0/16then follow the documentation https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ install Canal. The documentation lists the installation methods for
through the date command.
However, the time of the program running in the container may not be updated, such as the MySQL service running in the container, and after the update time, view the MySQL time through SQL
Select Now () from dual;
It can be found that time has not changed over.
At this point, you must restart the MySQL service or restart the Doc
If you want to get into container and look around, you can use:Docker container execTo run against a running container. And to does that, we need to know the id/name of the running container.To get id/name of the container, we can do:LsFor example, the name of the container
/ Kubernetes-dashboard.yamlDashboard will be in kube-system Create your own Deployment and Service in namespace. because the Service isClusterIPtype, for ease of use, we cankubectl --namespace=kube-system edit service kubernetes-dashboardmodified intoNodePorttype. Save the changes and the Service has been assigned a port 31614 at this time . Access Dashboard https://192.168.56.105:31614/ through the browser , the login interface is as follows:Configur
Automatically create a reverse nginx proxy for the docker container.
A reverse proxy server is a type of server usually located before a web server. it can provide attachments that are not provided by the web server itself.
For example, the reverse proxy can provide SSL termination, server load balancer, request routing, cache, compression, and even A/B testing.
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