1. Introduction
This full introductionAsp.netHow the core web api is deployed in a docker container and accesses web api services externally.After you have finished writing the dockerfile, you can create a mirror with the docker [image] build command.
The basic format is: docker build [options] path | url | -
The command reads the dickerfile at the specified path, including subdirectories, and sends all data under that path to the docker server as a context.After checking the dockerfile format, the docker server executes the instructions defined in the dockerfile. When it encounters ADD, COPY and RUN instructions, a new image is generated.Finally, if the mirror is created successfully, the ID of the final image is returned.
1. dockerfile file file creation
CreateAsp.netCore web API application, project name: k8swebapi.The dockerfile is as follows:
FROM mcr.microsoft.com/dotnet/core/aspnet:2.2 AS runtime
WORKDIR /app
EXPOSE 5000
COPY . .
ENTRYPOINT ["dotnet", "k8swebapi.dll", "--urls", "http://*:5000;http://*:5001"]
2. Upload
*Asp.netAfter the core web API is published, upload to the cloud server opt directory
[root@VM_0_12_centos opt]# ls containerd kubectl-1.17.3-0.x86_64.rpm rh webapipublish
Locate in the webapipublish directory to view the web file you just uploaded
[root@VM_0_12_centos opt]# cd webapipublish [root@VM_0_12_centos webapipublish]# ls appsettings.Development.json Microsoft.OpenApi.dll appsettings.json Swashbuckle.AspNetCore.Swagger.dll dll Swashbuckle.AspNetCore.SwaggerGen.dll Dockerfile Swashbuckle.AspNetCore.SwaggerUI.dll k8swebapi.deps.json System.Runtime.CompilerServices.Unsafe.dll k8swebapi.dll System.Text.Encodings.Web.dll k8swebapi.pdb System.Text.Json.dll k8swebapi.runtimeconfig.json web.config k8swebapi.Views.dll wwwroot k8swebapi.Views.pdb YLYUN.Common.Dapper.dll Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer.dll YLYUN.Common.Dapper.pdb Microsoft.AspNetCore.Mvc.Versioning.dll YLYUN.Common.Dapper.xml Microsoft.Bcl.AsyncInterfaces.dll
3. Build a mirror
Execution format: docker build-t <name of the image to be generated>.
* k8swebapi is the name of the image
Ending. refers to the dockerfile path (. stands for the context path because the dockerfile is in the current directory)
[root@VM_0_12_centos webapipublish]# docker build -t k8swebapi .
Sending build context to Docker daemon 7.513MB
Step 1/5 : FROM mcr.microsoft.com/dotnet/core/aspnet:2.2 AS runtime
---> e7e3b238011c
Step 2/5 : WORKDIR /app
---> Running in f6496d30d085
Removing intermediate container f6496d30d085
---> 5657f984ae35
Step 3/5 : EXPOSE 5000
---> Running in 93c58d4b5fc1
Removing intermediate container 93c58d4b5fc1
---> 1a6657883eb9
Step 4/5 : COPY . .
---> 9badab908e55
Step 5/5 : ENTRYPOINT ["dotnet", "k8swebapi.dll", "--urls", "http://*:5000;http://*:5001"]
---> Running in 25a44038e606
Removing intermediate container 25a44038e606
---> 3068b399a9f4
Successfully built 3068b399a9f4
Successfully tagged k8swebapi:latest
When the mirror is built successfully, display Successfully and return the mirror ID 3068b399a9f4
4. Create Container and Start Container
Using docker run
- d stands for Background Running Container
-- rm Specifies that containers are automatically deleted when they are stopped, and that containers are automatically deleted when docker stop contriner is stopped
-- P (upper case) Host host automatically allocates ports and associates with port 5000 exposed by the container, accessing web api services externally using ports automatically allocated by host host
-- name Container name
The last parameter is the mirror name, preceding by [OPTIONS] format: docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
[root@VM_0_12_centos webapipublish]# docker run -d --rm -P --name k8swebapi k8swebapi dd8b01b33183f621d98043fdddbb7fda5817d312b7943a53718d6e6b0b0b94aa
View the created container and the host's automatically assigned port 32770 through docker ps.In-container access to api service port 5000 and out-of-container access to api service port 32770
[root@VM_0_12_centos webapipublish]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES dd8b01b33183 k8swebapi "dotnet k8swebapi.dl..." About an hour ago Up About an hour 0.0.0.0:32770->5000/tcp k8swebapi 3ddee94cef3a ubuntu:latest "/bin/bash" 6 days ago Up 6 days quizzical_nash
5. Enter the container
Enter the k8swebapi container, view the app directory, and request the api service as follows:
[root@VM_0_12_centos webapipublish]# docker exec -it dd8b01b33183 /bin/bash root@dd8b01b33183:/app# ls Dockerfile System.Text.Encodings.Web.dll k8swebapi.Views.pdb Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer.dll System.Text.Json.dll k8swebapi.deps.json Microsoft.AspNetCore.Mvc.Versioning.dll YLYUN.Common.Dapper.dll k8swebapi.dll Microsoft.Bcl.AsyncInterfaces.dll YLYUN.Common.Dapper.pdb k8swebapi.pdb Microsoft.OpenApi.dll YLYUN.Common.Dapper.xml k8swebapi.runtimeconfig.json Swashbuckle.AspNetCore.Swagger.dll appsettings.Development.json web.config Swashbuckle.AspNetCore.SwaggerGen.dll appsettings.json wwwroot Swashbuckle.AspNetCore.SwaggerUI.dll dll System.Runtime.CompilerServices.Unsafe.dll k8swebapi.Views.dll root@dd8b01b33183:/app# curl http://localhost:5000/api/v1/user/IndexList [{"id":1,"name":"Zhang San"},{"id":2,"name":"Li Si"}]root@dd8b01b33183:/app#
6. External access
Access on the host machine as follows:
[root@VM_0_12_centos webapipublish]# curl http://localhost:32770/api/v1/user/IndexList [{"id":1,"name":"Zhang San"},{"id":2,"name":"Li Si"}][root@VM_0_12_centos webapipublish]#
) Accessed externally through a browser on the windows system (where IP is server cloud ip), as follows:
