ServerLess学习笔记-搭建FnProject示例
初始化函数目录
# 初始化 fn_demo1
[root@VM-24-9-centos serverless]# fn init --runtime python fn_demo1
Creating function at: ./fn_demo1
Unable to get latest FDK version, using default
Function boilerplate generated.
func.yaml created.
# 初始化 fn_demo2
[root@VM-24-9-centos serverless]# fn init --runtime python fn_demo2
Creating function at: ./fn_demo2
Function boilerplate generated.
func.yaml created.
创建应用
[root@VM-24-9-centos serverless]# fn create app fn_app
Successfully created app: fn_app
修改函数代码
下面为函数
fn_demo1的修改，fn_demo2参考fn_demo1进行修改
[root@VM-24-9-centos serverless]# cd fn_demo1/
[root@VM-24-9-centos fn_demo1]# ls
func.py func.yaml requirements.txt
[root@VM-24-9-centos fn_demo1]# ll
total 12
-rw-r--r-- 1 root root 576 Oct 20 17:09 func.py
-rw-r--r-- 1 root root 207 Oct 20 17:10 func.yaml
-rw-r--r-- 1 root root 3 Oct 20 17:10 requirements.txt
# 修改func.py
[root@VM-24-9-centos fn_demo1]# vi func.py
import io
import json
import logging
from fdk import response
def handler(ctx, data: io.BytesIO = None):
name = "fn_demo1" # 将此处的World修改为fn_demo1方便测试调用后的展示结果
try:
body = json.loads(data.getvalue())
name = body.get("name")
except (Exception, ValueError) as ex:
logging.getLogger().info('error parsing json payload: ' + str(ex))
logging.getLogger().info("Inside Python Hello World function")
return response.Response(
ctx, response_data=json.dumps(
{"message": "Hello {0}".format(name)}),
headers={"Content-Type": "application/json"}
func.yaml配置文件字段详解
```
schema_version: 20180708 #标识此函数文件的架构版本
name: fn_demo1 #函数的名称。与目录名称匹配
version: 0.0.1 #版本号：从 0.0.1 自动开始
runtime: python #运行时设置的语言环境
entrypoint: /python/bin/fdk /function/func.py handler #调用函数时要调用的可执行文件的名称
memory: 256 #函数的最大内存大小，单位：MB
```
部署应用/函数
将函数
fn_demo1和fn_demo2分别与fn_app关联并部署,部署fn_demo2与fn_demo1步骤一致
# 进入函数目录
[root@VM-24-9-centos serverless]# cd fn_demo1/
# 部署函数
[root@VM-24-9-centos fn_demo1]# fn --verbose deploy --app fn_app --local
Deploying fn_demo1 to app: fn_app
Bumped to version 0.0.4
Using Container engine docker
Building image fn_demo1:0.0.4
Dockerfile content
-----------------------------------
FROM fnproject/python:3.9-dev as build-stage
WORKDIR /function
ADD requirements.txt /function/
RUN pip3 install --target /python/ --no-cache --no-cache-dir -r requirements.txt &&\
rm -fr ~/.cache/pip /tmp* requirements.txt func.yaml Dockerfile .venv &&\
chmod -R o+r /python
ADD . /function/
RUN rm -fr /function/.pip_cache
FROM fnproject/python:3.9
WORKDIR /function
COPY --from=build-stage /python /python
COPY --from=build-stage /function /function
RUN chmod -R o+r /function
ENV PYTHONPATH=/function:/python
ENTRYPOINT ["/python/bin/fdk", "/function/func.py", "handler"]
-----------------------------------
FN_REGISTRY: FN_REGISTRY is not set.
Current Context: default
[+] Building 120.6s (17/17) FINISHED
=> [internal] load build definition from Dockerfile2218814693 0.0s
=> => transferring dockerfile: 643B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/fnproject/python:3.9 0.7s
=> [internal] load metadata for docker.io/fnproject/python:3.9-dev 0.8s
=> [build-stage 1/6] FROM docker.io/fnproject/python:3.9-dev@sha256:2a257fac48519801b646c7217b151049bfaa29e75c0d8cdd9469e6db86a45adc 0.0s
=> [stage-1 1/5] FROM docker.io/fnproject/python:3.9@sha256:8af5441307d08e86b79b46675050cb4b98b251bd980b32fc58764702710399ab 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 952B 0.0s
=> CACHED [build-stage 2/6] WORKDIR /function 0.0s
=> CACHED [build-stage 3/6] ADD requirements.txt /function/ 0.0s
=> [build-stage 4/6] RUN pip3 install --target /python/ --no-cache --no-cache-dir -r requirements.txt && rm -fr ~/.cache/pip /tmp* requi 118.8s
=> [build-stage 5/6] ADD . /function/ 0.0s
=> [build-stage 6/6] RUN rm -fr /function/.pip_cache 0.2s
=> CACHED [stage-1 2/5] WORKDIR /function 0.0s
=> [stage-1 3/5] COPY --from=build-stage /python /python 0.1s
=> [stage-1 4/5] COPY --from=build-stage /function /function 0.1s
=> [stage-1 5/5] RUN chmod -R o+r /function 0.2s
=> exporting to image 0.1s
=> => exporting layers 0.1s
=> => writing image sha256:5700ac5e7fc00f10b9c812292283184c25be858c8cf537e9b15d1d3dec80ef96 0.0s
=> => naming to docker.io/library/fn_demo1:0.0.1 0.0s
Updating function fn_demo1 using image fn_demo1:0.0.1...
查看生成的服务镜像
[root@VM-24-9-centos fn_demo2]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
fn_demo2 0.0.2 82a9bc7b0f7f 59 seconds ago 174MB
fn_demo1 0.0.4 5700ac5e7fc0 2 minutes ago 174MB
获取函数信息
查看
fn_demo1的信息
[root@VM-24-9-centos serverless]# ./fn inspect function fn_app fn_demo1
{
"annotations": {
"fnproject.io/fn/invokeEndpoint": "http://localhost:8080/invoke/01HD66V4V6NG8G00RZJ000000H" # 函数的调用地址
},
"app_id": "01HD65NGGGNG8G00RZJ000000G",
"created_at": "2023-10-20T09:32:11.494Z",
"id": "01HD66V4V6NG8G00RZJ000000H",
"idle_timeout": 30,
"image": "fn_demo1:0.0.4",
"memory": 256,
"name": "fn_demo1",
"timeout": 30,
"updated_at": "2023-10-20T09:32:11.494Z"
}
调用函数
通过fn调用函数
[root@VM-24-9-centos serverless]# fn invoke fn_app fn_demo1
{"message": "Hello fn_demo1"}
[root@VM-24-9-centos serverless]# fn invoke fn_app fn_demo2
{"message": "Hello fn_demo2"}
通过Curl调用函数
[root@VM-24-9-centos serverless]# curl -X "POST" -H "Content-Type: application/json" -d '{"name":"fn_demo1"}' http://localhost:8080/invoke/01HD66V4V6NG8G00RZJ000000H
{"message": "Hello fn_demo1"}
[root@VM-24-9-centos serverless]# curl -X "POST" -H "Content-Type: application/json" -d '{"name":"fn_demo2"}' http://localhost:8080/invoke/01HD66XF41NG8G00RZJ000000J
{"message": "Hello fn_demo2"}