部署 harbor 私有仓库
安装下载依赖包
安装docker-compose
从 docker compose 发布页面下载最新的 docker-compose 二进制文件,本文以1.25.4为例
cd /opt/k8s/work/harbor/ wget https://github.com/docker/compose/releases/download/1.25.4/docker-compose-Linux-x86_64 mv docker-compose-Linux-x86_64 /opt/k8s/bin/docker-compose
chmod a+x /opt/k8s/bin/docker-compose
export PATH=/opt/k8s/bin:$PATH下载harbor二进制文件
从 harbor 发布页面下载最新的 harbor 离线安装包，本文以v1.9.4为例
cd /opt/k8s/work/harbor/ wget https://github.com/goharbor/harbor/releases/download/v1.9.4/harbor-offline-installer-v1.9.4.tgz tar -xzvf harbor-offline-installer-v1.5.1.tgz导入 docker images
导入离线安装包中 harbor 相关的 docker imagescd /opt/k8s/work/harbor/harbor
docker load -i harbor.v1.9.4.tar.gz
以http形式启动
修改harbor.yml文件
修改 hostname、data_volume属性值cd /opt/k8s/work/harbor/harbor cp harbor.yml harbor.yml.bak vim harbor.yml修改信息如下
diff harbor.yml harbor.yml.bak
5c5
< hostname: 192.168.0.107
---
> hostname: reg.mydomain.com
40c40
< data_volume: /data/k8s/harbor/data
---
> data_volume: /data加载和启动 harbor 镜像
cd /opt/k8s/work/harbor/harbor
mkdir -p /data/k8s/harbor/data
chmod 777 /var/run/docker.sock /data/k8s/harbor/data
./install.sh启动日志
Note: docker version: 18.09.6 Note: docker-compose version: 1.25.4
# Configuration file of Harbor [Step 1]: loading Harbor images ...
Loaded image: goharbor/harbor-core:v1.9.4
Loaded image: goharbor/clair-photon:v2.1.0-v1.9.4
Loaded image: goharbor/harbor-portal:v1.9.4
Loaded image: goharbor/nginx-photon:v1.9.4
Loaded image: goharbor/chartmuseum-photon:v0.9.0-v1.9.4
Loaded image: goharbor/prepare:v1.9.4
Loaded image: goharbor/redis-photon:v1.9.4
Loaded image: goharbor/registry-photon:v2.7.1-patch-2819-2553-v1.9.4
Loaded image: goharbor/notary-server-photon:v0.6.1-v1.9.4
Loaded image: goharbor/harbor-log:v1.9.4
Loaded image: goharbor/harbor-db:v1.9.4
Loaded image: goharbor/harbor-jobservice:v1.9.4
Loaded image: goharbor/harbor-registryctl:v1.9.4
Loaded image: goharbor/notary-signer-photon:v0.6.1-v1.9.4
Loaded image: goharbor/harbor-migrator:v1.9.4 [Step 2]: preparing environment ...
prepare base dir is set to /opt/k8s/work/harbor/harbor
Generated configuration file: /config/log/logrotate.conf
Generated configuration file: /config/log/rsyslog_docker.conf
Generated configuration file: /config/nginx/nginx.conf
Generated configuration file: /config/core/env
Generated configuration file: /config/core/app.conf
Generated configuration file: /config/registry/config.yml
Generated configuration file: /config/registryctl/env
Generated configuration file: /config/db/env
Generated configuration file: /config/jobservice/env
Generated configuration file: /config/jobservice/config.yml
Generated and saved secret to file: /secret/keys/secretkey
Generated certificate, key file: /secret/core/private_key.pem, cert file: /secret/registry/root.crt
Generated configuration file: /compose_location/docker-compose.yml
Clean up the input dir [Step 3]: starting Harbor ...
Creating network "harbor_harbor" with the default driver
Creating harbor-log ... done
Creating harbor-db ... done
Creating redis ... done
Creating harbor-portal ... done
Creating registry ... done
Creating registryctl ... done
Creating harbor-core ... done
Creating harbor-jobservice ... done
Creating nginx ... done ✔ ----Harbor has been installed and started successfully.---- Now you should be able to visit the admin portal at http://192.168.0.107.
For more details, please visit https://github.com/goharbor/harbor .查看启动状态
root@master:/opt/k8s/work/harbor/harbor# docker-compose ps
Name Command State Ports
---------------------------------------------------------------------------------------------
harbor-core /harbor/harbor_core Up (healthy)
harbor-db /docker-entrypoint.sh Up (healthy) 5432/tcp
harbor-jobservice /harbor/harbor_jobservice ... Up (healthy)
harbor-log /bin/sh -c /usr/local/bin/ ... Up (healthy) 127.0.0.1:1514->10514/tcp
harbor-portal nginx -g daemon off; Up (healthy) 8080/tcp
nginx nginx -g daemon off; Up (healthy) 0.0.0.0:80->8080/tcp
redis redis-server /etc/redis.conf Up (healthy) 6379/tcp
registry /entrypoint.sh /etc/regist ... Up (healthy) 5000/tcp
registryctl /harbor/start.sh Up (healthy)如果有不是healthy状态的对象，到/var/log/harbor/目录下查看对应对象的日志
harbor官方提供的启动文件中容器的日志类型是syslog，不支持用docker logs查看
ls /var/log/harbor/
core.log jobservice.log portal.log postgresql.log proxy.log redis.log registryctl.log registry.log
```
浏览器访问 http://192.168.0.107,用账号 admin 和 harbor.yml 配置文件中的默认密码 Harbor12345 登陆系统。
创建一个新的项目
docker命令拉取和上传镜像
执行login
root@slave:~# docker login -u admin -p Harbor12345 192.168.0.107
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Error response from daemon: Get https://192.168.0.107/v2/: dial tcp 192.168.0.107:443: connect: connection refused因为docker命令默认采用https和API交互，而我们的harbor是http的，所以不能执行，需要在/etc/docker/daemon.json中追加insecure-registries配置
{
"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn","https://hub-mirror.c.163.com"],
"insecure-registries": ["192.168.0.107"],
"max-concurrent-downloads": 20,
"live-restore": true,
"max-concurrent-uploads": 10,
"data-root": "/data/k8s/docker/data",
"log-opts": {
"max-size": "100m",
"max-file": "5"
}
}重新启动docker服务
root@slave:~# systemctl restart docker root@slave:~# docker login -u admin -p Harbor12345 192.168.0.107
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded向harbor中刚创建的私有项目里面上传镜像
root@slave:~# docker tag k8s.gcr.io/pause:3.1 192.168.0.107/k8s/pause:3.1
root@slave:~# docker push 192.168.0.107/k8s/pause:3.1
The push refers to repository [192.168.0.107/k8s/pause]
e17133b79956: Pushed
3.1: digest: sha256:fcaff905397ba63fd376d0c3019f1f1cb6e7506131389edbcb3d22719f1ae54d size: 527浏览器查看
从harbor中下载镜像
root@slave:~# docker rmi 192.168.0.107/k8s/pause:3.1
Untagged: 192.168.0.107/k8s/pause:3.1
Untagged: 192.168.0.107/k8s/pause@sha256:fcaff905397ba63fd376d0c3019f1f1cb6e7506131389edbcb3d22719f1ae54d
root@slave:~# docker pull 192.168.0.107/k8s/pause:3.1
3.1: Pulling from k8s/pause
Digest: sha256:fcaff905397ba63fd376d0c3019f1f1cb6e7506131389edbcb3d22719f1ae54d
Status: Downloaded newer image for 192.168.0.107/k8s/pause:3.1
以https形式启动
下列操作的工作目录/opt/k8s/work/harbor/harbor是解压harbor离线安装文件后 生成的 harbor 目录
停止harbor（如果没有启动过，则跳过该步骤）
cd /opt/k8s/work/harbor/harbor root@master:/opt/k8s/work/harbor/harbor# COMPOSE_HTTP_TIMEOUT=200 docker-compose down -v
Stopping nginx ... done
Stopping harbor-jobservice ... done
Stopping harbor-core ... done
Stopping registryctl ... done
Stopping redis ... done
Stopping harbor-portal ... done
Stopping harbor-db ... done
Stopping registry ... done
Stopping harbor-log ... done
Removing harbor-log ... done
Removing network harbor_harbor执行docker-compose down -v后，有可能对应的容器还在，可以执行强制停掉容器
docker ps | grep harbor | awk '{print $1}' | xargs -I {} docker rm -f {}
创建 harbor nginx 服务器使用的 x509 证书，本文档采用cfssl工具生成，也可以利用openssl生成，具体步骤参考harbor-openssl
创建harbor用的CA根证书
创建配置文件
cd /opt/k8s/work/harbor/
cat > harbor-ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"harbor": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "87600h"
}
}
}
}
EOF创建证书签名请求文件
cd /opt/k8s/work/harbor/ cat > harbor-ca-csr.json <<EOF
{
"CN": "harbor-ca",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "NanJing",
"L": "NanJing",
"O": "k8s",
"OU": "system"
}
],
"ca": {
"expiry": "87600h"
}
}
EOF生成自签名的根证书,分发证书
cd /opt/k8s/work/harbor/ cfssl gencert -initca harbor-ca-csr.json | cfssljson -bare harbor-ca ls harbor-ca*pem mkdir -p /etc/harbor/cert mv harbor-ca*pem harbor-ca-config.json /etc/harbor/cert
创建harbor用的证书
生成证书请求文件
cd /opt/k8s/work/harbor/ cat > harbor-server-csr.json <<EOF
{
"CN": "harbor",
"hosts": [
"127.0.0.1",
"192.168.0.107"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "NanJing",
"L": "NanJing",
"O": "k8s",
"OU": "system"
}
]
}
EOF- hosts 字段指定授权使用该证书的当前部署节点 IP
生成证书
cfssl gencert -ca=/etc/harbor/cert/harbor-ca.pem \
-ca-key=/etc/harbor/cert/harbor-ca-key.pem
-config=/etc/harbor/cert/harbor-ca-config.json
-profile=harbor harbor-server-csr.json | cfssljson -bare harbor-server
ls harbor-server*pem
mv harbor-server*pem /etc/harbor/cert
```
编辑配置文件
修改 hostname、data_volume属性值,去除默认的http方式，追加https的配置
cd /opt/k8s/work/harbor/harbor vim harbor.yml修改内容如下
diff harbor.yml harbor.yml.bak
5c5
< hostname: 192.168.0.107
---
> hostname: reg.mydomain.com
8c8
< #http:
---
> http:
10c10
< # port: 80
---
> port: 80
13c13
< https:
---
> # https:
15c15
< port: 443
---
> # port: 443
17,18c17,18
< certificate: /etc/harbor/cert/harbor-server.pem
< private_key: /etc/harbor/cert/harbor-server-key.pem
---
> # certificate: /your/certificate/path
> # private_key: /your/private/key/path
40c40
< data_volume: /data/k8s/harbor/data
---
> data_volume: /data生成配置文件（如果没有启动过，则跳过该步骤）
cd /opt/k8s/work/harbor/harbor ./prepare执行日志
prepare base dir is set to /opt/k8s/work/harbor/harbor
Clearing the configuration file: /config/log/rsyslog_docker.conf
Clearing the configuration file: /config/log/logrotate.conf
Clearing the configuration file: /config/jobservice/config.yml
Clearing the configuration file: /config/jobservice/env
Clearing the configuration file: /config/db/env
Clearing the configuration file: /config/registryctl/config.yml
Clearing the configuration file: /config/registryctl/env
Clearing the configuration file: /config/nginx/nginx.conf
Clearing the configuration file: /config/registry/config.yml
Clearing the configuration file: /config/registry/root.crt
Clearing the configuration file: /config/core/app.conf
Clearing the configuration file: /config/core/env
Generated configuration file: /config/log/logrotate.conf
Generated configuration file: /config/log/rsyslog_docker.conf
Generated configuration file: /config/nginx/nginx.conf
Generated configuration file: /config/core/env
Generated configuration file: /config/core/app.conf
Generated configuration file: /config/registry/config.yml
Generated configuration file: /config/registryctl/env
Generated configuration file: /config/db/env
Generated configuration file: /config/jobservice/env
Generated configuration file: /config/jobservice/config.yml
loaded secret from file: /secret/keys/secretkey
Generated configuration file: /compose_location/docker-compose.yml
Clean up the input dir修改生成文件的访问权限
cd /opt/k8s/work/harbor/harbor
chmod -R 777 common启动harbor
如果是首次启动 执行
cd /opt/k8s/work/harbor/harbor mkdir -p /data/k8s/harbor/data
chmod 777 /var/run/docker.sock /data/k8s/harbor/data
./install.sh否则执行
docker-compose up -d查看启动状态
root@master:/opt/k8s/work/harbor/harbor# docker-compose ps
Name Command State Ports
---------------------------------------------------------------------------------------------------------------
harbor-core /harbor/harbor_core Up (healthy)
harbor-db /docker-entrypoint.sh Up (healthy) 5432/tcp
harbor-jobservice /harbor/harbor_jobservice ... Up (healthy)
harbor-log /bin/sh -c /usr/local/bin/ ... Up (healthy) 127.0.0.1:1514->10514/tcp
harbor-portal nginx -g daemon off; Up (healthy) 8080/tcp
nginx nginx -g daemon off; Up (healthy) 0.0.0.0:80->8080/tcp, 0.0.0.0:443->8443/tcp
redis redis-server /etc/redis.conf Up (healthy) 6379/tcp
registry /entrypoint.sh /etc/regist ... Up (healthy) 5000/tcp
registryctl /harbor/start.sh Up (healthy)- nginx 暴露了两个端口http的80和https的443，使用http访问80会自动重定向到https
浏览器访问 https://192.168.0.107,用账号 admin 和 harbor.yml 配置文件中的默认密码 Harbor12345 登陆系统。
- 其中的k8s是在http模式下创建的项目，直接启动https的可参照上面创建
docker命令拉取和上传镜像
如果之前已经执行过docker login，配置修改后需要重新docker login，需要删除 /root/.docker/config.json文件
如果在/etc/docker/daemon.json中配置过insecure-registries，需要去掉,并重新启动docker服务
执行login
root@slave:~# docker login -u admin -p Harbor12345 192.168.0.107
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Error response from daemon: Get https://192.168.0.107/v2/: x509: certificate signed by unknown authority
```
错误是说我们用的证书是自签名的证书，签发证书机构未经认证
解决方法是将签署 harbor-server 证书的 CA 证书拷贝到 /etc/docker/certs.d/192.168.0.107 目录下（需要在所有要访问harbor的节点上都执行此操作）
```
root@slave:~# mkdir -p /etc/docker/certs.d/192.168.0.107
root@slave:~# scp root@192.168.0.107:/etc/harbor/cert/harbor-ca.pem /etc/docker/certs.d/192.168.0.107/ca.crt
root@192.168.0.107's password:
harbor-ca.pem 100% 1306 283.7KB/s 00:00
root@slave:~# ls /etc/docker/certs.d/192.168.0.107/
ca.crt
```
重新执行login
```
root@slave:~# docker login -u admin -p Harbor12345 192.168.0.107
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
```
上传镜像
root@slave:~# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
kubernetesui/metrics-scraper v1.0.3 3327f0dbcb4a 2 weeks ago 40.1MB
busybox latest 6d5fcfe5ff17 7 weeks ago 1.22MB
coredns/coredns 1.6.6 cc4d8e8c6169 2 months ago 40.8MB
k8s.gcr.io/pause 3.1 da86e6ba6ca1 2 years ago 742kB
192.168.0.107/k8s/pause 3.1 da86e6ba6ca1 2 years ago 742kB
kubeimage/pause 3.1 da86e6ba6ca1 2 years ago 742kB
nginx 1.9.1 94ec7e53edfc 4 years ago 133MB
root@slave:~# docker tag busybox:latest 192.168.0.107/k8s/busybox:latest
root@slave:~# docker push 192.168.0.107/k8s/busybox:latest
The push refers to repository [192.168.0.107/k8s/busybox]
195be5f8be1d: Pushed
latest: digest: sha256:edafc0a0fb057813850d1ba44014914ca02d671ae247107ca70c94db686e7de6 size: 527
通过浏览器查看刚上传的镜像
从harbor下载镜像
root@slave:~# docker rmi 192.168.0.107/k8s/busybox:latest
Untagged: 192.168.0.107/k8s/busybox:latest
Untagged: 192.168.0.107/k8s/busybox@sha256:edafc0a0fb057813850d1ba44014914ca02d671ae247107ca70c94db686e7de6
root@slave:~# docker pull 192.168.0.107/k8s/busybox:latest
latest: Pulling from k8s/busybox
Digest: sha256:edafc0a0fb057813850d1ba44014914ca02d671ae247107ca70c94db686e7de6
Status: Downloaded newer image for 192.168.0.107/k8s/busybox:latest
kubernetes集群中使用私有的harbor镜像仓库
kubelet配置
kubernetes以pod为管理单元，而不是docker容器，在创建pod时，会先启动一个名为k8s.gcr.io/pause:3.1的镜像。
该镜像存在于google的镜像仓库中，国内不能直接访问，需要翻墙下载，如果集群新加节点，或者节点上这个镜像被清理掉，将导致pod不能启动
一般做法是搭建私有镜像仓库，把这个镜像push到我们的私有镜像仓库，再配置kubelet使用我们私有仓库中的pause镜像
具体做法是修改kubelet服务的启动文件:/etc/systemd/system/kubelet.service,在其中追加--pod-infra-container-image属性，属性值指向自己私有仓库中的pause镜像
例如
--pod-infra-container-image=192.168.0.107/k8s/pause:3.1重启kubelet服务
systemctl restart kubeletkubernetes和harbor进行认证
kubernetes提供了各种方式来访问各种镜像仓库，具体参考Using a Private Registry,本文采用配置节点的方式来使用私有仓库
在集群的任意一个节点上登陆harbor
root@slave:~# docker login -u admin -p Harbor12345 192.168.0.107
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded成功后会生成认证文件/root/.docker/config.json
root@slave:~# ls /root/.docker/
config.json
root@slave:~# cat /root/.docker/config.json
{
"auths": {
"192.168.0.107": {
"auth": "YWRtaW46SGFyYm9yMTIzNDU="
}
},
"HttpHeaders": {
"User-Agent": "Docker-Client/18.09.6 (linux)"
}
}配置kubelet使用此认证文件
默认情况下，kubelet会从如下路径中查找私有仓库的认证文件
- {--root-dir:-/var/lib/kubelet}/config.json
- {cwd of kubelet}/config.json
- ${HOME}/.docker/config.json #须在环境变量文件中为 kubelet 显式设置 HOME=/root
- /.docker/config.json
此处我们将私有仓库的认证文件copy到kubelet的root目录下，此目录在kubelet.service中进行设置
例如--root-dir=/data/k8s/k8s/kubeletcopy私有仓库的认证文件到kubelet的root目录（所有运行kubelet，需要访问harbor的节点都需要），本环境中有两个节点
cp /root/.docker/config.json /data/k8s/k8s/kubelet/config.json scp /root/.docker/config.json root@192.168.0.114:/data/k8s/k8s/kubelet/config.json
验证
创建一个pod,image 指定私有仓库里面的镜像
cd /opt/k8s/yml cat > private-busybox.yml << EOF
apiVersion: v1
kind: Pod
metadata:
name: private-busybox
spec:
containers:
- name: private-busybox
image: 192.168.0.107/k8s/busybox:latest
command:
- sleep
- "3600"
EOF创建pod
root@master:/opt/k8s/yml# kubectl create -f private-busybox.yml查看运行状态
root@master:/opt/k8s/yml# kubectl get pod | grep private-busybox
private-busybox 1/1 Running 0 108s通过docker命令，查看启动pod对应的容器的镜像名称
root@master:/opt/k8s/yml# docker ps | grep -e IMAGE -e private-busybox
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c2b43d9d9b3e 192.168.0.107/k8s/busybox "sleep 3600" About a minute ago Up About a minute k8s_private-busybox_private-busybox_default_98a4d4bd-fd46-4d9d-8ef9-95845ce7e53d_0
a4a84461d5fe 192.168.0.107/k8s/pause:3.1 "/pause" About a minute ago Up About a minute k8s_POD_private-busybox_default_98a4d4bd-fd46-4d9d-8ef9-95845ce7e53d_0 1/1 Running 0 5s可以看到启动的容器对应的镜像都是我们自己的私有仓库中的镜像
部署 harbor 私有仓库的更多相关文章
- 部署Harbor私有镜像仓库
Harbor私有镜像仓库无坑搭建 目录 1. harbor介绍 2. docker-ce的安装 3. docker-compose的安装 4. Harbor私有仓库的安装 5. 客户端连接镜像仓库配置 ...
- Docker Harbor私有仓库部署与管理 (超详细配图)
Docker Harbor私有仓库部署与管理 1.Harbor 介绍 2.Harbor部署 3.Harbor管理 1.Harbor 介绍: 什么是 Harbor ? Harbor 是 VMware 公 ...
- 搭建harbor私有仓库
2-1.项目说明 Harbor是一个用于存储和分发Docker镜像的企业级Registry服务器,由VMware开源,其通过添加一些企业必需的功能特性,例如安全.标识和管理等,扩展了开源 Docke ...
- Harbor私有仓库中如何彻底删除镜像释放存储空间？
简介: Harbor私有仓库运行一段时间后,仓库中存有大量镜像,会占用太多的存储空间.直接通过Harbor界面删除相关镜像,并不会自动删除存储中的文件和镜像.需要停止Harbor服务,执行垃圾回收命令 ...
- 部署docker-registry私有仓库
部署docker-registry私有仓库 创建文件夹 sudo mkdir -p /var/docker-data/{registry,certs,auth} sudo openssl req ...
- Docker以http访问Harbor私有仓库(一)
1 说明 前文Centos7搭建Harbor私有仓库(一)我们成功搭建Harbor,本篇我们主要配置Docker以http方式访问私有仓库 2 Docker配置 2.1 Mac系统 2.1.1 配置D ...
- Docker以https访问Harbor私有仓库(二)
1 说明 前文Centos7搭建Harbor私有仓库(二)中,我们以https方式搭建了Harbor,本篇我们主要配置Docker以https方式访问Harbor私有仓库 2 Docker配置 2.1 ...
- Centos7搭建Harbor私有仓库(二)
1 说明 前文Centos7搭建Harbor私有仓库(一)中成功搭建了Harbor,但,是以http方式搭建的,这里我们修改为https方式 以下基于镜像CentOS-7-x86_64-Minimal ...
- 在jenkins中使用shell命令推送当前主机上的docker镜像到远程的Harbor私有仓库
1.jenkins主机上的docker配置 先在Jenkins主机的docke上配置上Harbor私有仓库地址 cat /etc/docker/daemon.json { "insecure ...
随机推荐
- 2020年我国到底有多少程序员？现在学习java还来得及吗？
中国有多少程序员?现在还值得学java吗? 跪求关注,祝关注我的人都:身体健康,财源广进,福如东海,寿比南山,早上贵子,从不掉发! JAVA起于1995年,经过20多年的发展,JAVA如今已经发展成为 ...
- samba服务器红帽5.4搭建，亲测可用！！！
samba服务器搭建 服务器的环境 红帽5.4 vm15 挂载光盘 mount mount -t iso9660 设备目录 /mnt 表示挂载 软件包安装 samba服务器只需安装两个软件包,先找到软 ...
- docker练习-容器和服务
使用定义容器 Dockerfile Dockerfile定义容器内环境中发生的事情.对网络接口和磁盘驱动器等资源的访问在此环境中进行虚拟化,该环境与系统的其他部分隔离,因此您需要将端口映射到外部世界, ...
- Pandas常用方法手册
关键缩写和包导入 在这个速查手册中,我们使用如下缩写: df:任意的Pandas DataFrame对象 同时我们需要做如下的引入: import pandas as pd 导入数据 pd.read_ ...
- JS中的splice方法
JS中的splice方法 定义和用法 splice() 方法向/从数组中添加/删除项目,然后返回被删除的项目. 注释:该方法会改变原始数组(集合). 语法 arrayObject.splice(ind ...
- Sql Server学习笔记
1.指定路径创建数据库 create database student on--创建库的时候必须写 ( name=student, filename='E:\database\student.mdf' ...
- C#调用JS的WebService的方法返回null
连上了别人的VPN后,使用WebService测试软件测试了一下,结果正常,但是当我在vs里面添加WebService服务,调用的时候就出现了问题,问题如下图: 后来问了一下服务端那边的同事,他们说服 ...
- js对象转换为json格式时，js对象属性中有值为null和undefined注意事项
当属性值为null时: 当属性值为undefined时: 只有当属性值为未定义时, js对象转换成json格式时会忽略该属性.
- border 边框
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8&quo ...
- Java单体应用 - 开发工具 - 01.IntelliJ IDEA
原文地址:http://www.work100.net/training/monolithic-tools-intellij-idea.html 更多教程:光束云 - 免费课程 IntelliJ ID ...