sskaje's blog, study & research on technology
手机拍照的时候，EXIF里会带上Orientation的标记，一般的看图工具能很好地处理拍照方向，但是照片直接用于图像识别就麻烦了，不是所有工具都会认这个EXIF信息。使用手机拍照构建图像学习数据集的时候，务必要让图片正确旋转，否则标注的信息或者识别到的位置都可能会是错的。
使用 jhead http://www.sentex.net/~mwandel/jhead/usage.html
jhead -autorot xxx.jpgNot really a switch, but similar. If you want to exchange data from two network using a host on Internet, this post helps.
In this case, Router 1 want to use Router 2 as gateway for some destinations. All 3 Nodes here have Internet public IP address.
I set-up a network, 192.168.20.0/24, using WireGuard. Our work are all on the Server in the middle.
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[Interface] Address = 192.168.20.100/24 PrivateKey = KEY ListenPort = 51820 [Peer] PublicKey = RT1PUBKEY AllowedIPs = 192.168.20.200/32,192.168.10.0/24 Endpoint = RT1:51820 [Peer] PublicKey = RT2PUBKEY AllowedIPs = 0.0.0.0/0 Endpoint = RT2:51820 |
If I put such config to /etc/wireguard/wg0.conf and run wg-quick up wg0, then I may lost connection to the server, because of the default route.
Now, add a route table to your system and change wg0.conf, let’s name it wgswitch and table id 201.
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# if you're not on Ubuntu, echo "201 wgswitch" >> /etc/iproute2/rt_tables echo "201 wgswitch" >> /etc/iproute2/rt_tables.d/wg_switch.conf |
Then modify wg0.conf.
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[Interface] Address = 192.168.20.100/24 PrivateKey = KEY ListenPort = 51820 Table = 201 |
Now when you establish connections, you’ll be able to ping from router1 to router2 using 192.168.20.0/24 network.
But if you want to try a custom network, that’s not enough, you need extra route and ip rule for your network
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# PostUp /sbin/ip route add ROUTE_TO_ROUTER1/16 via LOCAL_GW dev eth0 table 230 /sbin/ip route add ROUTE_TO_ROUTER2/16 via LOCAL_GW dev eth0 table 230 /sbin/ip route add LOCAL_INTERFACE_IP/24 dev eth0 table 230 /sbin/ip route add 192.168.10.0/24 dev wg0 /sbin/ip rule add iif wg0 lookup 201 /bin/ping -c 1 192.168.201.1 /bin/ping -c 1 192.168.201.20 |
AppStore only, you need a macOS < 10.15 to download this installer
https://itunes.apple.com/cn/app/macos-catalina/id1466841314?ls=1&mt=12
AppStore only, you need a macOS < 10.14 to download this installer
https://apps.apple.com/cn/app/macos-mojave/id1398502828?mt=12
AppStore only, you need a macOS < 10.13 to download this installer
https://apps.apple.com/cn/app/macos-high-sierra/id1246284741?ls=1&mt=12
10.9 Mavericks or earlier
Idk
Docker Desktop for Windows reports incompatible with Windows Server 2019 Essentials.
Logs indicates that hyper-v is required.
Here is a bat enabling all hyper-v related feature on Windows.
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pushd "%~dp0" dir /b %SystemRoot%\servicing\Packages\*Hyper-V*.mum >hyper-v.txt for /f %%i in ('findstr /i . hyper-v.txt 2^>nul') do dism /online /norestart /add-package:"%SystemRoot%\servicing\Packages\%%i" del hyper-v.txt Dism /online /enable-feature /featurename:Microsoft-Hyper-V -All /LimitAccess /ALL pause |
Also, Container
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pushd "%~dp0" dir /b %SystemRoot%\servicing\Packages\*containers*.mum >containers.txt for /f %%i in ('findstr /i . containers.txt 2^>nul') do dism /online /norestart /add-package:"%SystemRoot%\servicing\Packages\%%i" del containers.txt Dism /online /enable-feature /featurename:Containers -All /LimitAccess /ALL pause |
But I tried Docker EE on Windows Server 2019 Essentials, still not working.
https://forums.docker.com/t/installing-docker-on-windows-10-home/11722/25
以前自己用 strongswan 等软件配 IPSec site-to-site 的时候，可以直接指定客户端的 IP 是 0.0.0.0，Azure 的 site-to-site IPSec VPN 必须要指定客户端 IP。
PowerShell 爱好者可以参考 https://www.hayesjupe.com/using-azure-rm-site-to-site-vpn-with-a-dynamic-ip/ 这篇文章。
我还是习惯用 Linux，于是使用 Azure CLI 来解决这个问题。
在 VPN 的 Virtual Network 里放置一台 Linux 虚拟机。按照上述连接里的说明安装软件。接下来开始操作。
SSH 登录虚拟机后，执行命令，并按照输出，用浏览器登录 Azure 账号，完成认证。
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$ az login To sign in, use a web browser to open the page https://microsoft.com/devicelogin and enter the code XXXXXXX to authenticate. |
如果是中国区 Azure，先需要设置服务器
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$ az cloud set -n AzureChinaCloud Switched active cloud to 'AzureChinaCloud'. Use 'az login' to log in to this cloud. Use 'az account set' to set the active subscription. |
如果需要切换回海外版本
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$ az cloud set -n AzureCloud |
参考 DDNS 的玩法，让客户端定期更新IP。服务端可以简单地将数据记录到数据库、文件、或者任何地方，配置一个 cron 来执行更新检测和 Gateway IP 更新。
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# 更新 IP $ az network local-gateway update -g RGNAME -n GWNAME --gateway-ip-address IP.ADD.RE.SS # 查看 Gateway $ az network local-gateway list -g RGNAME |
这里会有个问题，如果源 IP 和新 IP 相同，update 可能会出一个莫名其妙的404 错误。
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Operation failed with status: 'Not Found'. Details: 404 Client Error: Not Found for url: https://management.chinacloudapi.cn/subscriptions/SUBSCRIPTION_ID/providers/Microsoft.Network/locations/chinanorth/operations/OPERATION_ID?api-version=2019-04-01 |
看了眼 –verbose –debug 的输出，这个 update 命令先发送了一条命令到服务端，然后轮询等待任务更新。可能这个任务服务端直接判定不需要执行，所以返回的 operation id 无效。