When you start a docker container you can specify environment settings like what port to listen on https and http, see example below:
docker run -p 5000:5000 -p 5001:5000 -e ASPNETCORE_HTTPS_PORT=https://+:5001
-e ASPNETCORE_URLS=http://+:5000 --name aspnetcore_sample aspnetappDocker adding all new containers default to a bridge network but on the default bridge network you only can communicate between containers with ip-address, to communicate with containers name instead you need to define your own bridge network:
docker network create --driver bridge network01 --subnet=10.11.0.0/16Then when you run the container add –network network01 to let the container connect to the new network and you can then communicate between containers by using the name you set on the container instead of communicate by ip-address that changes after a reboot and other things.
If you not specify any network on a container Docker seems to use a bridged wish gives it a own virtual ip-address in a virtual network where all containers are in.
You can get the ip-address by using this command on the docker server:
docker inspect <container_id> | grep IPAddressReference: https://www.tutorialworks.com/container-networking/
I have started to learn Docker and a nice one liner to have saved somewhere is this one that setting up a docker container with MS SQL server and a SA password + setting up a docker volume to hold the data for MS SQL Server.
The one-line:
docker run -e 'ACCEPT_EULA=Y' -e 'MSSQL_SA_PASSWORD=<YourStrong@Passw0rd>' -p 1433:1433 -v sqlvolume:/var/opt/mssql --name sql1 --hostname sql1 -d mcr.microsoft.com/mssql/server:2019-latest
Reference information can be found on https://learn.microsoft.com/en-us/sql/linux/quickstart-install-connect-docker
How To Configure Static IP On CentOS 6
=======================================
## Configure eth0
#
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=”eth0″
NM_CONTROLLED=”yes”
ONBOOT=yes
HWADDR=A4:BA:DB:37:F1:04
TYPE=Ethernet
BOOTPROTO=static
NAME=”System eth0″
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
IPADDR=192.168.1.44
NETMASK=255.255.255.0
## Configure Default Gateway
#
# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=centos6
GATEWAY=192.168.1.1
## Restart Network Interface
#
/etc/init.d/network restart
## Configure DNS Server
#
# vi /etc/resolv.conf
nameserver 8.8.8.8 # Replace with your nameserver ip
nameserver 192.168.1.1 # Replace with your nameserver ip
If you like to setup Wifi on your Raspberry Pi without a monitor you can after write the image to the SD card.
On my Windows machine after running Raspberry Pi Imager i needed to remove the sd card and add it again to the usb port to see the drive named boot.
In that drive you create a text file named wpa_supplicant.conf and adding this lines in it:
country=US # Your 2-digit country code
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
network={
ssid=”YOUR_NETWORK_NAME”
psk=”YOUR_PASSWORD”
key_mgmt=WPA-PSK
}
After saved this file with your SSID and password for your Wifi this should connect on first boot to your network.
If you running a Raspberry Pi Zero Wireless you can only connect to a 2.4Ghz network, so you know. The normal ones seems to have 5Ghz but not sure from what version.
If you forgot your Windows 10 Offline user password you can reset the password by using a windows 10 installation USB stick and some simple hacks.
Good to know is that all the users encrypted saved passwords being reseted so you going to be needed to login again on all applications.
Start with setup a Windows 10 installation USB-memorystick so you can boot on it.
Boot on the USB and when the first prompt for the Windows installation shows, where you select langauge and keyboard layout and time and currcency format press SHIFT + F10 to open a command prompt.
Now we need to replace utilman.exe with cmd.exe, before you do this, you should make acopy of utilman.exe so that you can restore it later. Note that you can only restore this file if you boot again from the Windows DVD. Windows 10 is usually installed on drive D: if you boot from a DVD. You can verify this with “dir d:\windows\system32\utilman.exe.” If the system can’t find utilman.exe, try other drive letters.
move d:\windows\system32\utilman.exe d:\windows\system32\utilman.exe.bakcopy d:\windows\system32\cmd.exe d:\windows\system32\utilman.exewpeutil rebootnet user <username> <password>I was looking into how to make a small cost wifi temperature sensor and i find WeMos D1 mini Pro as a very little arduino with wifi on it.
So i buy two of them + two 1-wire temperature sensors DS18S20 and starting read about and after a while testing i got the temperature sensor to work.
The code i used to get the temperature sensor values was:#include <OneWire.h>
// OneWire DS18S20, DS18B20, DS1822 Temperature Example
OneWire ds(D4); // on pin D4 (a 4.7K resistor is necessary)
void setup(void)
{
Serial.begin(9600);
}
void loop(void)
{
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];
float celsius, fahrenheit;
if ( !ds.search(addr))
{
ds.reset_search();
delay(250);
return;
}
if (OneWire::crc8(addr, 7) != addr[7])
{
Serial.println("CRC is not valid!");
return;
}
Serial.println();
// the first ROM byte indicates which chip
switch (addr[0])
{
case 0x10:
type_s = 1;
break;
case 0x28:
type_s = 0;
break;
case 0x22:
type_s = 0;
break;
default:
Serial.println("Device is not a DS18x20 family device.");
return;
}
ds.reset();
ds.select(addr);
ds.write(0x44, 1); // start conversion, with parasite power on at the end
delay(1000);
present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for ( i = 0; i < 9; i++)
{
data[i] = ds.read();
}
// Convert the data to actual temperature
int16_t raw = (data[1] << 8) | data[0];
if (type_s) {
raw = raw << 3; // 9 bit resolution default
if (data[7] == 0x10)
{
raw = (raw & 0xFFF0) + 12 - data[6];
}
}
else
{
byte cfg = (data[4] & 0x60);
if (cfg == 0x00) raw = raw & ~7; // 9 bit resolution, 93.75 ms
else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
}
celsius = (float)raw / 16.0;
Serial.print(" Temperature = ");
Serial.print(celsius);
Serial.print(" Celsius ");
}
So when i was setup a Raspberry Pi on a TV to show a webpage i find that Raspbian haved some kind of timeout that was making the TV to go dark after 10 minutes.
After a while searching i find that there is differents way to fix this in differnt versions but i run Raspbian Buster in the beginning of february 2020 and i tested a lot of things before i got it to not be black screen after 10 minutes.
To fix this you need to edit the file named /etc/xdg/lxsession/LXDE-pi/autostart with your chose of text editor and i change it to look like:
@lxpanel --profile LXDE-pi@pcmanfm --desktop --profile LXDE-pi@xset s noblank@xset -dpms s off
The two first lines is default lines to get the desktop to start but the last two is to disable the black screen that shows up after 10 minutes.
In the default file there is a line about xscreensaver that i removed.
Reboot the Raspberry Pi and wait and now i should not be black screen anymore.
A client was like to show some images on a TV and i try to find a good solution with Raspberry Pi and after tested some i selected to go with setup a Raspberry Pi with Raspbian open up a Chromium webbrowser in fullscreen mode on startup.
This sounds easy but there was a couple of things i find out on the way to get a stable and working version of this project.
The webpage i built my self and not going to include in this post i only whant to write down what i find around Raspbian and the setup to get all stable.
Here is the different steps to setup Raspbian right:
I used a Raspberry Pi 3 B+ with built in wifi but to get it up on the wifi without any keyboard i configure the wifi setup on the SD-Card.
Read my old post about this here.
Read my old post about this here.
The non-lite version of Raspbian comes with quite a few things that are not needed for a Kiosk-style display which bloat the install.
They can be removed, after which an autoremove will take care of any dangling dependencies:sudo apt-get remove --purge wolfram-engine scratch nuscratch sonic-pi idle3 smartsim java-common minecraft-pi python-minecraftpi python3-minecraftpi libreoffice python3-thonny geany claws-mail bluej greenfoot
sudo apt-get autoremove
Run this commands to make sure your raspbian is up-to-date:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
We need chromium-browser as well as unclutter (to hide the cursor).
sudo apt-get install unclutter chromium-browser
Change the file ~/.config/lxsession/LXDE-pi/autostart to look like:.
@lxpanel --profile LXDE-pi@pcmanfm --desktop --profile LXDE-pi@xset s noblank@xset -dpms s off
@sed -i 's/"exited_cleanly": false/"exited_cleanly": true/' ~/.config/chromium-browser Default/Preferences@chromium-browser --noerrdialogs --kiosk http://www.google.com --incognito --disable-translate
The first 2 lines is to get the desktop to start.
The 3th and 4th line is to disable black screen after 10 minutes
The 5th line is to ensures chromium thinks it shut down cleaning, even if it didn’t to prevent tab restore warnings.
The 6th line is to start the chromium webbrowser and to set wish URL Chromium should show.
I write in the beginning of this post that i dont going to get in to the page i was showing but there is a tip i like to give, i was getting a “Translate page”-dialog everytime i rebooted the Raspberry Pi.
The only way i find that worked for me was to add a meta tag in the html code to disable it:
<meta name="google" content="notranslate">
Now you have a working Raspberry Pi that on startup shows a website in chromium full screen (kiosk mode).
Reboot the raspberry pi and let it run.