sudo docker cp myfile.txt ccae4670f030:/usr/sharemi茅rcoles, 21 de diciembre de 2022
lunes, 19 de diciembre de 2022
configurar oracledb a SQLAlchemy
python -m pip install oracledb
Then add this to your top level SQLAlchemy 1.4 file:
import sys
import oracledb
oracledb.version = "8.3.0"
sys.modules["cx_Oracle"] = oracledb
martes, 13 de diciembre de 2022
Crear un contenedor con un Dockerfile
docker build -t ubuntu-test:latest . does work.
docker build -t ubuntu-test:latest ./Dockerfile does not work.
crear una imagen de un contenedor
Paso 1: Listamos nuestros contenedores
1 | sudo docker ps |
Los contenedores podr铆an estar o no en ejecuci贸n.
Luego de haber hecho todos los cambios a nuestro contenedor, vamos a crear una imagen.
Paso2: Creado imagen.
1 | sudo docker commit ff357b1f0c66 ubuntuchange |
commit: Comando para crear imagen de docker
ff357b1f0c66: En el ID del contenedor de la cual vamos a crear una imagen
ubuntuchange: Nombre que le damos a la imagen de docker
Paso3: Listamos las imagenes de docker.
Como podemos ver ya tenemos nuestra imagen creada con ID: 074db4b9721f
jueves, 8 de diciembre de 2022
install Docker/Docker Compose/Portainer/Ubuntu Virtual Desktop
ARM es una arquitectura RISC. RISC significa C贸mputo de conjunto de instrucciones reducido. Esto significa que la CPU tiene un n煤mero limitado de instrucciones que puede usar. Como resultado, cada instrucci贸n se ejecuta en un solo ciclo y las instrucciones son m谩s simples. Mientras tanto, x86 es una arquitectura CISC, que significa Computaci贸n de conjunto de instrucciones complejas. ARM est谩 dise帽ado para ser m谩s peque帽o, m谩s eficiente energ茅ticamente y genera menos calor. Un problema es que los programas x86 no pueden ejecutarse en ARM. La mayor铆a de los lenguajes de programaci贸n pueden apuntar a ARM muy bien. Cualquier programa mantenido actualmente deber铆a tener pocos problemas. Sin embargo, todo lo que se escriba en Ensamblaje deber谩 reescribirse para que funcione en ARM. Tambi茅n hay un problema de velocidad. Dado que ARM tiene menos instrucciones, los desarrolladores deben usar m谩s instrucciones.
Para la versi贸n CentOS 8 y Ubuntu 20.04 de la arquitectura x86_64, puede encontrar esta publicaci贸n sobre c贸mo instalar Docker/Docker-Compose:
Choose Oracle Image. Default username is opc
You also can use Ubuntu 20.04 (not minimum) version to use Arm based shape. The installation for docker and docker compose will be a little different, which you can find out from this post (Install Docker, Docker-Compose, Portainer & Nginx on CentOS 8 & Ubuntu 20.04)
System Update
Check System Public IP:
[root@arm1 ~]# curl https://ip.51sec.org/api 132.145.100.226
Update Oracle Linux 8 system to latest:
[root@arm1 ~]# yum upgrade -y && yum update -y
Update Ubuntu system to latest:
[root@arm1 ~]# apt update -y && apt upgrade -y
Install NodeQuery Monitor Sensor
Nodequery stopped the service since Sep 2021. Check other services in my post:
Free Cloud Server Monitoring Services: Netdata, New Relic, Datadog, Instrumental
You will get a one line sensor installation code from NodeQuery add a new server page.
root@opc3arm2ubuntu:~# wget -N --no-check-certificate https://raw.github.com/nodequery/nq-agent/master/nq-install.sh && bash nq-install.sh gRa6yhaYPTkpogsqZRMFy0CMgfmj05
--2021-08-02 13:43:44-- https://raw.github.com/nodequery/nq-agent/master/nq-install.sh
Resolving raw.github.com (raw.github.com)... 185.199.108.133, 185.199.109.133, 185.199.110.133, ...
Connecting to raw.github.com (raw.github.com)|185.199.108.133|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://raw.githubusercontent.com/nodequery/nq-agent/master/nq-install.sh [following]
--2021-08-02 13:43:44-- https://raw.githubusercontent.com/nodequery/nq-agent/master/nq-install.sh
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.109.133, 185.199.110.133, 185.199.111.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.109.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4781 (4.7K) [text/plain]
Saving to: ‘nq-install.sh’
nq-install.sh 100%[===============================================================================================================================>] 4.67K --.-KB/s in 0s
Last-modified header missing -- time-stamps turned off.
2021-08-02 13:43:44 (71.0 MB/s) - ‘nq-install.sh’ saved [4781/4781]
|
| NodeQuery Installer
| ===================
|
| Downloading nq-agent.sh to /etc/nodequery
|
| + 2021-08-02 13:43:45 URL:https://raw.githubusercontent.com/nodequery/nq-agent/master/nq-agent.sh [8537/8537] -> "/etc/nodequery/nq-agent.sh" [1]
|
| Success: The NodeQuery agent has been installed
Install Docker
dnf install -y dnf-utils zip unzip
dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
dnf remove -y runc
dnf install -y docker-ce --nobest
systemctl enable docker.service
systemctl start docker.service
systemctl status docker.service
docker info
docker version
Ubuntu System:
apt install docker.io -y && apt install docker-compose
Install Docker-Compose
yum install -y libffi libffi-devel openssl-devel python3 python3-pip python3-devel
pip3 install docker-compose
ln -s /usr/local/bin/docker-compose /usr/bin/docker-composeInstall Portainer
Commands to install Portainer:
[root@arm1 ~]# docker volume create portainer_data
portainer_data
[root@arm1 ~]# docker run -d -p 9000:9000 --name portainer --restart always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest
If you had Nginx installed and also you
have your own domain, you can configure Nginx to do reverse proxy for
your Portainer using your own domain.
Nginx configuration:
root@4ccb3643b7e4:/etc/nginx/conf.d# cat portainer.conf
server {
listen 80;
server_name opc2armportainer2.51sec.eu.org;
location / {
proxy_pass http://portainer:9000;
proxy_http_version 1.1;
proxy_read_timeout 300;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Real-PORT $remote_port;
}
}
root@4ccb3643b7e4:/etc/nginx/conf.d# Run a Ubuntu 20.04 Desktop
docker run -p 6080:80 fredblgr/ubuntu-novnc:20.04
http://<Public IP>:6080
The docker support basic http password authentication:
docker run -d -p 6080:80 -v $PWD:/workspace:rw -e HTTP_PASSWORD=P@ssword1234 -e RESOLUTION=1680x1050 --name ubuntu-novnc fredblgr/ubuntu-novnc:20.04- Authenticate username is default one: root
- Password is the one you set using environment variable, HTTP_PASSWORD.
Default log in user is root. But you can user variables, user and password to change it.
-e USER=netsec -e PASSWORD=password1234
--rm parameter will remove docker after it stopped.
From Ubuntu terminal, you can install firefox to have a browser for your internet.
User name is root, and password is what we set using "docker run" command.
To install Firefox, here is a command after logged in noVNC.
apt update -y && apt install firefox -y
Unfortunately NPM (Nginx Proxy Manager) does not work
with noVNC. I have to configure NGINX manually with following Nginx
reverse proxy configuration:
root@4ccb3643b7e4:/# cd /etc/nginx/
root@4ccb3643b7e4:/etc/nginx# cd conf.d/
root@4ccb3643b7e4:/etc/nginx/conf.d# cat novnc.conf
server {
listen 80;
server_name novnc.51sec.eu.org;
location / {
proxy_pass http://14.23.12.11:6080;
proxy_http_version 1.1;
proxy_read_timeout 300;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Real-PORT $remote_port;
}
}
root@4ccb3643b7e4:/etc/nginx/conf.d# After this, https://novnc.51sec.eu.org/ works well.
Notes:
1) At present, the entire Oracle region should have arm. Except for popular areas, such as India and Sydney, arm machines are still very good. In addition, Japan and South Korea are in hell mode.
2) When terminating the server, be sure to pay attention to whether the boot volume is also terminated together!
3) The opened server currently does not have the [Always Free] logo, but there is a boot volume!
4) For a new account (without the trial period), the ARM server will be stopped after the trial period expires, and your arm will be released after about 60 days. You need to re-open the arm to release it, and your machine will be stable after activation.
5) As for dd, it is not recommended, the title is very risky, but there may also be metaphysical factors in it.
6) Bill query, if you are worried about the non-free content you have opened, you can check it if you have incurred a fee!
https://cloud.oracle.com/usage/reports
7) Free resources are 3,000 OCPU hours + 18,000GB memory usage per month. Regardless of charging and trial users, there are so many free resources. Converted to 4+24, it is about 750 hours, and it should be no problem to play for a month.
8) The previous ordinary machine is still limited to 2 permanent free machines, this has not changed.
9) Your permanent free resources are still network traffic of 10TB per month, total disk quota space of 200G , a total of 4 IPV4 addresses (*3 temporary + 1 reserved), and the IPV6 address is the number of /16. That is to say, you can open 6 machines, and finally two use pure IPV6.
10) Regarding the size of the boot volume, because the default is 45G, if you think it is too small, you can modify the size online, but the premise is that your 200G has not been used up by you. How to modify it, click on the block storage boot volume,
Troubleshooting
Issue 1: Your Firefox profile cannot be loaded. It may be missing or inaccessible
Duplicate Docker and Re-deploy it.
Other noVNC docker image
HTTP Base Authentication
This image provides base access authentication of HTTP via HTTP_PASSWORD
docker run -p 6080:80 -e HTTP_PASSWORD=mypassword -v /dev/shm:/dev/shm dorowu/ubuntu-desktop-lxde-vnc- If you are using ARM-based linux, the docker image will be "dorowu/ubuntu-desktop-lxde-vnc:focal-arm64". The whole command will be:
docker run -p 6080:80 -e HTTP_PASSWORD=P@ssword1234 -v /dev/shm:/dev/shm dorowu/ubuntu-desktop-lxde-vnc:focal-arm64
Further detail about docker "dorowu/ubuntu-desktop-lxde-vnc" can be found from this URL
- https://hub.docker.com/r/dorowu/ubuntu-desktop-lxde-vnc
It is also possible to enable sound support in this docker image but I tested it and it does not work well with ARM based machine
s谩bado, 1 de octubre de 2022
Ejecutar Jupyterhub en docker - Agregar Usuario Inicial
Abra una segunda consola y ejecute
docker container ls
para ver los contenedores existentes y sus ids. Entonces corre
docker exec -it $containerid$ bash
Para mostrar una consola bash. (Los primeros caracteres de la identificaci贸n del contenedor jupyterhub son suficientes para identificarlo)
Para crear un nuevo usuario de Linux:
useradd $username$
passwd $username$
Luego se le pedir谩 la contrase帽a.
Adem谩s, ejecute el siguiente comando dentro del contenedor:
pip install notebook
De lo contrario, el servidor de desove no funciona, consulte tambi茅n:
https://stackoverflow.com/questions/56441563/jupyterhub-spawn-error-first-installation
Luego, puede iniciar sesi贸n con las credenciales de inicio de sesi贸n reci茅n creadas.
lunes, 19 de septiembre de 2022
Solucionar Flutter [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: HandshakeException: Handshake error in client (OS Error: E/flutter ( 4857): CERTIFICATE_VERIFY_FAILED: Hostname mismatch(handshake.cc:393))
it is work on both platform (android & ios)
class MyHttpOverrides extends HttpOverrides{
@override
HttpClient createHttpClient(SecurityContext context){
return super.createHttpClient(context)
..badCertificateCallback = (X509Certificate cert, String host, int port)=> true;
}
}
void main(){
HttpOverrides.global = new MyHttpOverrides();
runApp(new MyApp());
}
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