Cloud: Difference between revisions

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<li>[https://www.youtube.com/watch?v=E3z-T7d2jEI 【甲骨文】云服务器免费注册地址大全！]
<li>[https://www.youtube.com/watch?v=E3z-T7d2jEI 【甲骨文】云服务器免费注册地址大全！]
<li>Be sure to keep SSH keys since there is no way to retrieve it
<li>Be sure to keep SSH keys since there is no way to retrieve it
* For some reason, suddenly I cannot ssh connect to my VM after I installed and ran the calibre docker container.
* On another machine, my ssh connection got kicked out '''client_loop: send disconnect: Broken pipe'''
* The '''console connection''' method still relies on SSH, which doesn't solve your original problem. Unfortunately, Oracle Cloud Infrastructure (OCI) doesn't provide a direct, non-SSH method to access the command line of your VM through the web interface, unlike some other cloud providers.
<li>Hamburger icon on top-left -> Billing and cost management.
<li>Difficult to create VMs: Out of capacity for shape VM.Standard.A1.Flex in availability domain AD-2. Create the instance in a different availability domain or try again later. If you specified a fault domain, try creating the instance without specifying a fault domain, otherwise try creating the instance in a different availability domain. If that doesn’t work, please try again later.
<li>Difficult to create VMs: Out of capacity for shape VM.Standard.A1.Flex in availability domain AD-2. Create the instance in a different availability domain or try again later. If you specified a fault domain, try creating the instance without specifying a fault domain, otherwise try creating the instance in a different availability domain. If that doesn’t work, please try again later.
* [https://www.reddit.com/r/oraclecloud/comments/zf0tje/out_of_capacity_for_shape_vmstandarda1flex/ Out of capacity for shape VM.Standard.A1.Flex]
* [https://www.reddit.com/r/oraclecloud/comments/zf0tje/out_of_capacity_for_shape_vmstandarda1flex/ Out of capacity for shape VM.Standard.A1.Flex]
* Change A1.Flex to A2.Flex will help but A2.Flex is not always free
* Change A1.Flex to A2.Flex will help but A2.Flex is not always free
* '''VM.Standard.E2.1.Micro''' is always available. But we are limited to
** 2 instances.
** RAM = 1GB
** Network bandwidth is .48 rather 1 GB/s.
<li>Linux distribution
* Ubuntu default username: ubuntu (about 240 MB RAM, [https://www.reddit.com/r/oraclecloud/comments/12jueh3/lightest_image_on_ram_for_micro_instances/ Lightest image on RAM for micro instances])
* Rocky linux default username: rocky. Rocky linux is way too heavy and slow on E2.1.Micro. "dnf update" takes long time. Why total memory is 760MB instead of 1GB.
<li>Post installation <BR/>
Fix date/time  (works for Ubuntu & rocky)
<syntaxhighlight lang='sh'>
sudo timedatectl set-timezone America/New_York
</syntaxhighlight>
<li>Open ports
<li>Open ports
* Document [https://docs.oracle.com/en-us/iaas/developer-tutorials/tutorials/apache-on-ubuntu/01oci-ubuntu-apache-summary.htm Free Tier: Install Apache and PHP on an Ubuntu Instance]. Search " Enable Internet Access" and "ingress rule".
* Document [https://docs.oracle.com/en-us/iaas/developer-tutorials/tutorials/apache-on-ubuntu/01oci-ubuntu-apache-summary.htm Free Tier: Install Apache and PHP on an Ubuntu Instance]. Search " Enable Internet Access" and "ingress rule".
* Document [https://docs.oracle.com/en-us/iaas/Content/Network/Concepts/overview.htm Networking Overview] Access to the Internet
* Document [https://docs.oracle.com/en-us/iaas/Content/Network/Concepts/overview.htm Networking Overview] Access to the Internet
* [https://stackoverflow.com/questions/54794217/opening-port-80-on-oracle-cloud-infrastructure-compute-node Opening port 80 on Oracle Cloud Infrastructure Compute node] & the link to [https://medium.com/@fathi.ria/oracle-database-cloud-open-ports-on-oci-1af24f4eb9f2 Oracle Database Cloud — Open Ports on OCI]
* [https://stackoverflow.com/questions/54794217/opening-port-80-on-oracle-cloud-infrastructure-compute-node Opening port 80 on Oracle Cloud Infrastructure Compute node] & the link to [https://medium.com/@fathi.ria/oracle-database-cloud-open-ports-on-oci-1af24f4eb9f2 Oracle Database Cloud — Open Ports on OCI]
* [https://www.reddit.com/r/oraclecloud/comments/r8lkf7/comment/hv4kqyu/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button This works]. Suppose I installed Docker and start a nginx container. Then, Step 1.  
* [https://www.reddit.com/r/oraclecloud/comments/r8lkf7/comment/hv4kqyu/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button This works]. Suppose I installed Docker and start a nginx container. Then, Step 1 ('''seems not needed''').  
<syntaxhighlight lang='sh'>
<pre>
sudo apt install firewalld
sudo apt install firewalld
sudo firewall-cmd --zone=public --permanent --add-port=8080/tcp
sudo firewall-cmd --zone=public --permanent --add-port=8080/tcp
Line 70: Line 89:
sudo firewall-cmd --list-all
sudo firewall-cmd --list-all
sudo firewall-cmd --list-ports  # list open ports
sudo firewall-cmd --list-ports  # list open ports
</syntaxhighlight>
</pre>
Or (not tested).
Or (not tested).
<syntaxhighlight lang='sh'>
<pre>
sudo apt install ufw
sudo apt install ufw
ufw --version
ufw --version
Line 78: Line 97:
sudo ufw allow 80/tcp
sudo ufw allow 80/tcp
sudo ufw status
sudo ufw status
</syntaxhighlight>
</pre>
Step 2. Click on my '''Virtual cloud network''' vcn-2024xxxx-xxxx. Subnets -> '''subnet-2024XXXX-xxxx''' -> Security Lists -> "Default Security List for vcn-2024XXXX-xxxx" -> Ingress Rules -> Add '''Ingress Rules'''. Currently the rules contain port 22. So I just add port 8080.
Step 2. Click on my '''Virtual cloud network''' vcn-2024xxxx-xxxx. Subnets -> '''subnet-2024XXXX-xxxx''' -> Security Lists -> "Default Security List for vcn-2024XXXX-xxxx" -> Ingress Rules -> Add '''Ingress Rules'''. Currently the rules contain port 22. So I just add port 8080.
</ul>
</ul>

Latest revision as of 20:31, 12 November 2024

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  • 【甲骨文】云服务器免费注册地址大全！
  • Be sure to keep SSH keys since there is no way to retrieve it
    • For some reason, suddenly I cannot ssh connect to my VM after I installed and ran the calibre docker container.
    • On another machine, my ssh connection got kicked out client_loop: send disconnect: Broken pipe
    • The console connection method still relies on SSH, which doesn't solve your original problem. Unfortunately, Oracle Cloud Infrastructure (OCI) doesn't provide a direct, non-SSH method to access the command line of your VM through the web interface, unlike some other cloud providers.
  • Hamburger icon on top-left -> Billing and cost management.
  • Difficult to create VMs: Out of capacity for shape VM.Standard.A1.Flex in availability domain AD-2. Create the instance in a different availability domain or try again later. If you specified a fault domain, try creating the instance without specifying a fault domain, otherwise try creating the instance in a different availability domain. If that doesn’t work, please try again later.
    • Out of capacity for shape VM.Standard.A1.Flex
    • Change A1.Flex to A2.Flex will help but A2.Flex is not always free
    • VM.Standard.E2.1.Micro is always available. But we are limited to
      • 2 instances.
      • RAM = 1GB
      • Network bandwidth is .48 rather 1 GB/s.
  • Linux distribution
    • Ubuntu default username: ubuntu (about 240 MB RAM, Lightest image on RAM for micro instances)
    • Rocky linux default username: rocky. Rocky linux is way too heavy and slow on E2.1.Micro. "dnf update" takes long time. Why total memory is 760MB instead of 1GB.
  • Post installation
    Fix date/time (works for Ubuntu & rocky) 
    sudo timedatectl set-timezone America/New_York
  • Open ports 
    sudo apt install firewalld
sudo firewall-cmd --zone=public --permanent --add-port=8080/tcp
# sudo firewall-cmd --zone=public --permanent --remove-port=8080/tcp
sudo firewall-cmd --reload

sudo firewall-cmd --state9
sudo systemctl status firewalld
sudo firewall-cmd --list-all
sudo firewall-cmd --list-ports  # list open ports

    Or (not tested). 

    sudo apt install ufw
ufw --version
sudo ufw enable
sudo ufw allow 80/tcp
sudo ufw status

    Step 2. Click on my Virtual cloud network vcn-2024xxxx-xxxx. Subnets -> subnet-2024XXXX-xxxx -> Security Lists -> "Default Security List for vcn-2024XXXX-xxxx" -> Ingress Rules -> Add Ingress Rules. Currently the rules contain port 22. So I just add port 8080.

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