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''' No cache in VM. So if we ran out of memory, the machine will be frozen. Need to reboot.
** 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>
== Idle instance reclaim ==
[https://docs.oracle.com/en-us/iaas/Content/FreeTier/freetier_topic-Always_Free_Resources.htm#compute__idleinstances  Always Free Resources]
Idle Always Free compute instances may be reclaimed by Oracle. Oracle will deem virtual machine and bare metal compute instances as idle if, during a 7-day period, the following are true:
* CPU utilization for the 95th percentile is less than 20%
* Network utilization is less than 20%
* Memory utilization is less than 20% (applies to A1 shapes only)


= [https://c9.io/ Cloud9] =
= [https://c9.io/ Cloud9] =

Latest revision as of 15:16, 17 November 2024

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  • it seems we cannot use oneDrive as a backup. If we unselect a folder for syncing, the folder will be immediately removed from the local system.
  • not sure if the syncing is working. I copy a new folder to the local onedrive folder. The oneDrive icon on the top menu keeps rotation but nothing really happened. The new files are not in cloud and the syncing symbol shows files are not synced.

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Oracle cloud

  • https://oracle.com/cloud/
  • 【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 No cache in VM. So if we ran out of memory, the machine will be frozen. Need to reboot.
      • 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.

Idle instance reclaim

Always Free Resources

Idle Always Free compute instances may be reclaimed by Oracle. Oracle will deem virtual machine and bare metal compute instances as idle if, during a 7-day period, the following are true:

  • CPU utilization for the 95th percentile is less than 20%
  • Network utilization is less than 20%
  • Memory utilization is less than 20% (applies to A1 shapes only)

Cloud9

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NextCloud

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Decide a date/schedule a meeting

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