Cloud Archives - ServerOK

AlibabaCloud DirectMail

March 9, 2020

by ServerOk with No Comment Cloud

AlibabaCloud DirectMail is transactional email service from AlibabaCloud. It is like Amazon SES, MailGun, SendGrid etc…

They have 3 differnt mail server hostname depending on region. Unlike other SMTP providers, they allow email using port 80.

SMTP service address (China East 1): smtpdm.aliyun.com

SMTP service address (Singapore): smtpdm-ap-southeast-1.aliyun.com

SMTP service address (Sydney): smtpdm-ap-southeast-2.aliyun.com

SMTP port: 25, 80, 465 (SSL encrypted).

SMTP service address (China East 1): smtpdm.aliyun.com

SMTP service address (Singapore): smtpdm-ap-southeast-1.aliyun.com

SMTP service address (Sydney): smtpdm-ap-southeast-2.aliyun.com

SMTP port: 25, 80, 465 (SSL encrypted).

Note: Port 25 is currently disabled to maintain ECS security. If your sending application is deployed on Alibaba Cloud ECS, we recommend that you use port 80 when SSL is not checked, and use port 465 when SSL is checked. Besides, we support explict ssl/tls functionality on port 25 or 80 with “STARTTLS” smtp cmd.

Whitelist an IP in Amazon AWS security group from command line

January 15, 2020

by ServerOk with No Comment Cloud

To white list an IP in Amazon AWS security group using aws command line tool, run

aws ec2 authorize-security-group-ingress --group-id SECURITY_GROUP_ID_HERE --protocol tcp --port PORT_HERE --cidr IP_IN_CIDR_HERE

1	aws ec2 authorize-security-group-ingress --group-id SECURITY_GROUP_ID_HERE --protocol tcp --port PORT_HERE --cidr IP_IN_CIDR_HERE

Example

aws ec2 authorize-security-group-ingress --group-id sg-a777eee6  --protocol tcp --port 443 --cidr 94.31.33.128/27

1	aws ec2 authorize-security-group-ingress --group-id sg-a777eee6 --protocol tcp --port 443 --cidr 94.31.33.128/27

AWS Elastic Beanstalk

November 25, 2019

by ServerOk with No Comment Cloud

Here are some useful command working with AWS Elastic Beanstalk

eb init = initialize environment
eb list
eb logs
eb console = open aws console
eb open = open application in web browser
eb appversion = show application versions
eb health = show health of application
eb codesource = select local or codecommit
eb deploy = deploy code
eb events = Gets recent events.
eb create = Creates a new environment.
eb labs download = download application to local computer

eb init = initialize environment

eb list

eb logs

eb console = open aws console

eb open = open application in web browser

eb appversion = show application versions

eb health = show health of application

eb codesource = select local or codecommit

eb deploy = deploy code

eb events = Gets recent events.

eb create = Creates a new environment.

eb labs download = download application to local computer

Application get stored in folder

/var/app/ondeck

1	/var/app/ondeck

Oracle Cloud

November 4, 2019

by ServerOk with No Comment Cloud

Allow ICMP (ping) in Oracle Cloud
Updating Kernel on Oracle Linux with Ksplice

See Cloud

Allow ICMP (ping) in Oracle Cloud

November 4, 2019

by ServerOk with No Comment Cloud

Oracle cloud do not allow ICMP/ping to compute instances. To enable ping, you need to enable ICMP in the security group.

On your compute instance details page, you will see “Virtual Cloud Network”.

Click on Virtual Cloud Network link, that will take you to page with VPC details.

Scroll down, you will see subnet.

Click on Public Subnet, on next page, it shows details about the subnet. Under Security Lists, you will see Default Security List for VirtualCloudNetwork. Click on it to see your firewall rules.

Click Add Ingress Rules button to add new rule. By default port 22 (SSH) allowed from everyone. ICMP was blocked for everyone (rule 2 and 3).

To allow ICMP, you can add a new Rule for ICMP.

On Add Ingress Rules page, select

SOURCE TYPE = CIDR
SOURCE CIDR = 0.0.0.0/0
IP PROTOCOL = ICMP

SOURCE TYPE = CIDR

SOURCE CIDR = 0.0.0.0/0

IP PROTOCOL = ICMP

Click Add Ingress Rules button. Now you should be able to ping to any compute instances on this VPC. It is safe to remove 2 of the existing ICMP rules or edit them instead of adding new rule.

See Oracle Cloud

Connect to Google Cloud SQL

August 10, 2019

by ServerOk with No Comment Cloud

To connect to Google Cloud SQL, run

gcloud sql connect DB_INSTANE_NAME

1	gcloud sql connect DB_INSTANE_NAME

Amazon S3 CORS

July 20, 2019

by ServerOk with No Comment Cloud

To enable CORS for Amazon S3 bucket, add

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  <CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>PUT</AllowedMethod>
    <AllowedMethod>POST</AllowedMethod>
    <AllowedMethod>DELETE</AllowedMethod>
    <MaxAgeSeconds>1800</MaxAgeSeconds>
    <AllowedHeader>*</AllowedHeader>
  </CORSRule>
</CORSConfiguration>

<?xml version="1.0" encoding="UTF-8"?>

<AllowedMethod>DELETE</AllowedMethod>

</CORSRule>

</CORSConfiguration>

Google Cloud App Engine

July 17, 2019

by ServerOk with No Comment Cloud

To list instances in Google Cloud App Engine, run

gcloud app instances list

1	gcloud app instances list

To create an application

gcloud app create

1	gcloud app create

To deploy an application

gcloud app deploy

1	gcloud app deploy

Google Cloud SQL

July 17, 2019

by ServerOk with No Comment Cloud

To create a Google Cloud SQL database, run

gcloud sql instances create INSTANCE_NAME_HERE --activation-policy=ALWAYS --tier=db-n1-standard-1

1	gcloud sql instances create INSTANCE_NAME_HERE --activation-policy=ALWAYS --tier=db-n1-standard-1

INSTANCE_NAME_HERE = this can be anything, lowercase letters, 0-9, for identification purpose only.

db-n1-standard-1 => this is size of the server, you can change it as needed.

To create a Database, run

gcloud sql databases create DB_NAME_HERE --instance INSTANCE_NAME_HERE

1	gcloud sql databases create DB_NAME_HERE --instance INSTANCE_NAME_HERE

To create a User, run

gcloud sql users set-password root --host=%  --instance INSTANCE_NAME_HERE  --password=PASSWORD_HERE

1	gcloud sql users set-password root --host=% --instance INSTANCE_NAME_HERE --password=PASSWORD_HERE

To list all google cloud SQL instances, run

gcloud sql instances list

1	gcloud sql instances list

Google Cloud SQL

To list all databases in a Google Cloud SQL server, run

gcloud sql  databases list --instance INSTANCE_NAME_HERE

1	gcloud sql databases list --instance INSTANCE_NAME_HERE

list databases in google cloud sql

To connect to Google Cloud SQL database, run

gcloud sql connect INSTANCE_NAME_HERE

1	gcloud sql connect INSTANCE_NAME_HERE

This will open firewall rule and add your IP so you can connect to Google Cloud SQL server.

Set Permanant hostname on AWS EC2 CentOS 7 server

March 25, 2019

by ServerOk with No Comment Cloud

On AWS EC2 when you boot, hostname set something like ip-172-31-41-172.eu-central-1.compute.internal

To chaneg this, run

hostnamectl set-hostname --static HOSTNAME_HERE

1	hostnamectl set-hostname --static HOSTNAME_HERE

Example

hostnamectl set-hostname --static server1.serverok.in

1	hostnamectl set-hostname --static server1.serverok.in

To disable change of hostname, run

echo "preserve_hostname: true" > /etc/cloud/cloud.cfg.d/99_hostname.cfg

1	echo "preserve_hostname: true" > /etc/cloud/cloud.cfg.d/99_hostname.cfg

Now reboot your server with

reboot

reboot