I have been stuck trying to figure out why my Cloud SQL VM is refusing my connection from my machine (whom ip address I have added as a subnet). I cann SSH into the VM but i cannot access the VM from a browser to make SQLs. I have scoured the internet for days trying to find a fix but i cannot seem to get pass this point. My apache listens to port 80. Also Id like to add that I have been connecting to my Mysql db for months through php and making sqls so I do not believe the problem is with apache. However if it is please point me to where i should be looking.
It sounds like you have MySQL running on a GCE VM, not an actual CloudSQL instance (that is a different service from GCE). Is that right?
If so, then if you are trying to connect from your local machine directly to the mysql instance, you are probably getting blocked by the firewall. Go to the networks tab (under Compute Engine) on the cloud console and see what firewall rules you have enabled. You might need to add one for 3306 or whatever port you are using.
Related
This is my first attempt at deploying a Node.js application on a Google VM instance while connecting to MongoDB.
In MongoDB, I have whitelisted my IP address and the VM instance's IP address. When I start my server using Google Cloud Shell, I receive the following error:
op.cb(new error_1.MongoNetworkError(`connection ${this.id} to ${this.address} closed`));
^
MongoNetworkError: connection 1 to 34.71.95.215:27017 closed
I'm connecting on port 8080. The external IP is listed on my GCP instance page and when I ping it, it is up. IP: 34.68.254.120
When I whitelist 0.0.0.0/0 in Mongodb, the code runs successfully, and I can preview my app through GCP.
I created a new instance from scratch, and it also crashes with the same error.
ETA: In looking at the source code around the error message at:
...\node_modules\mongoose\node_modules\mongodb\lib\cmap\connection.js
it looks like a closed connection. The error message above spits out the IP address as the Iowa Google Data Center where my VM is housed.
I don't know what this means, but if you do, please let me know.
ETA2: I have 2 problems, and they may be connected. The first is that my VM server cannot connect to MongoDB. This should be simple -- whitelist the external IP address of my VM server. It does not work (I have to open MongoDB to 0.0.0.0/0 for it to connect).
The second is that I cannot connect to my server via the external IP address, regardless of whether MongoDB is connected or not. It "refuses to connect." I can do a web preview of my running server, though.
It seems the two may be connected somehow. I've rebooted my VM, but it did not fix anything. I whitelisted the error message IP address in MongoDB, but it did not help.
ETA3: Okay, it appears I have solved the whitelist to MongoDB issues. Through Cloud Shell, I asked my VM what the IP is. It is different than the one GCP tells me is the external IP. By adding this IP to the whitelist, I can connect between GCP VM and MongoDB. Whew. No idea why.
The VM's external IP address through my browser still gives me a cannot connect message, and when I use the new VM IP address I found through Cloud Shell, it gives me a "took too long to respond" message.
So I feel I have made progress. The remaining problem is accessing my server through Chrome.
Any suggestions on how I can investigate the issue further? I'm at a dead end. I believe the problem is likely simple given my inexperience.
Thanks!
Problem solved by a friend, for anyone in the future with this issue.
I had set up my GCP VM using Cloud Shell. I had housed my code by coping my repository through Cloud Shell. It turns out, this is more of a virtual interface with my VM, and the files are not physically on my VM. I needed to go through SSH, clone my repository there, and run my server through SSH. Cloud Shell was causing the problem.
I'd like to know in detail how to connect google compute engine virtual machine instance and app engine.
I've set up a virtual machine instance on Google compute engine, and my Postgres server is running there, following this tutorial: https://cloud.google.com/community/tutorials/setting-up-postgres
I've deployed my flask app under the same project on Google Cloud Platform, creating an app engine instance.
I searched on how to connect compute engine and app engine together, and it seems it should be possible through a VPC connector: connect Google App Engine and Google Compute Engine
This is what my VPC connector looks like:
Serverless VPC access
Name Network Region IP address range Min. throughput Max. throughput
connector-name default europe-west2 10.8.0.0/28 200 300
On my compute engine, I have my VM instance like so:
Name Zone Internal IP External IP
some-name europe-west2-c 10.154.0.2 (nic0) 34.89.113.193
On my flask app, I'm trying to connect to my remote DB like so:
db = PostgresqlExtDatabase(
"some-name", # databse name
user="postgres",
password="some-password",
host="10.154.0.2", # remote host internal ip
port=5432,
)
db.connect()
This is my app.yaml for the vpc access part, I've followed this reference: https://cloud.google.com/appengine/docs/standard/python/connecting-vpc#configuring
vpc_access_connector:
name: projects/some-name/locations/europe-west2/connectors/connector-name
If I understood correctly, if the VPC connector is present, I should just be able to connect using the internal IP address of my VM instance(this case, 10.154.0.2)?
The problem is, when the app is deployed for production, It is still complaining that it cannot connect:
2020-09-26 12:54:51 default[20200926t134815] Is the server running on host "10.154.0.2" and accepting
2020-09-26 12:54:51 default[20200926t134815] TCP/IP connections on port 5432?
If it's connected internally I assume I don't have to add that internal IP to firewall rules, although I did try that as well. As for firewall rules, I have allowed my local machine's IP address so I can connect to the remote Postgres server via PgAdmin.
I've actually tried External IP(34.89.113.193) as well although that doesn't make sense to me.
I'm a bit of a noob on networks and backend stuff in general, any help would be much appreciated.
UPDATED 1
This is my firewall rules:
Direction
Ingress, Egress
Action on match
Allow
Source filters
IP ranges
92.40.176.9/32
78.146.103.141/32
10.154.0.2
Protocols and ports
tcp:5432
Image for reference: Screenshot for the list of firewall rules
It turns out the firewall / postgres configurations were all ok, but because this VPC connector method was on beta, I needed to run:
gcloud beta app deploy
instead of the usual
gcloud app deploy.
This command then updated gcloud Beta Commands and prompted me to enable API:
API [appengine.googleapis.com] not enabled on project [742932836941]. Would you like to enable and retry (this will take a few minutes)? (y/N)?
After enabling this everything worked fine.
Per the information provided seems like both VPC firewall rules and the connector are well configured.
However, based on the messages
2020-09-26 12:54:51 default[20200926t134815] Is the server running on host "10.154.0.2" and accepting
2020-09-26 12:54:51 default[20200926t134815] TCP/IP connections on port 5432?
Seems like the VM or server using 10.154.0.2 is not accepting requests on port 5432 or the port has not been opened, you can use this site to do a port scan.
Based on the guide you followed to create PostgreSQL you are using Ubuntu as OS, therefore I suggest you open the port in ubuntu and see if the issue persists.
I'm trying to connect to Google Cloud SQL from my machine (Ubuntu) using this command:
mysql --host='Public IP' --user='' --password
However, I'm getting this error:
ERROR 2003 (HY000): Can't connect to MySQL server on 'Public IP' (110)
I need any help resolving my issue.
First you need to let the Cloud SQL instance which IP addresses it can accept. You can do that without SSL by following the instructions here. However, to be more secure, I would recommend you using SSL. More info on that here.
Probably the easiest way to securely connect from your local machine to a public ip of a cloud SQL instance is to download and use the proxy, following the instructions here:
https://cloud.google.com/sql/docs/mysql/connect-admin-proxy
What you have to do is add a network to the public ip section, under the connections tab after selecting your Cloud SQL instance.
See Cloud SQL Connections Tab here
So, for the name input you put firstname-lastname kind of thing to denote whose ip it is. Then input your IP address 1.2.3.4/32 into the network input.
After doing so and saving you will be able to connect.
Yes, you can add SSL and use certificates. That is all best practice and what should be done for a production stack. But if this is just getting off the ground and in rapid development, that's all you need to do in the beginning.
I cannot connect to my Google Cloud SQL database from my Macbook Pro using MySQL Workbench.
I have read the help file here:
https://cloud.google.com/sql/docs/mysql/admin-tools
I have added an authorized IP address for my IP per
https://cloud.google.com/sql/docs/mysql/configure-ip#add
I created a user for the database with it set to allow to connect from any host. I get the error "Can't connect to MySQL server on 'XX.XXX.XX.XXX' (60)
I have also attempted to telnet and get a consistent error that I am unable to connect to the remote host
As far as I know, I've followed all the steps but it really seems I'm getting blocked even before the server. I am trying to connect from home and I don't believe my home firewall is blocking things. I am wondering if there's something I need to open up on the GCE firewall but I have successfully connected to this database from other outside tools (e.g., Zapier).
Your best action right now would be to create a proxy with public IP address.
https://cloud.google.com/sql/docs/mysql/connect-external-app
This link will walk you through that process. If this doesn’t solve your issue, then taking your question to ServerFault (Stackoverflow sister site) might give you a better idea of how to fix your issue.
I would like to do my study practice.
To install the multiservers seperating on multiple vm -web server in first vm ,app server in second and db server in the last vm .then,I will create my own webpage to test about accessing data in db .Each of vm is based on VMware in my computer and just do it on localhost environment.not need to connect internet.
How can I do this or Where can I find any Tutorial .Plese give me some suggestion to finish my project ^^"
Thank u very muchh
Just like what you do in physical machines. And IMHO, your question is too general and has nothing to do with virtual machines. I think what you are looking for is how to setup a web server and how to use a database. Why not check the sites such as nginx or apache and mysql or postgresql ?
First of all you need to run all the machines and connected with each other.
By doing this you'll get IP addresses of those machines..
Now simply replace your IP addresses with localhost according to server
Note that every machine must have an appropriate server