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Dec 23 2022

Implementing Cache control headers in Nginx and Apache

Filed under Fixes, Linux, Simple about IT

Cache-Control are HTTP cache headers that holds instructions for caching for requests and responses. It is used to defines how a resource is cached, where it’s cached and its maximum age before expiring. When you visit a website, your browser will save images and website data in a store called the cache. When you revisit the same website again, cache-control sets the rules that determine whether your resources loaded from your local cache or if the browser should send a request to the server for fresh resources.

For better understanding of how the browser renders pages quickly using the cache, you need to know about browser caching and HTTP headers. Continue reading

apache, cache, nginx
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Nov 08 2022

.htaccess: Option FollowSymLinks not allowed here

Filed under Fixes, Linux, Simple about IT

I moved from mod_php to fcgi style hosting and got the following in Apache error log when I tried to open one of my websites:

[Tue Nov 08 08:34:08.357359 2022] [core:alert] [pid 19149] [client 95.158.43.63:14405] /home/domain.com/public_html/.htaccess: Option All not allowed here

[Tue Nov 08 08:35:58.058962 2022] [core:alert] [pid 14190] [client 95.158.43.63:46366] /home/domain.com/public_html/.htaccess: Option FollowSymlinks not allowed here

apache, error, htaccess
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Oct 28 2022

Git Error cloning remote repo code 128 early eof

Filed under Fixes

In case you cannot clone your repository even in shallow mode it means that more memory is needed for git to fetch the files. The git output is similar to:

ERROR: Timeout after 10 minutes
ERROR: Error cloning remote repo 'origin'
git fetch --tags --progress --depth=1 -- git@bitbucket.org:username/repo.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: remote: Enumerating objects: 13045, done.        
remote: Counting objects:   0% (1/13045)        
remote: Counting objects:   1% (131/13045) 
...
Receiving objects:  98% (12804/13045), 360.22 MiB | 635.00 KiB/s   
Receiving objects:  98% (12804/13045), 360.95 MiB | 643.00 KiB/s   
fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed

ERROR: Timeout after 10 minutes

ERROR: Error cloning remote repo 'origin'

git fetch --tags --progress --depth=1 -- git@bitbucket.org:username/repo.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:

stdout:

stderr: remote: Enumerating objects: 13045, done.

remote: Counting objects: 0% (1/13045)

remote: Counting objects: 1% (131/13045)

...

Receiving objects: 98% (12804/13045), 360.22 MiB | 635.00 KiB/s

Receiving objects: 98% (12804/13045), 360.95 MiB | 643.00 KiB/s

fatal: The remote end hung up unexpectedly

fatal: early EOF

fatal: index-pack failed

Again we see the same

fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed Continue reading

error, Git
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Aug 31 2022

mysqldump directly to another server, mysqldump redirect to scp

Filed under Linux

It’s not a big deal to perform mysqldump command, get your database as a file and transfer MySQL database to another server by moving the file to another server and import it,

But what if there is no enough space on a disk to store the dump file? In this case it would be great to create MySQL dump file directly on the remote server. And not only you can create dump file directly but even clone a database to remote MySQL! Here I show how to do this.

Aug 26 2022

key type ssh-rsa not in pubkey accepted algorithms

Filed under Fixes, Linux

I was running Ubuntu 20.04 happily, and then over the weekend decided to back everything up and install 22.04. I installed my previous keys but I couldn’t login via MobaXTerm remotely as I usually did with 20.04.

I logged in with a console and checked /var/log/auth.log . Here are the messages generated upon my tries to log in:

userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth]
Aug 26 06:37:05 ip-172-31-27-21 sshd[1750502]: error: Received disconnect from 209.158.53.89 port 9085:14: No supported authentication methods available [preauth]
Aug 26 06:37:05 ip-172-31-27-21 sshd[1750502]: Disconnected from authenticating user ubuntu 209.158.53.89 port 9085 [preauth]

userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth]

Aug 26 06:37:05 ip-172-31-27-21 sshd[1750502]: error: Received disconnect from 209.158.53.89 port 9085:14: No supported authentication methods available [preauth]

Aug 26 06:37:05 ip-172-31-27-21 sshd[1750502]: Disconnected from authenticating user ubuntu 209.158.53.89 port 9085 [preauth]

error, ssh, Ubuntu
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Aug 12 2022

Jenkins: The remote end hung up unexpectedly fatal: early EOF fatal: index-pack failed

Filed under Fixes

Again the same git error: The remote end hung up unexpectedly fatal: early EOF fatal: index-pack failed.

This time – during the execution of Jenkins pipeline:

ssh_dispatch_run_fatal: Connection to 104.10.141.1 port 22: message authentication code incorrect
fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
warning: unable to unlink '(NULL)': Invalid argument

	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2681)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2102)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$500(CliGitAPIImpl.java:86)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:624)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$2.execute(CliGitAPIImpl.java:853)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:160)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:153)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:375)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:73)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:118)
	at java.lang.Thread.run(Unknown Source)
	Suppressed: hudson.remoting.Channel$CallSiteStackTrace: Remote call to JNLP4-connect connection from 192.168.2.90/192.168.2.90:477
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1784)
		at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
		at hudson.remoting.Channel.call(Channel.java:1000)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)
		at jdk.internal.reflect.GeneratedMethodAccessor1213.invoke(Unknown Source)
		at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.base/java.lang.reflect.Method.invoke(Method.java:566)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)
		at com.sun.proxy.$Proxy76.execute(Unknown Source)
		at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1224)
		at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1302)
		at hudson.scm.SCM.checkout(SCM.java:540)
		at hudson.model.AbstractProject.checkout(AbstractProject.java:1217)
		at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:647)
		at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:85)
		at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:519)
		at hudson.model.Run.execute(Run.java:1897)
		at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
		at hudson.model.ResourceController.execute(ResourceController.java:101)
		at hudson.model.Executor.run(Executor.java:442)
ERROR: Error cloning remote repo 'origin'
Finished: FAILURE

ssh_dispatch_run_fatal: Connection to 104.10.141.1 port 22: message authentication code incorrect

fatal: the remote end hung up unexpectedly

fatal: early EOF

fatal: index-pack failed

warning: unable to unlink '(NULL)': Invalid argument

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2681)

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2102)

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$500(CliGitAPIImpl.java:86)

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:624)

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$2.execute(CliGitAPIImpl.java:853)

at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:160)

at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:153)

at hudson.remoting.UserRequest.perform(UserRequest.java:211)

at hudson.remoting.UserRequest.perform(UserRequest.java:54)

at hudson.remoting.Request$2.run(Request.java:375)

at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:73)

at java.util.concurrent.FutureTask.run(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:118)

at java.lang.Thread.run(Unknown Source)

Suppressed: hudson.remoting.Channel$CallSiteStackTrace: Remote call to JNLP4-connect connection from 192.168.2.90/192.168.2.90:477

at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1784)

at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)

at hudson.remoting.Channel.call(Channel.java:1000)

at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)

at jdk.internal.reflect.GeneratedMethodAccessor1213.invoke(Unknown Source)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:566)

at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)

at com.sun.proxy.$Proxy76.execute(Unknown Source)

at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1224)

at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1302)

at hudson.scm.SCM.checkout(SCM.java:540)

at hudson.model.AbstractProject.checkout(AbstractProject.java:1217)

at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:647)

at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:85)

at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:519)

at hudson.model.Run.execute(Run.java:1897)

at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)

at hudson.model.ResourceController.execute(ResourceController.java:101)

at hudson.model.Executor.run(Executor.java:442)

ERROR: Error cloning remote repo 'origin'

Finished: FAILURE

error, Git, Jenkins
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Jul 29 2022

Using GotoIfTime with Timezones in Asterisk

Filed under Asterisk, Linux, VoIP

Starting from Asterisk 1.6 GotoIfTime application supports Timezone parameter:

[Syntax]
GotoIfTime(times,weekdays,mdays,months[,timezone]?[labeliftrue][:labeliffalse])

I setup a system that receives calls from people in different timezones so I need to use Timezone parameter in GotoIfTime Asterisk application. Surprisingly I could not find examples on Asterisk’s website so I had to search for some.

There can be two possible formats: you can specify timezone as a shift relative to the time the Asterisk operates in, or you can specify as a path to respective timezone file. Here are the examples: Continue reading

Jul 17 2022

Auto-renew Letsencrypt certificates in Azure Automation Account with managed identity

Filed under DevOps, Microsoft

Recently my Job for renewing Letsencrypt certificates in KeyVault has stopped working. Upon closer look I found that my Run As account certificate expired:

I navigated to certificate’s properties to renew it as described in Microsoft documentation and thouhgt I have 1 minute work to fix that but no! There is no option to renew it anymore!

ACME, Azure, letsencrypt, Powershell
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Apr 11 2022

CentOS7 dockerError while creating filesystem xfs on device docker exit status 1

Filed under Fixes, Linux

When you try to start docker it exits with exit status 1.

[root@localhost ~]# systemctl start docker
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.
[root@localhost ~]# systemctl status -l docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since 四 2020-05-14 11:02:36 CST; 5s ago
     Docs: https://docs.docker.com
  Process: 6732 ExecStart=/usr/bin/dockerd (code=exited, status=1/FAILURE)
 Main PID: 6732 (code=exited, status=1/FAILURE)

5月 14 11:02:36 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
5月 14 11:02:36 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service failed.
5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service holdoff time over, scheduling restart.
5月 14 11:02:36 localhost.localdomain systemd[1]: Stopped Docker Application Container Engine.
5月 14 11:02:36 localhost.localdomain systemd[1]: start request repeated too quickly for docker.service
5月 14 11:02:36 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
5月 14 11:02:36 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service failed.

[root@localhost ~]# systemctl start docker

Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

[root@localhost ~]# systemctl status -l docker

● docker.service - Docker Application Container Engine

Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)

Active: failed (Result: start-limit) since 四 2020-05-14 11:02:36 CST; 5s ago

Docs: https://docs.docker.com

Process: 6732 ExecStart=/usr/bin/dockerd (code=exited, status=1/FAILURE)

Main PID: 6732 (code=exited, status=1/FAILURE)

5月 14 11:02:36 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.

5月 14 11:02:36 localhost.localdomain systemd[1]: Unit docker.service entered failed state.

5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service failed.

5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service holdoff time over, scheduling restart.

5月 14 11:02:36 localhost.localdomain systemd[1]: Stopped Docker Application Container Engine.

5月 14 11:02:36 localhost.localdomain systemd[1]: start request repeated too quickly for docker.service

5月 14 11:02:36 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.

5月 14 11:02:36 localhost.localdomain systemd[1]: Unit docker.service entered failed state.

5月 14 11:02:36 localhost.localdomain systemd[1]: docker.service failed.

In /var/log/messages you can find the following: Continue reading

CentOS 7, docker, error
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Apr 11 2022

OnlyOffice Docker pull argument exception: repository=onlyoffice/documentserver, tag=

Filed under Fixes, Linux, Simple about IT

Upon installing OnlyOffice with Docker by the provided script it ends up with the following error:

Docker pull argument exception: repository=onlyoffice/documentserver, tag=

It’s not clear what causes this error but the reason is obvious: Continue reading