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Berlin's questions

Martin Hope
Berlin
Asked: 2017-07-25 16:10:08 +0800 CST
  • 1

Is there a way if file not exist to server another app-*.js file in other folder, example:

Go to URL: http://www.example.com/assets/build/app/app-48fee50a26.js

I am getting the following error message:

[error] 17788#17788: *1 open() "/var/app/assets/build/app/app-48fee50a26.js" failed (2: No such file or directory), client: , server: , request: "GET /assets/build/app/app-48fee50a26.js HTTP/1.1", host:""

I want to serve instead any other js file in the same folder /var/app/assets/build/app/, but the name of the other file can constantly change, for example app-62a5962b0a11.js. I was thinking about app\-(.*)\.js.

all the examples below does not work:

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /assets/build/app/app\-(.*)\.js;
        }
}

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /var/app/assets/build/app/app\-(.*)\.js;
        }
}


Also not working without regex to the location of the other file.

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /var/app/assets/build/app/app-62a5962b0a11.js;
        }
}

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /assets/build/app/app-62a5962b0a11.js;
        }
}
nginx
Martin Hope
Berlin
Asked: 2017-07-21 04:02:33 +0800 CST
  • 2

I have tried the following command to check the an average memory usage by single PHP-FPM process

ps --no-headers -o "rss,cmd" -C php-fpm | awk '{ sum+=$1 } END { printf ("%d%s\n", sum/NR/1024,"M") }'

and I got an error awk: cmd. line:1: fatal: division by zero attempted

And this command

total=0; for i in `ps -C php-fpm -o rss=`; do total=$(($total+$i)); done; echo "Memory usage: $total kb";
Memory usage: 0 kb

ps -ef | grep php
root       9435      1  0 11:42 ?        00:00:00 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf)
somename+   9438   9435  0 11:42 ?        00:00:00 php-fpm: pool somename-1
somename+   9439   9435  0 11:42 ?        00:00:01 php-fpm: pool somename-1 
...
...
linux
Martin Hope
Berlin
Asked: 2017-01-13 02:40:01 +0800 CST
  • 0

I have been trying to install mysql-community-client-5.7.17-1.fc25.x86_64.rpm on CentOS Linux release 7.3.1611 and the RPM complain about libncurses.so.6()(64bit)

rpm -Uvh mysql-community-client-5.7.17-1.fc25.x86_64.rpm

warning: mysql-community-client-5.7.17-1.fc25.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
        libncurses.so.6()(64bit) is needed by mysql-community-client-5.7.17-1.fc25.x86_64
        libstdc++.so.6(GLIBCXX_3.4.20)(64bit) is needed by mysql-community-client-5.7.17-1.fc25.x86_64
        libstdc++.so.6(GLIBCXX_3.4.21)(64bit) is needed by mysql-community-client-5.7.17-1.fc25.x86_64
        libtinfo.so.6()(64bit) is needed by mysql-community-client-5.7.17-1.fc25.x86_64

-

CentOS Linux release 7.3.1611 (Core)
Derived from Red Hat Enterprise Linux 7.3 (Source)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.3.1611 (Core)
CentOS Linux release 7.3.1611 (Core)
cpe:/o:centos:centos:7
centos mysql
Martin Hope
Berlin
Asked: 2016-12-20 15:28:48 +0800 CST
  • 1

I got this error mysql systemd[1]: [/usr/lib/systemd/system/mysqld.service:39] Failed to parse resource value, ignoring: 40000 on Centos 7 with mysql 5.7 when I set the LimitMEMLOCK limit for MYSQL 5.7.

LimitMEMLOCK=40000
  1. Why it is not possible to set a numeric limit for LimitMEMLOCK?
  2. What is the purpose of LimitMEMLOCK ?
  3. Is the only soultion LimitMEMLOCK=infinity?

*

#cat /etc/*-release
CentOS Linux release 7.3.1611 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.3.1611 (Core)
CentOS Linux release 7.3.1611 (Core)

*

service mysqld status
Redirecting to /bin/systemctl status  mysqld.service
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2016-12-19 23:21:24 UTC; 9s ago
 Main PID: 11170 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─11170 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

mysql systemd[1]: Starting MySQL Server...
mysql mysqld_pre_systemd[11143]: /usr/sbin/restorecon:  Warning no default label for /mnt/data/mysql
mysql systemd[1]: Started MySQL Server.
mysql systemd[1]: [/usr/lib/systemd/system/mysqld.service:39] Failed to parse resource value, ignoring: 40000

I do not see this error message on other Centos 7 version (CentOS Linux release 7.2.1511 (Core)) when mysqld.service set up with LimitMEMLOCK=40000.

cat /etc/*-release
CentOS Linux release 7.2.1511 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.2.1511 (Core)
CentOS Linux release 7.2.1511 (Core)
mysql centos7 systemd
Martin Hope
Berlin
Asked: 2016-12-20 08:08:37 +0800 CST
  • 1

I tried to install mysql 5.7 on centos 7 and I got the below error,

I was able to install successfully more than one time on different machines with centos 7, but this is the first time I encountered this issue.

Any idea why it's happening and how to fix ? 

# cat /etc/*-release
CentOS Linux release 7.3.1611 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.3.1611 (Core)
CentOS Linux release 7.3.1611 (Core)

*

# yum install cpio -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: ftp.heanet.ie
 * extras: ftp.heanet.ie
 * updates: ftp.heanet.ie
Package cpio-2.11-24.el7.x86_64 already installed and latest version
Nothing to do

*

# rpm  -U /tmp/mysql-community-client-5.7.16-1.el7.x86_64.rpm
error: unpacking of archive failed on file /usr/bin/mysqladmin;585801cb: cpio: read failed - No such file or directory
error: mysql-community-client-5.7.16-1.el7.x86_64: install failed

*

* remote_file[/tmp/mysql-community-client-5.7.16-1.el7.x86_64.rpm] action create (up to date)
* rpm_package[mysql-community-client-5.7.16-1.el7.x86_64.rpm] action install
================================================================================
Error executing action `install` on resource 'rpm_package[mysql-community-client-5.7.16-1.el7.x86_64.rpm]'
================================================================================


Chef::Exceptions::Exec
----------------------
rpm  -U /tmp/mysql-community-client-5.7.16-1.el7.x86_64.rpm returned 1, expected 0


Resource Declaration:
---------------------

 24:        rpm_package pkg do
 25:         source "/tmp/#{pkg}"
 26:         action :install
 27:         end
 28:



Compiled Resource:
------------------

rpm_package("mysql-community-client-5.7.16-1.el7.x86_64.rpm") do
  provider Chef::Provider::Package::Rpm
  action [:install]
  retries 0
  retry_delay 2
  package_name "mysql-community-client-5.7.16-1.el7.x86_64.rpm"
  source "/tmp/mysql-community-client-5.7.16-1.el7.x86_64.rpm"
  version "5.7.16-1.el7"
  recipe_name "mysql57_centos7"
end

ERROR: rpm_package[mysql-community-client-5.7.16-1.el7.x86_64.rpm] had an error: Chef::Exceptions::Exec: rpm  -U /tmp/mysql-community-client-5.7.16-1.el7.x86_64.rpm returned 1, expected 0
FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)
centos mysql centos7 cpio
Martin Hope
Berlin
Asked: 2016-10-08 17:44:45 +0800 CST
  • 1

I have some complicated question:

I have connected multiple VPCs with EC2 Instances (IPSec) for routing traffic between VPC's across regions, I have VPN connection to each aws region, and everything is working fine.

Traffic from my office to 10.20.*.* go to ->
VPN connection LINE 1 in AWS eu-west-1 ->
vpc_ireland - CIDR 10.20.0.0/16
here I have ipsec instance that route the traffic from 10.60.0.0/16 to vpc_viriginia

Traffic from my office to 10.60.*.* go to ->
VPN connection LINE 2 in AWS us-east-1 ->
vpc_viriginia - CIDR 10.60.0.0/16
in AWS us-east-1 I have ipsec instance that route the traffic from 10.20.0.0/16 to vpc_ireland

I want to make sure that if one of the vpn connections/lines goes down, I will still be able to access the aws region via the other VPN in the other aws region.

For example if VPN connection LINE 2 (virginia) goes down, automatically all the traffic from my office to 10.60.*.* will go to VPN connection LINE 1 (vpc_ireland) and from there it will route to vpc_viriginia with my IPSec instance, like nothing happen.

example: if VPN connection LINE 2 goes down: myoffice -> 10.60.203.11 -> VPN connection LINE 1 -> vpc_ireland -> ipsec instance in ireland -> vpc_viriginia

As I said I have connection between my regions with IPSec instances.

My question is, if VPN connection LINE 2 goes down, all the traffic to 10.60.*.* will route automatically from my office to vpc_ireland - CIDR 10.20.0.0/16, but I guess the vpc_ireland will reject them because the IPs 10.60.*.* are not in the same network of vpc_ireland - CIDR 10.20.0.0/16.

So I wonder what are my options (without removing my current AWS VPN) ?

To be more specific, how I can route traffic from IPs (lets say for example 10.60.111.9) via Ireland VPN connection (when Virginia VPN connection goes down), to vpc_ireland, but the IPs that I route are not in the same network CIDR 10.20.0.0/16 ?

The question refers only to AWS side, after I route the traffic from my office.

I will be happy to answer any questions if my question is not understandable.

Thanks in advance!!

UPDATE - I will try to be more specific with my question:

  1. AWS VPN in Virginia goes down.
  2. All the traffic from my office 10.60.*.* route to AWS VPN connection LINE 1 in AWS eu-west-1.
  3. So if I ping now from my office to 10.60.100.13 it will be route to Ireland VPN. 4.but the VPC in Ireland with CIDR block 10.20.0.0/16.

If I will be able to route somehow the traffic that goes to Ireland VPN from IPs in CIDR block 10.60.*.* to my current VPC in Ireland with CIDR block 10.20.0.0/16, I could use my routing table and my IPSEC instance to route it back to Virginia VPC.

Is it possible at all to route traffic from different subnet to another CIDR block in VPC ? IP 10.60.100.13 to CIDR block 10.20.0.0/16?

amazon-web-services amazon-vpc vpc-peering