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Advisory: (Revision) HPE Integrated Lights-Out 4 (iLO 4) – How to Format the NAND Used to Store AHS logs, OneView Profiles, and Intelligent Provisioning
Many of the methods below require an .XML file (which needs to be created and named "Force_Format.xml").
The content of the .XML file needs to be similar to the following, with the iLO administrator username and password replaced for Administrator and Password on line 2:

HPONCFG <bay #> << end_marker
<RIBCL VERSION="2.0">
<LOGIN USER_LOGIN="adminname" PASSWORD="password">
<RIB_INFO MODE="write">
<FORCE_FORMAT VALUE="all"/>
</RIB_INFO>
</LOGIN>
</RIBCL>

The iLO 4 firmware version must be 2.44 or newer. Download the most recent version available on HPE.com as follows:

Click the following link:
http://h20566.www2.hpe.com/portal/site/hpsc

If the server is powered on when performing the NAND format, a server reboot is required after a successful NAND format. This reboot repopulates the RIS and RESTful data on the server during the next server POST with iLO 4 firmware version 2.53 or newer installed.

NAND Format Method 5: Linux or VMware (Local Format)

Download and install HPONCFG on the local server or a remote Windows host or client. To download the utility:

Click the following link:
http://h20566.www2.hpe.com/portal/site/hpsc

Place the "Force_Format.xml" file (described in the prerequisites section above) in the folder with the utility. The default location is /opt/hp/tools.
Format the NAND usinghponcfg from the /opt/hp/tools directory. The command below assumes the .xml file is named Force_Format.xml.
./hponcfg -I Force_Format.xml

When the format completes successfully, there will be a message similar to the following: "Script succeeded for IP:XXX.XXX.XXX.XXX."
hp  hardware  troubleshoot  ilo 
yesterday by some_hren
Advisory: (Revision) HPE Integrated Lights-Out 4 (iLO 4) - HPE Active Health System (AHS) Logs and HPE OneView Profiles May Be Unavailable Causing iLO Self-Test Error 8192, Embedded Media Manager and Other Errors
On an HPE Gen8-series or HPE ProLiant Gen9-series servers with HPE Integrated Lights-Out 4 (iLO 4), the NAND flash device may not initialize or mount properly, which may cause a variety of symptoms, which are listed below:
...
SCOPE
Any HPE ProLiant Gen8-series or HPE ProLiant Gen9-series server running iLO 4.

RESOLUTION
The resolution for this issue may take several steps that need to be completed in the order specified below.

OVERVIEW

Step 1) Upgrade the iLO 4 firmware to version 2.61
Step 2) Perform a NAND format
Step 3) Check the iLO status If the iLO status is normal, then skip to Step 6 If the iLO status is still degraded, continue to Step 4
Step 4) Schedule downtime; AC power-cycle and repeat the NAND format
Step 5) Check the iLO status If the iLO status is normal, continue to
Step 6 If the iLO status is still degraded, then skip to Step 7
Step 6) Perform these final steps if the system board does not need to be replaced: Reboot the server; reinstall IP; and refresh the server in OneView (if server is managed by OneView)
Step 7) If steps 1-4 did not resolve the degraded iLO, replace the system board.

Note: The 2.61 iLO 4 firmware is a critical update. As such, HPE requires users to update to this version immediately. Install this update to take advantage of significant improvements to the write algorithm for the embedded 4 GB non-volatile flash memory (also known as the NAND). These improvements increase the NAND lifespan.

Step 1. Upgrade the iLO 4 firmware to version 2.61. To download the firmware. The latest version of the iLO 4 firmware is available as follows:

Note: For ESXi hosts booting from the Embedded SD Card (Gen8/Gen9)- it is strongly recommended to perform this step with the ESXi OS shutdown.

Click the following link:
http://h20566.www2.hpe.com/portal/site/hpsc

Enter a product name (e.g., "iLO 4") in the text field under Enter a Product Name or Number.

Step 2. Perform NAND format using one of the methods detailed in the customer advisory: using one of the methods detailed in the customer advisory: HPE Integrated Lights-Out 4 (iLO 4) - How to Format the NAND Used to Store AHS logs, OneView Profiles, and Intelligent Provisioning
Find the document at:

http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=a00048622en_us
hp  hardware  troubleshoot  ilo 
yesterday by some_hren
iptables sometimes works inside container, sometimes not - docker 0.8.1 · Issue #4424 · moby/moby
In short, you need to use --cap-add=NET_ADMIN when you launch a Docker Image to be able to enable tools such as the ufw tool in say a Docker image running the Ubuntu . 16.04 image, for example.
github  forum  howto  run  docker  container  troubleshoot  fix  network  admin  capabilities  universal  firewall  ufw  example  guide  reference 
5 days ago by racl101
Connecting to a mysql running on a Docker container · Issue #95 · docker-library/mysql
Frankly, this forum page has no consensus on a solution to this issue. Nevertheless, what worked for me on my set up with running MacOS as the Docker host and running a container with: Ubuntu 16.04 and MySQL 5.7 is the following:

1) Within the container: change in /etc/mysql/mysql.conf.d/mysqld.cnf the bind-address option from 127.0.0.1 to 0.0.0.0
2) Restart MySQL server (note that whenever you start MySQL you must use this command in the Dockerfile:

RUN sed -i -e"s/^bind-address\s*=\s*127.0.0.1/bind-address = 0.0.0.0/" /etc/mysql/mysql.conf.d/mysqld.cnf
RUN find /var/lib/mysql -type f -exec touch {} \; && service mysql start

That is, you must touch the files in /var/lib/mysql and then start the server with service command and not systemctl.

Next, create a user separate from root e.g. dev_1, in MySQL and given them privileges to their '0.0.0.0' and '%' hosts. Like this in the Dockerfile:

RUN find /var/lib/mysql -type f -exec touch {} \; && service mysql start && mysql -uroot -proot mysql -e "GRANT ALL ON *.* TO root@'0.0.0.0' IDENTIFIED BY 'secret' WITH GRANT OPTION; CREATE USER 'dev_1'@'0.0.0.0' IDENTIFIED BY 'secret'; GRANT ALL ON *.* TO 'dev_1'@'0.0.0.0' IDENTIFIED BY 'secret' WITH GRANT OPTION; GRANT ALL ON *.* TO 'dev_1'@'%' IDENTIFIED BY 'secret' WITH GRANT OPTION; FLUSH PRIVILEGES;"

Then when you start the container you must publish the port number like so:

docker run -t -d -p 4406:3306 ubuntu_16_04_lemp_php_7_2:latest

If your container stops prematurely, then you might want to add a CMD line in your docker file to run a start.sh script and within that script you might want to add something like this:

# stupid hack to keep container from being stopped
tail -f /dev/null

Finally, to connect to your DB instance on your local MacOS machine with an app like Sequel Pro for example, use the following credentials:

Host: 0.0.0.0
Username: dev_1
Password: <dev_1_password>
Port: 4406

If you don't like to use port 4406, try 3307, 3308, 3309.
github  forum  howto  example  troubleshoot  mysql  server  docker  host  connection  issue  sequel  pro  mariadb  client  hostname  docker-machine  ip  address  ipaddress  guide  reference  toread  tolearn  totry  tounderstand  image  port  detached  database  credentials 
5 days ago by racl101
Docker container will automatically stop after "docker run -d" - Stack Overflow
TLDR: I've tried adding: tail -f /dev/null to my start script and that worked allong with invoking the container with the: docker run -t -d <image-name> command invocation.
stackoverflow  howto  troubleshoot  example  docker  container  automatically  suddenly  stops  running  detached  mode  foreground  workaround  hack  hackfix  fix  toread  tolearn  totry  tounderstand  guide  reference 
6 days ago by racl101
Sysdig | The OpenSource Journey
Sysdig is open source, system-level exploration. Capture system state and activity from a running Linux instance, then save, filter, and analyze.
sysdig  tool  docker  troubleshoot  sysadmin  monitor  monitoring  kubernetes  top  ps 
15 days ago by devnulled
Troubleshooting Java Applications With Arthas - DZone Java
"Arthas is a Java Diagnostic tool open sourced by Alibaba. Arthas can help developer trouble-shoot production issues for Java applications without modifying your code or restarting your server."
java  debug  production  application  troubleshoot  diagnosis  live  program  server  slow  speed  fast  method  call  stack 
19 days ago by ebouchut
FTP to MAMP localhost on macOS – Slithy.me
On macOS Sierra, running local servers via MAMP, and wanting to connect to servers using my FTP client. Yes, I know I can copy files into localhost via Finder, but I have my reasons.

Go System Preferences => Sharing.
Enable Remote Login.
You will see:

Remote Login: On
To log in to this computer remotely, type “ssh username@xxx.xxx.x.xx”.

In your FTP client, create a new SFTP connection with the settings:

Server: xxx.xxx.x.xx
User Name: username
Password: your user password for the system
The connection will dump you into the user folder
troubleshoot  tutorial  mamp  macosx  sierra  filesharing  filezilla  ftp 
4 weeks ago by Mumra2k

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