Category: Kev’s Blog

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Running Oracle 19c in a Docker container: part 1: out of disk space on my VM

This should be filed under “Can you? Yes. Should you? Probably not”

I tried creating a Docker container running Oracle 19c from Oracle official dockerfiles, and straight out of the gate ran out of diskspace:


 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 
checkSpace.sh: ERROR - There is not enough space available in the docker container. 
checkSpace.sh: The container needs at least 18 GB, but only 14 GB are available. 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 
Removing intermediate container b53a5e13a45c 
The command '/bin/sh -c chmod ug+x $INSTALL_DIR/*.sh &&     sync &&     $INSTALL_DIR/$CHECK_SPACE_FILE &&     $INSTALL_DIR/$SETUP_LINUX_FILE &&     rm -rf $INSTALL_DIR' returned a non-zero code: 1 


ERROR: Oracle Database Docker Image was NOT successfully created. 
ERROR: Check the output and correct any reported problems with the docker build operation. 

$ df -h 
Filesystem      Size  Used Avail Use% Mounted on 
udev            3.9G     0  3.9G   0% /dev 
tmpfs           798M  1.3M  797M   1% /run 
/dev/sda2        30G   12G   17G  41% /

The container needs at least 18GB? Of course it does.

Time to expand my VM disk space (using notes from when I previously had to do this here), and try again.

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Pause when sudo’ing commands on Ubuntu 18.04

I just installed an Ubuntu 18.04 server and noticed when using sudo for commands, it would pause for about 10 secs then execute the command.

A quick google found this post, mentioning that if you change the hostname during install, you should manually add the same hostname to the /etc/hosts for 127.0.0.1.

I did this and now sudo commands execute instantly as expected.

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Installing a desktop on Ubuntu 18.04 server

Ubuntu 18.04 Server does not come with a desktop by default, but any of the normally available desktops can be installed with the tasksel util. 

sudo apt-get install tasksel

List available desktop installations (and other installs/collection of packages):

tasksel --list-tasks

Select required desktop from displayed list and install, e.g.:

sudo tasksel install lubuntu-desktop

Wait for install to complete, reboot, done.

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Another global Microsoft Azure outage today: how many outages have there been over the past few months?

Microsoft’s Azure cloud service had another major global outage today as a result of DNS issues, that impacted access to Office 365 (maybe it should be more realistically called Office 360-ish, give or take a few days of unexpected outages each year) and other services like Teams and Sharepoint.

There’s been a number of other significant outages over the past few months, which doesn’t give a good impression of Microsoft’s cloud reliability.

There was the multifactor access issue in November 2018 that again left users unable to logon for several hours.

In September 2018 there was the ‘weather related incident‘ related to a lightning strike near one of their datacenters in Texas. Although it only impacted Azure data centers in Texas, for some reason this outage had a cascading impact impacting access to Office 365 and related services across the US, with some users unable to access services for at least a day.

In June 2018 there was the datacenter cooling issue that took down access for most of Europe, another outage that lasted several hours.

What’s interesting in all these cases is that an issue impacting an Azure datacenter in a specific regional area impacted access to service across a much wider geographic area. You would think (or hope) there’s some planned level of cross region failover support for Azure services, but maybe there’s not?

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