For various reasons I don't really like black even if it's very good at what it does.
The readability of a Django model with aligned fields vs after running black is a good example of why I'd never use it by default.
Anyhow…
It would be nice to use black occasionally on snippets of code from
inside my editor (vim) but that almost never works as the first line
is already indented.
Not gonna lie, getting this to work was hard, plus I'm still not
super happy with the results but it's good enough. You can set
a static ip in the Proxmox cloud-init disk and that's what you'll
end up with on first boot.
Note: this probably also applies to Ubuntu 18.04
We currently host some of our customers on our private cloud and as a result we need to manage an ssl certificate for them as well. Traditionally we've used a standard SSL provider but this was not only pricey, more importantly it was a lot of work for the support staff to get certs, update certs, deploy certs, etc.
I just figured out how to compress any file to a fixed size. I can't even begin to tell you how revolutionary this is.
This will change the world over night:
Because I believe in Open Source I'm releasing this to the world. Pull requests for decompress() are welcome.
Here's a crappy little script that automates the steps in Fix proxmox containers that won't start
#!/bin/bash
if [ -z "$1" ]; then
containers=`pct list | grep stopped | awk '{print $1 " "}'`
else
containers=$1
fi
echo "restarting containers: $containers"
for m in $containers; do
lxc-start -n $m &
echo "force started $m"
done
echo "sleeping for 2 minutes while containers start"
sleep 120
for m in $containers; do
echo "shutting down $m"
pct shutdown $m;
echo "starting $m"
pct start $m &
done
With the version v0.10.0 of Nomad a very important new feature has landed, network namespaces. Network namespaces allows integration with Consul Connect and that allows you to connect to remote services without having to know their address and port. Plus some security stuff but I care more about my services working than being securely broken.
You can read more official information here:
Consul Connect in Nomad are called sidecars. However… sidecars are an advanced feature and the docs and examples are very confusing. At least I found them very confusing. So here is a slightly modified version of the example job file with lots of comments that hopefully explains how to use this great new feature.
My cluster was throwing warning Legacy BlueStore stats reporting detected and we could just not abide that.
Here's a simple way to upgrade:
cd /var/lib/ceph/osd
ls # note your osd numbers
ceph osd set noout
for n in 7 8 9 10 11 12 ; do
systemctl stop ceph-osd@$n.service;
ceph-bluestore-tool repair --path ceph-$n;
systemctl start ceph-osd@$n.service;
systemctl status ceph-osd@$n.service;
done
# I like to wait until the cluster goes back to green
# before doing the same on the next host
ceph osd unset noout
Sometimes an lxc container will refuse to start, usually after something goes wrong on the host. The key is to manually start the container and wait for some timeout or something, then the container will start properly.
Update: this does more or less the same but with less work.
pct list # note the vmid, replace 100 101 below as appropriate
for m in 100 101; do lxc-start -n $m & done
# after a minute or so you'll see the background tasks finish in the console
pct list # lxc containers should be running
# Note, that `systemd` will still show the tasks as failed since it didn't
# start them, so now lets stop/start them properly
for m in 100 101; do pct shutdown $m; pct start $m & done
The following is still valid but I now use the above method.
[root@proxmox1 ~]
# pct start 125
pJob for pve-container@125.service failed because a timeout was exceeded.
See "systemctl status pve-container@125.service" and "journalctl -xe" for details.
command 'systemctl start pve-container@125' failed: exit code 1
[root@proxmox1 ~]
# /usr/bin/lxc-start -n 125 -F
# good long wait, over a minute
# login and then `poweroff`
[root@proxmox1 ~]
# pct start 125 && echo $?
0
lxc-start -n 125 -Fpct start 125Before upgrading to Proxmox 6 you need to upgrade to Corosync 3. Here's an ansible playbook that will automate that…
We recently upgraded our network to 10 Gbit and were really hoping to see monumental speed increases in our ceph cluster.
One of our benchmarks was pgbench and to say we were sad
would be an understatement…