Provide writable directories by default

[jawnsy]

Closes: #54

---

Orion

I've installed orion using the following command, to disable PostgreSQL:

helm upgrade prefect-orion ./charts/prefect-orion --install --set=postgresql.enabled=false

I then verified that orion starts successfully using SQLite:

$ kubectl exec -it deployment/prefect-orion -- ls -alR
.:
total 16
drwxrwsrwx 3 root 1001 4096 Oct  4 23:33 .
drwxr-xr-x 1 root root 4096 Oct  4 23:28 ..
-rw------- 1 1001 1001   34 Oct  4 23:33 .bash_history
drwxr-sr-x 2 1001 1001 4096 Oct  4 23:36 .prefect

./.prefect:
total 584
drwxr-sr-x 2 1001 1001   4096 Oct  4 23:36 .
drwxrwsrwx 3 root 1001   4096 Oct  4 23:33 ..
-rw-r--r-- 1 1001 1001     93 Oct  4 23:29 memo_store.toml
-rw-r--r-- 1 1001 1001 585728 Oct  4 23:29 orion.db

From filesystem mounts, both the home directory and tmp directory are available and writable:

$ kubectl exec -it deployment/prefect-orion -- findmnt | grep -E '(/tmp|home)'
├─/tmp /dev/sda1[/var/lib/kubelet/pods/8ed9efee-1f96-4c6b-a920-03f382656089/volumes/kubernetes.io~empty-dir/scratch/tmp]
├─/home/prefect
│      /dev/sda1[/var/lib/kubelet/pods/8ed9efee-1f96-4c6b-a920-03f382656089/volumes/kubernetes.io~empty-dir/scratch/home]

Agent

I've installed the agent using the following command:

helm upgrade prefect-agent ./charts/prefect-agent --install --set=agent.cloudApiConfig.accountId=aa44c164-ecc4-4c76-9c85-4a2f1835f36b --set=agent.cloudApiConfig.workspaceId=b97ece4a-c5a2-4430-95ff-b6e6eb20d7ea

I verified that I can install packages:

$ kubectl exec -it deployment/prefect-agent -- pip install pytest
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: pytest in ./.local/lib/python3.10/site-packages (7.1.3)
Requirement already satisfied: attrs>=19.2.0 in /usr/local/lib/python3.10/site-packages (from pytest) (22.1.0)
Requirement already satisfied: iniconfig in ./.local/lib/python3.10/site-packages (from pytest) (1.1.1)
Requirement already satisfied: packaging in /usr/local/lib/python3.10/site-packages (from pytest) (21.3)
Requirement already satisfied: py>=1.8.2 in ./.local/lib/python3.10/site-packages (from pytest) (1.11.0)
Requirement already satisfied: pluggy<2.0,>=0.12 in ./.local/lib/python3.10/site-packages (from pytest) (1.0.0)
Requirement already satisfied: tomli>=1.0.0 in ./.local/lib/python3.10/site-packages (from pytest) (2.0.1)
Requirement already satisfied: pyparsing!=3.0.5,>=2.0.2 in /usr/local/lib/python3.10/site-packages (from packaging->pytest) (3.0.9)
WARNING: You are using pip version 21.3.1; however, version 22.2.2 is available.
You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.

[jamiezieziula]

lgtm! thank you!

[Seldonm]

I tried to install the chart with the last version 2.4.5 but it seems that is still using the old path (/opt/prefect), giving a write permission error when the pod starts

[jamiezieziula]

@Seldonm just to clarify - you installed the chart with the latest release or with the latest local version available from this repo?

[Seldonm]

@Seldonm just to clarify - you installed the chart with the latest release or with the latest local version available from this repo?

i installed the latest release from the Helm repository, chart version 2022.10.04

[jamiezieziula]

Got it - that doesn't contain this PR. I'll get a release out tomorrow that will have this change in it.

[Seldonm]

Got it - that doesn't contain this PR. I'll get a release out tomorrow that will have this change in it.

Thank you very much. Meanwhile i'll test it by building locally the repo