vault backup: 2025-04-15 19:44:48

7 files changed, 163 insertions, 11 deletions

diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 9818d14..d57c196 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -36,9 +36,54 @@
               "icon": "lucide-file",
               "title": "Device mapper"
             }
+          },
+          {
+            "id": "30f6cf07a77bd478",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "Examples of proper JQ usage.md",
+                "mode": "source",
+                "backlinks": true,
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Examples of proper JQ usage"
+            }
+          },
+          {
+            "id": "c550cd183351059f",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "Using Libvirt to manage QEMU image bitmaps.md",
+                "mode": "source",
+                "backlinks": true,
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Using Libvirt to manage QEMU image bitmaps"
+            }
+          },
+          {
+            "id": "5b6958c83833df4a",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "daily/15-Apr-2025.md",
+                "mode": "source",
+                "backlinks": true,
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "15-Apr-2025"
+            }
           }
         ],
-        "currentTab": 1
+        "currentTab": 4
       }
     ],
     "direction": "vertical"
@@ -69,7 +114,7 @@
             "state": {
               "type": "search",
               "state": {
-                "query": "rbd",
+                "query": "qemu bitm",
                 "matchingCase": false,
                 "explainSearch": false,
                 "collapseAll": false,
@@ -189,10 +234,16 @@
       "obsidian-excalidraw-plugin:New drawing": false
     }
   },
-  "active": "a06a83491e7620e5",
+  "active": "5b6958c83833df4a",
   "lastOpenFiles": [
-    "daily/11-Apr-2025.md",
+    "How to properly do options in a bash script with getopt!.md",
+    "daily/15-Apr-2025.md",
+    "Using Libvirt to manage QEMU image bitmaps.md",
+    "daily/14-Apr-2025.md",
+    "We don't support filesystem discard syscalls on our openstack platform.md",
+    "Examples of proper JQ usage.md",
     "Device mapper.md",
+    "daily/11-Apr-2025.md",
     "daily/10-Apr-2025.md",
     "List of tags I use in this Vault and their purpose.md",
     "Managing Ceph on Devstack & OpenStack.md",
@@ -212,12 +263,6 @@
     "Installing Ceph on devstack.md",
     "Overview of Ceph.md",
     "Gobs Ceph Client Key Access.md",
-    "Detroit-style TDD.md",
-    "Blank Page Syndrom is when you start with infinite choice and cannot make a choice.md",
-    "London-style TDD.md",
-    "Discovery Testing.md",
-    "YAGNI.md",
-    "Network outage on single hypervisor causes Freenet to shutdown EVERYTHING.md",
     "ESP",
     "Excalidraw"
   ]
diff --git a/Examples of proper JQ usage.md b/Examples of proper JQ usage.md
new file mode 100644
index 0000000..b63ee4e
--- /dev/null
+++ b/Examples of proper JQ usage.md
@@ -0,0 +1,11 @@
+---
+tags:
+  - linux
+  - jq
+  - howto
+---
+Double escapes are important!
+
+```
+jq -r '.fixed_ips[] | select(.ip_address | test("\\.")) | .ip_address'
+```
\ No newline at end of file
diff --git a/How to properly do options in a bash script with getopt!.md b/How to properly do options in a bash script with getopt!.md
new file mode 100644
index 0000000..7d417c5
--- /dev/null
+++ b/How to properly do options in a bash script with getopt!.md
@@ -0,0 +1,31 @@
+---
+tags:
+  - bash
+---
+```
+#!/bin/bash
+
+while getopts "ab:c" opt; do
+  case "$opt" in
+    a)
+      echo "Option -a was specified."
+      ;;
+    b)
+      echo "Option -b was specified with argument: $OPTARG"
+      ;;
+    c)
+      echo "Option -c was specified."
+      ;;
+    \?)
+      echo "Invalid option: -$OPTARG" >&2
+      exit 1
+      ;;
+  esac
+done
+
+shift $((OPTIND - 1))
+
+echo "Remaining arguments: $@"
+```
+
+man bash // getopt
\ No newline at end of file
diff --git a/Using Libvirt to manage QEMU image bitmaps.md b/Using Libvirt to manage QEMU image bitmaps.md
index 92eef5f..72942b3 100644
--- a/Using Libvirt to manage QEMU image bitmaps.md
+++ b/Using Libvirt to manage QEMU image bitmaps.md
@@ -18,4 +18,12 @@ There are six primary bitmap-management API commands:
 And one related query command:
 - `query-block`
 
-The `node` argument to bitmap cmds can be found as `node-name` in `query-block` results.
\ No newline at end of file
+The `node` argument to bitmap cmds can be found as `node-name` in `query-block` results.
+
+
+#### Removing a dirty bitmap
+Cannot be removed if it is busy.
+Arguments: node, nameg
+
+---
+https://qemu-project.gitlab.io/qemu/interop/bitmaps.html
\ No newline at end of file
diff --git a/We don't support filesystem discard syscalls on our openstack platform.md b/We don't support filesystem discard syscalls on our openstack platform.md
new file mode 100644
index 0000000..a8bb498
--- /dev/null
+++ b/We don't support filesystem discard syscalls on our openstack platform.md
@@ -0,0 +1,7 @@
+---
+tags:
+  - openstack
+  - work
+  - groupvps
+---
+This is due to the NetAPP driver implementing discard as sending NUL-bytes, which increases load significantly.
\ No newline at end of file
diff --git a/daily/14-Apr-2025.md b/daily/14-Apr-2025.md
new file mode 100644
index 0000000..94bc485
--- /dev/null
+++ b/daily/14-Apr-2025.md
@@ -0,0 +1,22 @@
+Monday!
+
+# Standup
+OnFailure handlers installeren voor rename script ZFS datasets op backup nodes.
+Survey invullen
+Puppetrun failed nalopen
+Uitzoeken waarom de F QEMU GA sporadisch faalt
+- Dit had geloof ik iets te maken met QEMU crash ? Ff dubbel checken, heb er ergens een note van denk ik.
+# QA with Webglobe team
+Q: Virtual buses, volumes, suggested virtio. Can we do iSCSI instead of VirtIO because we do discards?
+A: We don't support discard. NetAPP implements by sending nul bytes. -> increase IO
+^ i wouldn't know this
+
+Q: Can we install from CD?
+R: yes, possible. create image, props, iso boot, boot vm rescue from image.
+J: documented?
+R: Will find dgoc for onehome
+
+Q: IP addresses, do we really need to let OS handle the allocation?
+A: OpenStack does this out of the box; used as single source of truth.
+J: Finds reason acceptable; will rewrite.
+
diff --git a/daily/15-Apr-2025.md b/daily/15-Apr-2025.md
new file mode 100644
index 0000000..06ab31a
--- /dev/null
+++ b/daily/15-Apr-2025.md
@@ -0,0 +1,28 @@
+**Interview Ali**
+
+Q:
+Waarom ga je weg bij Leaseplan?
+Over openstack deployment: hoe geautomatiseerd; welke tools?
+
+> Implemented virtual staging clusters mirroring the production architecture using KVM, libvirt, Linux bridge/virtual interfaces, and iptables, reducing setup time by 90% while significantly optimizing costs.
+
+Did you directly integrate to KVM/Libvirt, can you tell a bit about that?
+
+A:
+php/wordpress dev
+exp with cpanel and such
+then switch devops
+
+
++1 kolla ansible / openstack
++1 cpanel/hosting
+-1 geen puppet ervaring
++1 ovn ervaring; meest voorname probleem is met ovs/ovn
+
+beetje rare sidetrack config mgmt ansible vs puppet; maakt punt over consistency
+
+Q: regular day
+Q: expectations
+
+In amsterdam
+Avail: 1 june
\ No newline at end of file