X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=automation%2Fansible%2FREADME.md;h=fac4b7ceeb94a704d458159f77582eb2e4e11d81;hb=1f28dd0828bd28a42258aad69a6c6cda012b75cb;hp=57a171cc421ce35ef5f9e9d41ef22f259f427817;hpb=fc7346bb7449a2981a2cde9d489c6f0024982f77;p=lttng-ci.git

diff --git a/automation/ansible/README.md b/automation/ansible/README.md
index 57a171c..fac4b7c 100644
--- a/automation/ansible/README.md
+++ b/automation/ansible/README.md
@@ -1,3 +1,9 @@
+# Setup on Ubuntu
+
+```
+apt install ansible ansible-mitogen
+```
+
 # Required collections
 
 ```
@@ -32,3 +38,107 @@ ansible-playbook -i hosts [-l SUBSET] site.yaml
 1. Configure either SSH or WinRM connection: see https://docs.ansible.com/ansible/latest/os_guide/windows_setup.html
 2. For arm64 hosts:
   * Install the necessary optional features (eg. OpenSSH, Hyper-V) since Windows RSAT isn't available on Arm64 yet
+
+## CI 'rootnode'
+
+1. Add an entry to the `vms` variable in the host vars for a libvirt host
+  * See the defaults and details in `roles/libvirt/vars/main.yml` and `roles/libvirt/tasks/main.yml`
+  * Make sure to set the `cdrom` key to the path of ISO for the installer
+2. Run the playbook, eg. `ansible-playbook -i hosts -l cloud07.internal.efficios.com site.yml`
+  * The VM should be created and started
+3. Once the VM is installed take a snapshot so that Jenkins may revert to the original state
+
+### Ubuntu auto-installer
+
+1. Note your IP address
+2. Switch to the directory with the user-data files: `cd roles/libvirt/files`
+3. Write out the instance-specific metadata, eg.
+
+```
+cat > meta-data <<EOF
+instance-id: iid-XXX
+hostname: XXX.internal.efficios.com
+EOF
+```
+  * The instance-id is used to determine if re-installation is necessary.
+4. Start a python web server: `python3 -m http.server 3003`
+5. Connect to the VM using a remote viewer on the address given by `virsh --connect qemu+ssh://root@host/system domdisplay`
+6. Edit the grub boot options for the installer and append the following as arguments for the kernel: `autoinstall 'ds=nocloud-net;s=http://IPADDRESS:3003/'` and boot the installer
+  * Note that the trailing `/` and quoting are important
+  * The will load the `user-data`, `meta-data`, and `vendor-data` files in the directory served by the python web server
+7. After the installation is complete, the system will reboot and run cloud-init for the final portion of the initial setup. Once completed, ansible can be run against it using the ubuntu user and becoming root, eg. `ansible-playbook -i hosts -u ubuntu -b ...`
+
+# LXD Cluster
+
+## Start a new cluster
+
+1. For the initial member of the cluster, set the `lxd_cluster` variable in the host variables to something similar to:
+
+```
+lxd_cluster:
+  server_name: cluster-member-name
+  enabled: true
+  member_config:
+    - entity: storage-pool
+      name: default
+      key: source
+      value: tank/lxd
+```
+
+2. Run the `site.yml` playbook on the node
+3. Verify that storage pool is configured:
+
+```
+$ lxc storage list
+| name    | driver | state   |
+| default | zfs    | created |
+```
+
+  * If not present, create it on necessary targets:
+
+```
+$ lxc storage create default zfs source=tank/lxd --target=cluster-member-name
+# Repeat for any other members
+# Then, on the member itself
+$ lxc storage create default zfs
+# The storage listed should not be in the 'pending' state
+```
+
+4. Create a metrics certificate pair for the cluster, or use an existing one
+
+```
+openssl req -x509 -newkey ec -pkeyopt ec_paramgen_curve:secp384r1 -sha384 -keyout metrics.key -nodes -out metrics.crt -days 3650 -subj "/CN=metrics.local"
+lxc config trust add metrics.crt --type=metrics
+```
+
+## Adding a new host
+
+1. Generate a token for the new member: `lxc cluster add member-host-name`
+2. In the member's host_var's file set the following key:
+  * `lxd_cluster_ip`: The IP address on which the server will listen
+  * `lxd_cluster`: In a fashion similar to the following entry
+```
+lxd_cluster:
+  enabled: true
+  server_address: 172.18.0.192
+  cluster_token: 'xxx'
+  member_config:
+    - entity: storage-pool
+      name: default
+      key: source
+      value: tank/lxd
+```
+  * The `cluster_token` does not need to be kept in git after the the playbook's first run
+3. Assuming the member is in the host's group of the inventory, run the `site.yml` playbook.
+
+## Managing instances
+
+Local requirements:
+
+ * python3, python3-dnspython, samba-tool, kinit
+
+To automatically provision instances, perform certain operations, and update DNS entries:
+
+1. Update `vars/ci-instances.yml`
+2. Open a kerberos ticket with `kinit`
+3. Run the playbook, eg. `ansible-playbook playbooks/ci-instances.yml`