collect-logs

An Ansible role for aggregating logs from different nodes.

Requirements

This role gathers logs and debug information from a target system and collates them in a designated directory, artcl_collect_dir, on the localhost.

Additionally, the role will convert templated bash scripts, created and used by TripleO-Quickstart during deployment, into rST files. These rST files are combined with static rST files and fed into Sphinx to create user friendly post-build-documentation specific to an original deployment.

Finally, the role optionally handles uploading these logs to a rsync server or to an OpenStack Swift object storage. Logs from Swift can be exposed with os-loganalyze.

Role Variables

Collection related

• artcl_collect_list – A list of files and directories to gather from the target. Directories are collected recursively and need to end with a “/” to get collected. Should be specified as a YaML list, e.g.:

artcl_collect_list:
    - /etc/nova/
    - /home/stack/*.log
    - /var/log/

• artcl_collect_list_append – A list of files and directories to be appended in the default list. This is useful for users that want to keep the original list and just add more relevant paths.
• artcl_exclude_list – A list of files and directories to exclude from collecting. This list is passed to rsync as an exclude filter and it takes precedence over the collection list. For details see the “FILTER RULES” topic in the rsync man page.
• artcl_collect_dir – A local directory where the logs should be gathered, without a trailing slash.
• artcl_gzip_only: false/true – When true, gathered files are gzipped one by one in artcl_collect_dir, when false, a tar.gz file will contain all the logs.
• collect_log_types - A list of which type of logs will be collected, such as openstack logs, network logs, system logs, etc. Acceptable values are system, monitoring, network, openstack and container.

Documentation generation related

• artcl_gen_docs: false/true – If true, the role will use build artifacts and Sphinx and produce user friendly documentation (default: false)
• artcl_docs_source_dir – a local directory that serves as the Sphinx source directory.
• artcl_docs_build_dir – A local directory that serves as the Sphinx build output directory.
• artcl_create_docs_payload – Dictionary of lists that direct what and how to construct documentation.
  • included_deployment_scripts – List of templated bash scripts to be converted to rST files.
  • included_deployment_scripts – List of static rST files that will be included in the output documentation.
  • table_of_contents – List that defines the order in which rST files will be laid out in the output documentation.
• artcl_verify_sphinx_build – false/true – If true, verify items defined in artcl_create_docs_payload.table_of_contents exist in sphinx generated index.html (default: false)

artcl_create_docs_payload:
  included_deployment_scripts:
    - undercloud-install
    - undercloud-post-install
  included_static_docs:
    - env-setup-virt
  table_of_contents:
    - env-setup-virt
    - undercloud-install
    - undercloud-post-install

Publishing related

• artcl_publish: true/false – If true, the role will attempt to rsync logs to the target specified by artcl_rsync_url. Uses BUILD_URL, BUILD_TAG vars from the environment (set during a Jenkins job run) and requires the next to variables to be set.
• artcl_txt_rename: false/true – rename text based file to end in .txt.gz to make upstream log servers display them in the browser instead of offering them to download
• artcl_publish_timeout: the maximum seconds the role can spend uploading the logs, the default is 1800 (30 minutes)
• artcl_use_rsync: false/true – use rsync to upload the logs
• artcl_rsync_use_daemon: false/true – use rsync daemon instead of ssh to connect
• artcl_rsync_url – rsync target for uploading the logs. The localhost needs to have passwordless authentication to the target or the PROVISIONER_KEY Var specificed in the environment.
• artcl_use_swift: false/true – use swift object storage to publish the logs
• artcl_swift_auth_url – the OpenStack auth URL for Swift
• artcl_swift_username – OpenStack username for Swift
• artcl_swift_password – password for the Swift user
• artcl_swift_tenant_name – OpenStack tenant name for Swift
• artcl_swift_container – the name of the Swift container to use, default is logs
• artcl_swift_delete_after – The number of seconds after which Swift will remove the uploaded objects, the default is 2678400 seconds = 31 days.
• artcl_artifact_url – a HTTP URL at which the uploaded logs will be accessible after upload.
• artcl_collect_sosreport – true/false – If true, create and collect a sosreport for each host.

Logs parsing

"Sova" module parses logs for known patterns and returns messages that were found. Patterns are tagged by issues types, like "infra", "code", etc. Patterns are located in file sova-patterns.yml in vars/ directory.

• config - patterns loaded from file
• files - files and patterns sections match
• result - path to file to write a result of parsing
• result_file_dir - directory to write a file with patterns in name

Example of usage of "sova" module:

---
- name: Run sova task
  sova:
    config: "{{ pattern_config }}"
    files:
      console: "{{ ansible_user_dir }}/workspace/logs/quickstart_install.log"
      errors: "/var/log/errors.txt"
      "ironic-conductor": "/var/log/containers/ironic/ironic-conductor.log"
      syslog: "/var/log/journal.txt"
      logstash: "/var/log/extra/logstash.txt"
    result: "{{ ansible_user_dir }}/workspace/logs/failures_file"
    result_file_dir: "{{ ansible_user_dir }}/workspace/logs"

Example Role Playbook

---
- name: Gather logs
  hosts: all:!localhost
  roles:
    - collect-logs

** Note:

The tasks that collect data from the nodes is executed with ignore_errors. For example:

Templated Bash to rST Conversion Notes

Templated bash scripts used during deployment are converted to rST files during the create-docs portion of the role’s call. Shell scripts are fed into an awk script and output as restructured text. The awk script has several simple rules:

1. Only lines between ### ---start_docs and ### ---stop_docs will be parsed.
2. Lines containing # nodoc will be excluded.
3. Lines containing ## :: indicate subsequent lines should be formatted as code blocks
4. Other lines beginning with ## <anything else> will have the prepended ## removed. This is how and where general rST formatting is added.
5. All other lines, including shell comments, will be indented by four spaces.

Enabling sosreport Collection

sosreport is a unified tool for collecting system logs and other debug information. To enable creation of sosreport(s) with this role, create a custom config (you can use centosci-logs.yml as a template) and ensure that artcl_collect_sosreport: true is set.

License

Apache 2.0

Author Information

RDO-CI Team