I saw this show years ago and remember loving the music. The acrobatic performances I recall less unfortunately. Carmen and I went to see this yesterday and were blown away by the strength, and grace of what we saw.
- https://github.com/ghostinthewires/Azure-Readiness-Checklist/blob/master/README.md A list of things to think about when planning to run a workload in Azure. (This list works equally well with pretty much any cloud platform I dare say.)
- https://engblog.nextdoor.com/what-is-the-technology-behind-nextdoor-in-2019-ccc3d2173eda Technology and tools, that feels to me like when a new technology is picked up it’s for good reason and in a measured way.
Heredoc that converts newlines to spaces and ignores leading indent
a_long_line: > line 1 line 2 line 3 ... # Prints: line 1 line 2 line 3
Heredoc that preserves newlines and ignores leading indent
private_key: | line 1 line 2 line 3 ... # Prints: line 1 line 2 line 3 ...
Perf Gathering facts is expensive If you can skip this step, do so I have a couple plays that looks at memory Think about tuning the number of forks 5 is the default Too many doesn't work (kinda heavy weight) 25-50 is probably good for a dedicated ansible server 5-25 for a dev machine Use scp (default is sftp) Increase ControlPersist (default 60s) Sample ansible.cfg [default] gathering = smart gather_subset = min fact_caching = jsonfile fact_caching_connection = ~/.ansible/cache fact_caching_timeout = 3600 forks=50 [ssh_connection] pipelining = True scp_if_ssh = True ssh_args = -C -o ControlMaster=auto -o ControlPersist=15m Python3 is better than python2
Use ansible to update centos packages
List updates > ansible -i "hosts / inventory file," all -m yum -a "list=updates" Apply updates > ansible -i "host / inventory file," all -m yum -a "name='*' state=latest"
“Genius has an important role in developing mathematics, but actually the knowledge itself is the result of the activity of a community. It’s the real goal of knowledge to become the knowledge of the community, not the knowledge of one or two persons.”André Joyal (Mathematician)
Powerful json message parsing on the command line
# Gets me all keys connected to the doc node jq '. | keys' a.json # Tells me how many sub docs are rooted at events jq '.events | count' a.json # Generate a csv from a json array # https://stackoverflow.com/questions/32960857/how-to-convert-arbitrary-simple-json-to-csv-using-jq/32965227#32965227 jq -r '(map(keys) | add | unique) as $cols | map(. as $row | $cols | map($row[.])) as $rows | $cols, $rows | @csv' a.js.out # Filter a list of json documents by the State field # Like Java's stream programming model (and other languages?) # filter, map, reduce! cat a.sh.out | jq '.BackupJobs | map(select(.State == "FAILED"))'
“On your journey through life, make sure your biographyI don’t know …
has at least one extraordinary chapter.”