Merge branch 'master' into site-redesign

skybet · Apr 20, 2021 · 1016ad7 · 1016ad7
2 parents 471f67b + 5837584
commit 1016ad7
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diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,4 @@
 language: ruby
 rvm:
- - 2.2
-script: bundle exec rspec spec
+ - 2.7
+script: bundle exec rspec spec
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.0.3.1)
+    activesupport (6.0.3.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -19,47 +19,50 @@ GEM
     colorator (1.1.0)
     commonmarker (0.17.13)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.6)
-    diff-lcs (1.3)
-    dnsruby (1.61.3)
-      addressable (~> 2.5)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.8)
+    diff-lcs (1.4.4)
+    dnsruby (1.61.5)
+      simpleidn (~> 0.1)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     ethon (0.12.0)
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (1.0.0)
+    faraday (1.3.0)
+      faraday-net_http (~> 1.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.12.2)
+      ruby2_keywords
+    faraday-net_http (1.0.1)
+    ffi (1.15.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    github-pages (204)
-      github-pages-health-check (= 1.16.1)
-      jekyll (= 3.8.5)
+    github-pages (214)
+      github-pages-health-check (= 1.17.0)
+      jekyll (= 3.9.0)
       jekyll-avatar (= 0.7.0)
       jekyll-coffeescript (= 1.1.1)
       jekyll-commonmark-ghpages (= 0.1.6)
       jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.13.0)
+      jekyll-feed (= 0.15.1)
       jekyll-gist (= 1.5.0)
       jekyll-github-metadata (= 2.13.0)
-      jekyll-mentions (= 1.5.1)
+      jekyll-mentions (= 1.6.0)
       jekyll-optional-front-matter (= 0.3.2)
       jekyll-paginate (= 1.1.0)
       jekyll-readme-index (= 0.3.0)
-      jekyll-redirect-from (= 0.15.0)
+      jekyll-redirect-from (= 0.16.0)
       jekyll-relative-links (= 0.6.1)
-      jekyll-remote-theme (= 0.4.1)
+      jekyll-remote-theme (= 0.4.3)
       jekyll-sass-converter (= 1.5.2)
-      jekyll-seo-tag (= 2.6.1)
+      jekyll-seo-tag (= 2.7.1)
       jekyll-sitemap (= 1.4.0)
       jekyll-swiss (= 1.0.0)
       jekyll-theme-architect (= 0.1.1)
       jekyll-theme-cayman (= 0.1.1)
       jekyll-theme-dinky (= 0.1.1)
-      jekyll-theme-hacker (= 0.1.1)
+      jekyll-theme-hacker (= 0.1.2)
       jekyll-theme-leap-day (= 0.1.1)
       jekyll-theme-merlot (= 0.1.1)
       jekyll-theme-midnight (= 0.1.1)
@@ -70,34 +73,35 @@ GEM
       jekyll-theme-tactile (= 0.1.1)
       jekyll-theme-time-machine (= 0.1.1)
       jekyll-titles-from-headings (= 0.5.3)
-      jemoji (= 0.11.1)
-      kramdown (= 1.17.0)
+      jemoji (= 0.12.0)
+      kramdown (= 2.3.1)
+      kramdown-parser-gfm (= 1.1.0)
       liquid (= 4.0.3)
       mercenary (~> 0.3)
       minima (= 2.5.1)
       nokogiri (>= 1.10.4, < 2.0)
-      rouge (= 3.13.0)
+      rouge (= 3.26.0)
       terminal-table (~> 1.4)
-    github-pages-health-check (1.16.1)
+    github-pages-health-check (1.17.0)
       addressable (~> 2.3)
       dnsruby (~> 1.60)
       octokit (~> 4.0)
-      public_suffix (~> 3.0)
+      public_suffix (>= 2.0.2, < 5.0)
       typhoeus (~> 1.3)
-    html-pipeline (2.12.3)
+    html-pipeline (2.14.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.5)
+    jekyll (3.9.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (>= 1.17, < 3)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
@@ -117,33 +121,34 @@ GEM
       rouge (>= 2.0, < 4.0)
     jekyll-default-layout (0.1.4)
       jekyll (~> 3.0)
-    jekyll-feed (0.13.0)
+    jekyll-feed (0.15.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
     jekyll-github-metadata (2.13.0)
       jekyll (>= 3.4, < 5.0)
       octokit (~> 4.0, != 4.4.0)
-    jekyll-mentions (1.5.1)
+    jekyll-mentions (1.6.0)
       html-pipeline (~> 2.3)
       jekyll (>= 3.7, < 5.0)
     jekyll-optional-front-matter (0.3.2)
       jekyll (>= 3.0, < 5.0)
     jekyll-paginate (1.1.0)
     jekyll-readme-index (0.3.0)
       jekyll (>= 3.0, < 5.0)
-    jekyll-redirect-from (0.15.0)
+    jekyll-redirect-from (0.16.0)
       jekyll (>= 3.3, < 5.0)
     jekyll-relative-links (0.6.1)
       jekyll (>= 3.3, < 5.0)
-    jekyll-remote-theme (0.4.1)
+    jekyll-remote-theme (0.4.3)
       addressable (~> 2.0)
       jekyll (>= 3.5, < 5.0)
-      rubyzip (>= 1.3.0)
+      jekyll-sass-converter (>= 1.0, <= 3.0.0, != 2.0.0)
+      rubyzip (>= 1.3.0, < 3.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-seo-tag (2.6.1)
-      jekyll (>= 3.3, < 5.0)
+    jekyll-seo-tag (2.7.1)
+      jekyll (>= 3.8, < 5.0)
     jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-swiss (1.0.0)
@@ -156,8 +161,8 @@ GEM
     jekyll-theme-dinky (0.1.1)
       jekyll (~> 3.5)
       jekyll-seo-tag (~> 2.0)
-    jekyll-theme-hacker (0.1.1)
-      jekyll (~> 3.5)
+    jekyll-theme-hacker (0.1.2)
+      jekyll (> 3.5, < 5.0)
       jekyll-seo-tag (~> 2.0)
     jekyll-theme-leap-day (0.1.1)
       jekyll (~> 3.5)
@@ -191,53 +196,60 @@ GEM
       jekyll (>= 3.3, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    jemoji (0.11.1)
+    jemoji (0.12.0)
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (1.17.0)
+    kramdown (2.3.1)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.5.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.14.1)
+    minitest (5.14.4)
     multipart-post (2.1.1)
-    nokogiri (1.10.8)
-      mini_portile2 (~> 2.4.0)
-    octokit (4.16.0)
+    nokogiri (1.11.2)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    octokit (4.20.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.1.1)
-    rake (13.0.1)
-    rb-fsevent (0.10.3)
+    public_suffix (4.0.6)
+    racc (1.5.2)
+    rake (13.0.3)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rexml (3.2.4)
     robotex (1.0.0)
-    rouge (3.13.0)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.1)
-      rspec-support (~> 3.9.1)
-    rspec-expectations (3.9.0)
+    rouge (3.26.0)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.1)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.1)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.2)
-    ruby-enum (0.7.2)
+      rspec-support (~> 3.10.0)
+    rspec-support (3.10.2)
+    ruby-enum (0.9.0)
       i18n
-    rubyzip (1.3.0)
+    ruby2_keywords (0.0.4)
+    rubyzip (2.3.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -247,15 +259,20 @@ GEM
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
+    simpleidn (0.2.1)
+      unf (~> 0.1.4)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
-    typhoeus (1.3.1)
+    typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
-    unicode-display_width (1.6.1)
-    zeitwerk (2.3.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.7)
+    unicode-display_width (1.7.0)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
@@ -267,4 +284,4 @@ DEPENDENCIES
   rspec
 
 BUNDLED WITH
-   2.0.1
+   2.0.2
diff --git a/_includes/footer.html b/_includes/footer.html
@@ -35,4 +35,4 @@ <h3>Before you go&hellip;</h3>
 		</footer>
 		</div>
 	</body>
-</html>
+</html>
diff --git a/_posts/2020-12-09-its-just-a-monitoring-change.md b/_posts/2020-12-09-its-just-a-monitoring-change.md
@@ -32,3 +32,5 @@ As with all major incidents and service interruptions, a Post Incident Review wa
 A number of these improvements are already underway, and changes have been made to the `query_exporter`  to ensure that it doesn't ever attempt to create more than two simultaneous connections to the database. As for the underlying cause of the incident (or the "root cause" if you insist on using such language), that has to be the fact that our assumptions as teams or individuals are ultimately formed by our past experiences. Given our past experiences would suggest that a metrics endpoint is relatively low-resource, we saw no problem with polling it as such a high rate. Engineers that work directly with the database, and have indeed already written their own exporters that make use of database queries, would know for certain that this should be handled with a lot more caution.
 
 Above all else, this has been a very useful reminder that even what appears to be a simple change to monitoring might in fact be the thing that causes your revenue-generating services to grind to a halt.
+
+**EDIT (2021-02-22): The contents of this blog post have been discussed further on the [Software Misadventures](https://softwaremisadventures.com/podcast/2021/02/ols/) podcast.**
diff --git a/images/logos/logo-cross-sky-lotto.png b/images/logos/logo-cross-sky-lotto.png
-Original file line number
+Diff line change
@@ Expand Up / @@ -35,4 +35,4 @@ <h3>Before you go…</h3> @@
     		</footer>
     		</div>
     	</body>
-    </html>
+    </html>
Original file line number	Diff line number	Diff line change
Expand Up		@@ -32,3 +32,5 @@ As with all major incidents and service interruptions, a Post Incident Review wa
		A number of these improvements are already underway, and changes have been made to the `query_exporter` to ensure that it doesn't ever attempt to create more than two simultaneous connections to the database. As for the underlying cause of the incident (or the "root cause" if you insist on using such language), that has to be the fact that our assumptions as teams or individuals are ultimately formed by our past experiences. Given our past experiences would suggest that a metrics endpoint is relatively low-resource, we saw no problem with polling it as such a high rate. Engineers that work directly with the database, and have indeed already written their own exporters that make use of database queries, would know for certain that this should be handled with a lot more caution.

		Above all else, this has been a very useful reminder that even what appears to be a simple change to monitoring might in fact be the thing that causes your revenue-generating services to grind to a halt.

		EDIT (2021-02-22): The contents of this blog post have been discussed further on the [Software Misadventures](https://softwaremisadventures.com/podcast/2021/02/ols/) podcast.