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-rw-r--r--krebs/5pkgs/logf/default.nix103
1 files changed, 103 insertions, 0 deletions
diff --git a/krebs/5pkgs/logf/default.nix b/krebs/5pkgs/logf/default.nix
new file mode 100644
index 000000000..246e4d954
--- /dev/null
+++ b/krebs/5pkgs/logf/default.nix
@@ -0,0 +1,103 @@
+{ lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+
+let
+ default-host-colors = pkgs.writeJSON "logf.default-host-colors.json" {
+ };
+ default-prio-colors = pkgs.writeJSON "logf.default-prio-colors.json" {
+ "0" = 196; # emerg
+ "1" = 160; # alert
+ "2" = 124; # crit
+ "3" = 009; # err
+ "4" = 011; # warning
+ "5" = 255; # notice
+ "6" = 250; # info
+ "7" = 139; # debug
+ };
+in
+
+pkgs.writeDashBin "logf" ''
+ export LOGF_HOST_COLORS LOGF_PRIO_COLORS
+ LOGF_HOST_COLORS=$(cat "''${LOGF_HOST_COLORS-${default-host-colors}}")
+ LOGF_PRIO_COLORS=$(cat "''${LOGF_PRIO_COLORS-${default-prio-colors}}")
+ printf '%s\0' "$@" \
+ | ${pkgs.findutils}/bin/xargs -0 -P 0 -n 1 ${pkgs.writeDash "logf-remote" ''
+ target=$1 \
+ target_host=$(echo "$1" | sed 's/^.*@//;s/\..*//') \
+ exec 3>&1;
+ 2>&1 1>&3 ssh "$target" -T \
+ -o PreferredAuthentications=publickey \
+ -o StrictHostKeyChecking=yes \
+ exec journalctl -af -n 0 -o json \
+ | stdbuf -oL jq -Rf ${pkgs.writeJq "logf-remote-error.jq" ''
+ {
+ PRIORITY: "4",
+ MESSAGE: .,
+ SYSLOG_IDENTIFIER: env.target_host,
+ }
+ ''}
+ sleep 10m
+ exec "$0" "$@"
+ ''} \
+ | ${pkgs.jq}/bin/jq -rf ${pkgs.writeJq "logf-filter.jq" ''
+ (env.LOGF_HOST_COLORS | fromjson) as $host_colors |
+ (env.LOGF_PRIO_COLORS | fromjson) as $prio_colors |
+
+ def when(c; f): if c then f else . end;
+
+ # anaphoric gsub
+ def agsub(re; f):
+ gsub("(?<it>\(re))"; .it | f);
+
+ # :: [int] -> sgr
+ def sgr: "\u001b[\(map(tostring) | join(";"))m";
+
+ # :: sgr
+ def rst: [] | sgr;
+
+ # :: int -> sgr
+ def fg(i): [38,5,i]|sgr;
+ # TODO def fg(r;g;b): [38,2,r,g,b]|sgr;
+ # http://cvs.schmorp.de/rxvt-unicode/src/command.C?revision=1.570&view=markup&sortby=log&sortdir=down
+
+ # (sgr; sgr) | (null; any) :: str -> str
+ def col(a; b): when(a != null; a + . + b);
+ def col(a): col(a; rst);
+
+
+ def p_time:
+ ._SOURCE_REALTIME_TIMESTAMP
+ | if . != null then . | fromjson | . / 1000000 else now end
+ | gmtime
+ | todateiso8601
+ | col(fg(237));
+
+ def p_host:
+ ._HOSTNAME
+ | if . != null then . else "-" end
+ | col($host_colors[.]|when(. != null; fg(.)));
+
+ def p_ident:
+ if .SYSLOG_IDENTIFIER != null then .SYSLOG_IDENTIFIER
+ else ._COMM end
+ | col(fg(244));
+
+ def p_message:
+ fg($prio_colors[if has("PRIORITY") then .PRIORITY else "-" end])
+ as $prio_c |
+ .MESSAGE
+ | sub("\r$"; "")
+ | agsub("\\btv@nomic\\b"; "\(.)\u0007" | col(fg(219); $prio_c))
+ #| agsub("Start queue"; "\(.)\u0007" | col(fg(42); $prio_c))
+ | col($prio_c);
+
+
+ [ p_time
+ , p_host
+ , p_ident
+ , p_message
+ ]
+ | join(" ")
+ ''}
+''